123 files changed, 256 insertions, 251 deletions
diff --git a/demos/KINETIS/RT-FREEDOM-K20D50M-EXT/Makefile b/demos/KINETIS/RT-FREEDOM-K20D50M-EXT/Makefile
index 022e4bc5c..2e2fad272 100644
--- a/demos/KINETIS/RT-FREEDOM-K20D50M-EXT/Makefile
+++ b/demos/KINETIS/RT-FREEDOM-K20D50M-EXT/Makefile
@@ -181,10 +181,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/KINETIS/RT-FREEDOM-K20D50M/Makefile b/demos/KINETIS/RT-FREEDOM-K20D50M/Makefile
index 022e4bc5c..2e2fad272 100644
--- a/demos/KINETIS/RT-FREEDOM-K20D50M/Makefile
+++ b/demos/KINETIS/RT-FREEDOM-K20D50M/Makefile
@@ -181,10 +181,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/KINETIS/RT-FREEDOM-KL25Z-EXT/Makefile b/demos/KINETIS/RT-FREEDOM-KL25Z-EXT/Makefile
index bada3f623..d2f8aa271 100644
--- a/demos/KINETIS/RT-FREEDOM-KL25Z-EXT/Makefile
+++ b/demos/KINETIS/RT-FREEDOM-KL25Z-EXT/Makefile
@@ -176,10 +176,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/KINETIS/RT-FREEDOM-KL25Z/Makefile b/demos/KINETIS/RT-FREEDOM-KL25Z/Makefile
index bada3f623..d2f8aa271 100644
--- a/demos/KINETIS/RT-FREEDOM-KL25Z/Makefile
+++ b/demos/KINETIS/RT-FREEDOM-KL25Z/Makefile
@@ -176,10 +176,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/KINETIS/RT-MCHCK-K20-GPT/Makefile b/demos/KINETIS/RT-MCHCK-K20-GPT/Makefile
index 1d0357d9c..9969b7a8a 100644
--- a/demos/KINETIS/RT-MCHCK-K20-GPT/Makefile
+++ b/demos/KINETIS/RT-MCHCK-K20-GPT/Makefile
@@ -181,10 +181,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/KINETIS/RT-MCHCK-K20-SPI/Makefile b/demos/KINETIS/RT-MCHCK-K20-SPI/Makefile
index 1d0357d9c..9969b7a8a 100644
--- a/demos/KINETIS/RT-MCHCK-K20-SPI/Makefile
+++ b/demos/KINETIS/RT-MCHCK-K20-SPI/Makefile
@@ -181,10 +181,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/KINETIS/RT-TEENSY3/Makefile b/demos/KINETIS/RT-TEENSY3/Makefile
index d1e673a3b..02fedf4e8 100644
--- a/demos/KINETIS/RT-TEENSY3/Makefile
+++ b/demos/KINETIS/RT-TEENSY3/Makefile
@@ -181,10 +181,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/LPC21xx/RT-LPC214x-OLIMEX/Makefile b/demos/LPC21xx/RT-LPC214x-OLIMEX/Makefile
index 64158a75c..b6c0a82c6 100644
--- a/demos/LPC21xx/RT-LPC214x-OLIMEX/Makefile
+++ b/demos/LPC21xx/RT-LPC214x-OLIMEX/Makefile
@@ -204,10 +204,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/SPC5/NIL-SPC560D-EVB/Makefile b/demos/SPC5/NIL-SPC560D-EVB/Makefile
index 347ad3738..8d5ed1246 100644
--- a/demos/SPC5/NIL-SPC560D-EVB/Makefile
+++ b/demos/SPC5/NIL-SPC560D-EVB/Makefile
@@ -143,10 +143,10 @@ MOT  = $(CP) -O srec
 BIN  = $(CP) -O binary
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/SPC5/RT-SPC560B-EVB/Makefile b/demos/SPC5/RT-SPC560B-EVB/Makefile
index 92707c9a2..01cc6cdfe 100644
--- a/demos/SPC5/RT-SPC560B-EVB/Makefile
+++ b/demos/SPC5/RT-SPC560B-EVB/Makefile
@@ -146,10 +146,10 @@ MOT  = $(CP) -O srec
 BIN  = $(CP) -O binary
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/SPC5/RT-SPC560D-EVB/Makefile b/demos/SPC5/RT-SPC560D-EVB/Makefile
index 5806581da..72bef653a 100644
--- a/demos/SPC5/RT-SPC560D-EVB/Makefile
+++ b/demos/SPC5/RT-SPC560D-EVB/Makefile
@@ -146,10 +146,10 @@ MOT  = $(CP) -O srec
 BIN  = $(CP) -O binary
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/SPC5/RT-SPC560P-EVB/Makefile b/demos/SPC5/RT-SPC560P-EVB/Makefile
index 2b046fd7d..c295f7ba3 100644
--- a/demos/SPC5/RT-SPC560P-EVB/Makefile
+++ b/demos/SPC5/RT-SPC560P-EVB/Makefile
@@ -146,10 +146,10 @@ MOT  = $(CP) -O srec
 BIN  = $(CP) -O binary
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/SPC5/RT-SPC563M-EVB/Makefile b/demos/SPC5/RT-SPC563M-EVB/Makefile
index 3c78b47f6..37293219d 100644
--- a/demos/SPC5/RT-SPC563M-EVB/Makefile
+++ b/demos/SPC5/RT-SPC563M-EVB/Makefile
@@ -146,10 +146,10 @@ MOT  = $(CP) -O srec
 BIN  = $(CP) -O binary
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/SPC5/RT-SPC564A-EVB/Makefile b/demos/SPC5/RT-SPC564A-EVB/Makefile
index c35a0a124..87ee7913f 100644
--- a/demos/SPC5/RT-SPC564A-EVB/Makefile
+++ b/demos/SPC5/RT-SPC564A-EVB/Makefile
@@ -146,10 +146,10 @@ MOT  = $(CP) -O srec
 BIN  = $(CP) -O binary
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/SPC5/RT-SPC56EC-EVB/Makefile b/demos/SPC5/RT-SPC56EC-EVB/Makefile
index f952c8a4e..876d42fb2 100644
--- a/demos/SPC5/RT-SPC56EC-EVB/Makefile
+++ b/demos/SPC5/RT-SPC56EC-EVB/Makefile
@@ -146,10 +146,10 @@ MOT  = $(CP) -O srec
 BIN  = $(CP) -O binary
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/SPC5/RT-SPC56EL-EVB/Makefile b/demos/SPC5/RT-SPC56EL-EVB/Makefile
index 648d677dc..970f9e8e4 100644
--- a/demos/SPC5/RT-SPC56EL-EVB/Makefile
+++ b/demos/SPC5/RT-SPC56EL-EVB/Makefile
@@ -146,10 +146,10 @@ MOT  = $(CP) -O srec
 BIN  = $(CP) -O binary
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/CMSIS-STM32F407-DISCOVERY/Makefile b/demos/STM32/CMSIS-STM32F407-DISCOVERY/Makefile
index 92224a401..91b9054e0 100644
--- a/demos/STM32/CMSIS-STM32F407-DISCOVERY/Makefile
+++ b/demos/STM32/CMSIS-STM32F407-DISCOVERY/Makefile
@@ -182,10 +182,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/HAL-STM32F407-DISCOVERY/Makefile b/demos/STM32/HAL-STM32F407-DISCOVERY/Makefile
index a3a1d6e70..6c89a1637 100644
--- a/demos/STM32/HAL-STM32F407-DISCOVERY/Makefile
+++ b/demos/STM32/HAL-STM32F407-DISCOVERY/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/NIL-STM32F051-DISCOVERY/Makefile b/demos/STM32/NIL-STM32F051-DISCOVERY/Makefile
index 9b7a04d3e..02d224c7f 100644
--- a/demos/STM32/NIL-STM32F051-DISCOVERY/Makefile
+++ b/demos/STM32/NIL-STM32F051-DISCOVERY/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/NIL-STM32F100-DISCOVERY/Makefile b/demos/STM32/NIL-STM32F100-DISCOVERY/Makefile
index f59571c08..ab54ebde7 100644
--- a/demos/STM32/NIL-STM32F100-DISCOVERY/Makefile
+++ b/demos/STM32/NIL-STM32F100-DISCOVERY/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/NIL-STM32F303-DISCOVERY/Makefile b/demos/STM32/NIL-STM32F303-DISCOVERY/Makefile
index b067d01d4..7eba78d07 100644
--- a/demos/STM32/NIL-STM32F303-DISCOVERY/Makefile
+++ b/demos/STM32/NIL-STM32F303-DISCOVERY/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/NIL-STM32F373-STM32373C_EVAL/Makefile b/demos/STM32/NIL-STM32F373-STM32373C_EVAL/Makefile
index e3d61a772..a8db746b4 100644
--- a/demos/STM32/NIL-STM32F373-STM32373C_EVAL/Makefile
+++ b/demos/STM32/NIL-STM32F373-STM32373C_EVAL/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/NIL-STM32L152-DISCOVERY/Makefile b/demos/STM32/NIL-STM32L152-DISCOVERY/Makefile
index cac6281a1..ecf8b1864 100644
--- a/demos/STM32/NIL-STM32L152-DISCOVERY/Makefile
+++ b/demos/STM32/NIL-STM32L152-DISCOVERY/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F030R8-NUCLEO/Makefile b/demos/STM32/RT-STM32F030R8-NUCLEO/Makefile
index 2ea94f529..7b26e8d86 100644
--- a/demos/STM32/RT-STM32F030R8-NUCLEO/Makefile
+++ b/demos/STM32/RT-STM32F030R8-NUCLEO/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F051-DISCOVERY/Makefile b/demos/STM32/RT-STM32F051-DISCOVERY/Makefile
index 0d71f6833..b19b5b3ed 100644
--- a/demos/STM32/RT-STM32F051-DISCOVERY/Makefile
+++ b/demos/STM32/RT-STM32F051-DISCOVERY/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F072-DISCOVERY/Makefile b/demos/STM32/RT-STM32F072-DISCOVERY/Makefile
index 3735e9b23..3d398a8ab 100644
--- a/demos/STM32/RT-STM32F072-DISCOVERY/Makefile
+++ b/demos/STM32/RT-STM32F072-DISCOVERY/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F100-DISCOVERY/Makefile b/demos/STM32/RT-STM32F100-DISCOVERY/Makefile
index dc4dd1651..d302ec887 100644
--- a/demos/STM32/RT-STM32F100-DISCOVERY/Makefile
+++ b/demos/STM32/RT-STM32F100-DISCOVERY/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F103-MAPLEMINI/Makefile b/demos/STM32/RT-STM32F103-MAPLEMINI/Makefile
index 14e3bca12..e189b6d3b 100644
--- a/demos/STM32/RT-STM32F103-MAPLEMINI/Makefile
+++ b/demos/STM32/RT-STM32F103-MAPLEMINI/Makefile
@@ -190,10 +190,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F103-OLIMEX_STM32_P103/Makefile b/demos/STM32/RT-STM32F103-OLIMEX_STM32_P103/Makefile
index db90a1947..5c6b139e0 100644
--- a/demos/STM32/RT-STM32F103-OLIMEX_STM32_P103/Makefile
+++ b/demos/STM32/RT-STM32F103-OLIMEX_STM32_P103/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F103RB-NUCLEO/Makefile b/demos/STM32/RT-STM32F103RB-NUCLEO/Makefile
index c0e6c67b6..1a2f876e7 100644
--- a/demos/STM32/RT-STM32F103RB-NUCLEO/Makefile
+++ b/demos/STM32/RT-STM32F103RB-NUCLEO/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F103_INEMO_DISCOVERY/Makefile b/demos/STM32/RT-STM32F103_INEMO_DISCOVERY/Makefile
index 63c8599c4..8c72eceef 100644
--- a/demos/STM32/RT-STM32F103_INEMO_DISCOVERY/Makefile
+++ b/demos/STM32/RT-STM32F103_INEMO_DISCOVERY/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F302R8-NUCLEO/Makefile b/demos/STM32/RT-STM32F302R8-NUCLEO/Makefile
index dcdb27880..fc95cd9d4 100644
--- a/demos/STM32/RT-STM32F302R8-NUCLEO/Makefile
+++ b/demos/STM32/RT-STM32F302R8-NUCLEO/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F303-DISCOVERY/Makefile b/demos/STM32/RT-STM32F303-DISCOVERY/Makefile
index a3d40c6cf..0c32ac9c8 100644
--- a/demos/STM32/RT-STM32F303-DISCOVERY/Makefile
+++ b/demos/STM32/RT-STM32F303-DISCOVERY/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F334R8-NUCLEO/Makefile b/demos/STM32/RT-STM32F334R8-NUCLEO/Makefile
index 0ca45922f..228d143a3 100644
--- a/demos/STM32/RT-STM32F334R8-NUCLEO/Makefile
+++ b/demos/STM32/RT-STM32F334R8-NUCLEO/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F373-STM32373C_EVAL/Makefile b/demos/STM32/RT-STM32F373-STM32373C_EVAL/Makefile
index 3001ef6ab..48ce621e6 100644
--- a/demos/STM32/RT-STM32F373-STM32373C_EVAL/Makefile
+++ b/demos/STM32/RT-STM32F373-STM32373C_EVAL/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F401C-DISCOVERY/Makefile b/demos/STM32/RT-STM32F401C-DISCOVERY/Makefile
index fca643b76..15bb77935 100644
--- a/demos/STM32/RT-STM32F401C-DISCOVERY/Makefile
+++ b/demos/STM32/RT-STM32F401C-DISCOVERY/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F401RE-NUCLEO/Makefile b/demos/STM32/RT-STM32F401RE-NUCLEO/Makefile
index 8f55807b3..aa4e0fe21 100644
--- a/demos/STM32/RT-STM32F401RE-NUCLEO/Makefile
+++ b/demos/STM32/RT-STM32F401RE-NUCLEO/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F407-DISCOVERY-G++/Makefile b/demos/STM32/RT-STM32F407-DISCOVERY-G++/Makefile
index bf65677a4..648a7c66e 100644
--- a/demos/STM32/RT-STM32F407-DISCOVERY-G++/Makefile
+++ b/demos/STM32/RT-STM32F407-DISCOVERY-G++/Makefile
@@ -181,10 +181,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F407-DISCOVERY-MEMS/Makefile b/demos/STM32/RT-STM32F407-DISCOVERY-MEMS/Makefile
index 4adaa6e65..c2344d797 100644
--- a/demos/STM32/RT-STM32F407-DISCOVERY-MEMS/Makefile
+++ b/demos/STM32/RT-STM32F407-DISCOVERY-MEMS/Makefile
@@ -185,10 +185,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F407-DISCOVERY/Makefile b/demos/STM32/RT-STM32F407-DISCOVERY/Makefile
index 225812372..672d9aded 100644
--- a/demos/STM32/RT-STM32F407-DISCOVERY/Makefile
+++ b/demos/STM32/RT-STM32F407-DISCOVERY/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F407-OLIMEX_E407-LWIP-FATFS-USB/Makefile b/demos/STM32/RT-STM32F407-OLIMEX_E407-LWIP-FATFS-USB/Makefile
index ce41ce8fc..eaf9ee7df 100644
--- a/demos/STM32/RT-STM32F407-OLIMEX_E407-LWIP-FATFS-USB/Makefile
+++ b/demos/STM32/RT-STM32F407-OLIMEX_E407-LWIP-FATFS-USB/Makefile
@@ -189,10 +189,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F411RE-NUCLEO/Makefile b/demos/STM32/RT-STM32F411RE-NUCLEO/Makefile
index 04022acf7..d0e1aa043 100644
--- a/demos/STM32/RT-STM32F411RE-NUCLEO/Makefile
+++ b/demos/STM32/RT-STM32F411RE-NUCLEO/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32F429-DISCOVERY/Makefile b/demos/STM32/RT-STM32F429-DISCOVERY/Makefile
index daffd3d85..f99504f74 100644
--- a/demos/STM32/RT-STM32F429-DISCOVERY/Makefile
+++ b/demos/STM32/RT-STM32F429-DISCOVERY/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32L152-DISCOVERY/Makefile b/demos/STM32/RT-STM32L152-DISCOVERY/Makefile
index 8bcd4b933..579383bc7 100644
--- a/demos/STM32/RT-STM32L152-DISCOVERY/Makefile
+++ b/demos/STM32/RT-STM32L152-DISCOVERY/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/STM32/RT-STM32L152RE-NUCLEO/Makefile b/demos/STM32/RT-STM32L152RE-NUCLEO/Makefile
index d0fc04bb8..4bfc3cc7a 100644
--- a/demos/STM32/RT-STM32L152RE-NUCLEO/Makefile
+++ b/demos/STM32/RT-STM32L152RE-NUCLEO/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/various/NIL-ARMCM0-GENERIC/Makefile b/demos/various/NIL-ARMCM0-GENERIC/Makefile
index 555fcb89f..de47bb7c3 100644
--- a/demos/various/NIL-ARMCM0-GENERIC/Makefile
+++ b/demos/various/NIL-ARMCM0-GENERIC/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/various/NIL-ARMCM4-GENERIC/Makefile b/demos/various/NIL-ARMCM4-GENERIC/Makefile
index 92b7f18fe..1b4ebb822 100644
--- a/demos/various/NIL-ARMCM4-GENERIC/Makefile
+++ b/demos/various/NIL-ARMCM4-GENERIC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/various/RT-ARM7-GENERIC/Makefile b/demos/various/RT-ARM7-GENERIC/Makefile
index b48faf20f..bd26b728e 100644
--- a/demos/various/RT-ARM7-GENERIC/Makefile
+++ b/demos/various/RT-ARM7-GENERIC/Makefile
@@ -204,10 +204,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/various/RT-ARMCM0-GENERIC/Makefile b/demos/various/RT-ARMCM0-GENERIC/Makefile
index 7dfea4806..a495b31b1 100644
--- a/demos/various/RT-ARMCM0-GENERIC/Makefile
+++ b/demos/various/RT-ARMCM0-GENERIC/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/various/RT-ARMCM4-GENERIC/Makefile b/demos/various/RT-ARMCM4-GENERIC/Makefile
index a0a243c88..f9dc6580a 100644
--- a/demos/various/RT-ARMCM4-GENERIC/Makefile
+++ b/demos/various/RT-ARMCM4-GENERIC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/demos/various/RT-Win32-Simulator/Makefile b/demos/various/RT-Win32-Simulator/Makefile
index ca25fd0d9..0164f138d 100644
--- a/demos/various/RT-Win32-Simulator/Makefile
+++ b/demos/various/RT-Win32-Simulator/Makefile
@@ -108,7 +108,7 @@ LIBS    = $(DLIBS) $(ULIBS)
 
 LDFLAGS = -Wl,-Map=$(PROJECT).map,--cref,--no-warn-mismatch $(LIBDIR)
 ASFLAGS = -Wa,-amhls=$(<:.s=.lst) $(ADEFS)
-CPFLAGS = -Wall -Wextra -Wstrict-prototypes -fverbose-asm -Wa,-alms=$(<:.c=.lst) $(DEFS)
+CPFLAGS = -Wall -Wextra -Wundef -Wstrict-prototypes -fverbose-asm -Wa,-alms=$(<:.c=.lst) $(DEFS)
 
 # Generate dependency information
 CPFLAGS += -MD -MP -MF .dep/$(@F).d
diff --git a/demos/various/RT-Win32-Simulator/halconf.h b/demos/various/RT-Win32-Simulator/halconf.h
index 5b55d8fcf..73766ec0d 100644
--- a/demos/various/RT-Win32-Simulator/halconf.h
+++ b/demos/various/RT-Win32-Simulator/halconf.h
@@ -87,6 +87,13 @@
 #endif
 
 /**
+ * @brief   Enables the I2S subsystem.
+ */
+#if !defined(HAL_USE_I2S) || defined(__DOXYGEN__)
+#define HAL_USE_I2S                 FALSE
+#endif
+
+/**
  * @brief   Enables the ICU subsystem.
  */
 #if !defined(HAL_USE_ICU) || defined(__DOXYGEN__)
diff --git a/test/hal/testbuild/Makefile b/test/hal/testbuild/Makefile
index 36b46326a..8fb265acd 100644
--- a/test/hal/testbuild/Makefile
+++ b/test/hal/testbuild/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/test/nil/testbuild/Makefile b/test/nil/testbuild/Makefile
index 569f8c152..f3983897b 100644
--- a/test/nil/testbuild/Makefile
+++ b/test/nil/testbuild/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/test/rt/testbuild/Makefile b/test/rt/testbuild/Makefile
index 143ccbe01..888660393 100644
--- a/test/rt/testbuild/Makefile
+++ b/test/rt/testbuild/Makefile
@@ -99,7 +99,7 @@ LIBS    = $(DLIBS) $(ULIBS)
 
 LDFLAGS = -Wl,-Map=$(PROJECT).map,--cref,--no-warn-mismatch -lgcov $(LIBDIR)
 ASFLAGS = -Wa,-amhls=$(<:.s=.lst) $(ADEFS)
-CPFLAGS = $(OPT) -Wall -Wstrict-prototypes -fverbose-asm -Wa,-ahlms=$(<:.c=.lst) $(DEFS)
+CPFLAGS = $(OPT) -Wall -Wextra -Wundef -Wstrict-prototypes -fverbose-asm -Wa,-ahlms=$(<:.c=.lst) $(DEFS)
 
 # Generate dependency information
 CPFLAGS += -MD -MP -MF .dep/$(@F).d
diff --git a/test/rt/testbuild/pclint/gcc-include-path.lnt b/test/rt/testbuild/pclint/gcc-include-path.lnt
index 8bd8f249b..4d7cd42fd 100644
--- a/test/rt/testbuild/pclint/gcc-include-path.lnt
+++ b/test/rt/testbuild/pclint/gcc-include-path.lnt
@@ -1,6 +1,6 @@
---i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2014q4/arm-none-eabi/include"
---i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2014q4/arm-none-eabi/include/c++/4.9.3"
---i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2014q4/arm-none-eabi/include/c++/4.9.3/arm-none-eabi"
---i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2014q4/arm-none-eabi/include/c++/4.9.3/backward"
---i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2014q4/lib/gcc/arm-none-eabi/4.9.3/include"
---i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2014q4/lib/gcc/arm-none-eabi/4.9.3/include-fixed"
+--i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2015q1/arm-none-eabi/include"
+--i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2015q1/arm-none-eabi/include/c++/4.9.3"
+--i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2015q1/arm-none-eabi/include/c++/4.9.3/arm-none-eabi"
+--i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2015q1/arm-none-eabi/include/c++/4.9.3/backward"
+--i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2015q1/lib/gcc/arm-none-eabi/4.9.3/include"
+--i"C:/ChibiStudio/tools/GNU Tools ARM Embedded/4.9 2015q1/lib/gcc/arm-none-eabi/4.9.3/include-fixed"
diff --git a/test/rt/testdyn.c b/test/rt/testdyn.c
index 8dd6d5bf2..7a6cdfb20 100644
--- a/test/rt/testdyn.c
+++ b/test/rt/testdyn.c
@@ -50,7 +50,7 @@
  */
 
 #if CH_CFG_USE_DYNAMIC || defined(__DOXYGEN__)
-#if (CH_CFG_USE_HEAP && !CH_CFG_USE_MALLOC_HEAP) || defined(__DOXYGEN__)
+#if CH_CFG_USE_HEAP || defined(__DOXYGEN__)
 static memory_heap_t heap1;
 #endif
 #if CH_CFG_USE_MEMPOOLS || defined(__DOXYGEN__)
@@ -73,7 +73,7 @@ static THD_FUNCTION(thread, p) {
   test_emit_token(*(char *)p);
 }
 
-#if (CH_CFG_USE_HEAP && !CH_CFG_USE_MALLOC_HEAP) || defined(__DOXYGEN__)
+#if CH_CFG_USE_HEAP || defined(__DOXYGEN__)
 static void dyn1_setup(void) {
 
   chHeapObjectInit(&heap1, test.buffer, sizeof(union test_buffers));
@@ -180,8 +180,7 @@ ROMCONST struct testcase testdyn2 = {
 };
 #endif /* CH_CFG_USE_MEMPOOLS */
 
-#if (CH_CFG_USE_HEAP && !CH_CFG_USE_MALLOC_HEAP && CH_CFG_USE_REGISTRY) ||              \
-    defined(__DOXYGEN__)
+#if (CH_CFG_USE_HEAP && CH_CFG_USE_REGISTRY) || defined(__DOXYGEN__)
 /**
  * @page test_dynamic_003 Registry and References test
  *
@@ -251,14 +250,13 @@ ROMCONST struct testcase testdyn3 = {
  */
 ROMCONST struct testcase * ROMCONST patterndyn[] = {
 #if CH_CFG_USE_DYNAMIC || defined(__DOXYGEN__)
-#if (CH_CFG_USE_HEAP && !CH_CFG_USE_MALLOC_HEAP) || defined(__DOXYGEN__)
+#if CH_CFG_USE_HEAP || defined(__DOXYGEN__)
   &testdyn1,
 #endif
 #if CH_CFG_USE_MEMPOOLS || defined(__DOXYGEN__)
   &testdyn2,
 #endif
-#if (CH_CFG_USE_HEAP && !CH_CFG_USE_MALLOC_HEAP && CH_CFG_USE_REGISTRY) ||              \
-    defined(__DOXYGEN__)
+#if (CH_CFG_USE_HEAP && CH_CFG_USE_REGISTRY) || defined(__DOXYGEN__)
   &testdyn3,
 #endif
 #endif
diff --git a/test/rt/testheap.c b/test/rt/testheap.c
index 6686f8389..b1ab00103 100644
--- a/test/rt/testheap.c
+++ b/test/rt/testheap.c
@@ -44,7 +44,7 @@
  * @brief Heap header file
  */
 
-#if (CH_CFG_USE_HEAP && !CH_CFG_USE_MALLOC_HEAP) || defined(__DOXYGEN__)
+#if CH_CFG_USE_HEAP || defined(__DOXYGEN__)
 
 #define SIZE 16
 
@@ -152,7 +152,7 @@ ROMCONST struct testcase testheap1 = {
  * @brief   Test sequence for heap.
  */
 ROMCONST struct testcase * ROMCONST patternheap[] = {
-#if (CH_CFG_USE_HEAP && !CH_CFG_USE_MALLOC_HEAP) || defined(__DOXYGEN__)
+#if CH_CFG_USE_HEAP || defined(__DOXYGEN__)
   &testheap1,
 #endif
   NULL
diff --git a/testhal/KINETIS/ADC/Makefile b/testhal/KINETIS/ADC/Makefile
index 4250684cf..23716dd01 100644
--- a/testhal/KINETIS/ADC/Makefile
+++ b/testhal/KINETIS/ADC/Makefile
@@ -169,10 +169,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/KINETIS/I2C/Makefile b/testhal/KINETIS/I2C/Makefile
index 1d3773012..db19ef2f4 100644
--- a/testhal/KINETIS/I2C/Makefile
+++ b/testhal/KINETIS/I2C/Makefile
@@ -170,10 +170,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F0xx/ADC/Makefile b/testhal/STM32/STM32F0xx/ADC/Makefile
index 493c79f2e..e763da550 100644
--- a/testhal/STM32/STM32F0xx/ADC/Makefile
+++ b/testhal/STM32/STM32F0xx/ADC/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F0xx/EXT/Makefile b/testhal/STM32/STM32F0xx/EXT/Makefile
index 493c79f2e..e763da550 100644
--- a/testhal/STM32/STM32F0xx/EXT/Makefile
+++ b/testhal/STM32/STM32F0xx/EXT/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F0xx/IRQ_STORM/Makefile b/testhal/STM32/STM32F0xx/IRQ_STORM/Makefile
index 2fcacf23a..19800f516 100644
--- a/testhal/STM32/STM32F0xx/IRQ_STORM/Makefile
+++ b/testhal/STM32/STM32F0xx/IRQ_STORM/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F0xx/PWM-ICU/Makefile b/testhal/STM32/STM32F0xx/PWM-ICU/Makefile
index 493c79f2e..e763da550 100644
--- a/testhal/STM32/STM32F0xx/PWM-ICU/Makefile
+++ b/testhal/STM32/STM32F0xx/PWM-ICU/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F0xx/SPI/Makefile b/testhal/STM32/STM32F0xx/SPI/Makefile
index 493c79f2e..e763da550 100644
--- a/testhal/STM32/STM32F0xx/SPI/Makefile
+++ b/testhal/STM32/STM32F0xx/SPI/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F0xx/UART/Makefile b/testhal/STM32/STM32F0xx/UART/Makefile
index 493c79f2e..e763da550 100644
--- a/testhal/STM32/STM32F0xx/UART/Makefile
+++ b/testhal/STM32/STM32F0xx/UART/Makefile
@@ -175,10 +175,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F0xx/USB_CDC/Makefile b/testhal/STM32/STM32F0xx/USB_CDC/Makefile
index f6eda4bd0..7ff07a711 100644
--- a/testhal/STM32/STM32F0xx/USB_CDC/Makefile
+++ b/testhal/STM32/STM32F0xx/USB_CDC/Makefile
@@ -178,10 +178,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/ADC/Makefile b/testhal/STM32/STM32F1xx/ADC/Makefile
index 28328e084..af2021a01 100644
--- a/testhal/STM32/STM32F1xx/ADC/Makefile
+++ b/testhal/STM32/STM32F1xx/ADC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/CAN/Makefile b/testhal/STM32/STM32F1xx/CAN/Makefile
index 28328e084..af2021a01 100644
--- a/testhal/STM32/STM32F1xx/CAN/Makefile
+++ b/testhal/STM32/STM32F1xx/CAN/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/EXT/Makefile b/testhal/STM32/STM32F1xx/EXT/Makefile
index 28328e084..af2021a01 100644
--- a/testhal/STM32/STM32F1xx/EXT/Makefile
+++ b/testhal/STM32/STM32F1xx/EXT/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/I2C/Makefile b/testhal/STM32/STM32F1xx/I2C/Makefile
index 9bf94c69e..19da37e11 100644
--- a/testhal/STM32/STM32F1xx/I2C/Makefile
+++ b/testhal/STM32/STM32F1xx/I2C/Makefile
@@ -182,10 +182,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/IRQ_STORM/Makefile b/testhal/STM32/STM32F1xx/IRQ_STORM/Makefile
index d04abdbee..1967b5dc0 100644
--- a/testhal/STM32/STM32F1xx/IRQ_STORM/Makefile
+++ b/testhal/STM32/STM32F1xx/IRQ_STORM/Makefile
@@ -185,10 +185,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/PWM-ICU/Makefile b/testhal/STM32/STM32F1xx/PWM-ICU/Makefile
index 28328e084..af2021a01 100644
--- a/testhal/STM32/STM32F1xx/PWM-ICU/Makefile
+++ b/testhal/STM32/STM32F1xx/PWM-ICU/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/RTC/Makefile b/testhal/STM32/STM32F1xx/RTC/Makefile
index 918409276..9425ce988 100644
--- a/testhal/STM32/STM32F1xx/RTC/Makefile
+++ b/testhal/STM32/STM32F1xx/RTC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/SPI/Makefile b/testhal/STM32/STM32F1xx/SPI/Makefile
index 28328e084..af2021a01 100644
--- a/testhal/STM32/STM32F1xx/SPI/Makefile
+++ b/testhal/STM32/STM32F1xx/SPI/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/UART/Makefile b/testhal/STM32/STM32F1xx/UART/Makefile
index 28328e084..af2021a01 100644
--- a/testhal/STM32/STM32F1xx/UART/Makefile
+++ b/testhal/STM32/STM32F1xx/UART/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/USB_CDC/Makefile b/testhal/STM32/STM32F1xx/USB_CDC/Makefile
index d0e26747b..02ac0c92d 100644
--- a/testhal/STM32/STM32F1xx/USB_CDC/Makefile
+++ b/testhal/STM32/STM32F1xx/USB_CDC/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F1xx/USB_CDC_F107/Makefile b/testhal/STM32/STM32F1xx/USB_CDC_F107/Makefile
index ec5d27863..e53ff30aa 100644
--- a/testhal/STM32/STM32F1xx/USB_CDC_F107/Makefile
+++ b/testhal/STM32/STM32F1xx/USB_CDC_F107/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/ADC/Makefile b/testhal/STM32/STM32F30x/ADC/Makefile
index 9ef772421..c01cfa725 100644
--- a/testhal/STM32/STM32F30x/ADC/Makefile
+++ b/testhal/STM32/STM32F30x/ADC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/ADC_DUAL/Makefile b/testhal/STM32/STM32F30x/ADC_DUAL/Makefile
index 9ef772421..c01cfa725 100644
--- a/testhal/STM32/STM32F30x/ADC_DUAL/Makefile
+++ b/testhal/STM32/STM32F30x/ADC_DUAL/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/CAN/Makefile b/testhal/STM32/STM32F30x/CAN/Makefile
index 9ef772421..c01cfa725 100644
--- a/testhal/STM32/STM32F30x/CAN/Makefile
+++ b/testhal/STM32/STM32F30x/CAN/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/DAC/Makefile b/testhal/STM32/STM32F30x/DAC/Makefile
index 9ef772421..c01cfa725 100644
--- a/testhal/STM32/STM32F30x/DAC/Makefile
+++ b/testhal/STM32/STM32F30x/DAC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/EXT/Makefile b/testhal/STM32/STM32F30x/EXT/Makefile
index 9ef772421..c01cfa725 100644
--- a/testhal/STM32/STM32F30x/EXT/Makefile
+++ b/testhal/STM32/STM32F30x/EXT/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/IRQ_STORM/Makefile b/testhal/STM32/STM32F30x/IRQ_STORM/Makefile
index 19b65cd58..359e6e7b9 100644
--- a/testhal/STM32/STM32F30x/IRQ_STORM/Makefile
+++ b/testhal/STM32/STM32F30x/IRQ_STORM/Makefile
@@ -185,10 +185,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/PWM-ICU/Makefile b/testhal/STM32/STM32F30x/PWM-ICU/Makefile
index 9ef772421..c01cfa725 100644
--- a/testhal/STM32/STM32F30x/PWM-ICU/Makefile
+++ b/testhal/STM32/STM32F30x/PWM-ICU/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/SPI/Makefile b/testhal/STM32/STM32F30x/SPI/Makefile
index 9ef772421..c01cfa725 100644
--- a/testhal/STM32/STM32F30x/SPI/Makefile
+++ b/testhal/STM32/STM32F30x/SPI/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/UART/Makefile b/testhal/STM32/STM32F30x/UART/Makefile
index 9ef772421..c01cfa725 100644
--- a/testhal/STM32/STM32F30x/UART/Makefile
+++ b/testhal/STM32/STM32F30x/UART/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/USB_CDC/Makefile b/testhal/STM32/STM32F30x/USB_CDC/Makefile
index f55f57147..ba784f689 100644
--- a/testhal/STM32/STM32F30x/USB_CDC/Makefile
+++ b/testhal/STM32/STM32F30x/USB_CDC/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F30x/USB_CDC_IAD/Makefile b/testhal/STM32/STM32F30x/USB_CDC_IAD/Makefile
index bca414886..ffead1b7f 100644
--- a/testhal/STM32/STM32F30x/USB_CDC_IAD/Makefile
+++ b/testhal/STM32/STM32F30x/USB_CDC_IAD/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/ADC/Makefile b/testhal/STM32/STM32F37x/ADC/Makefile
index 6d6acd26a..4cb6e02b7 100644
--- a/testhal/STM32/STM32F37x/ADC/Makefile
+++ b/testhal/STM32/STM32F37x/ADC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/CAN/Makefile b/testhal/STM32/STM32F37x/CAN/Makefile
index 6d6acd26a..4cb6e02b7 100644
--- a/testhal/STM32/STM32F37x/CAN/Makefile
+++ b/testhal/STM32/STM32F37x/CAN/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/EXT/Makefile b/testhal/STM32/STM32F37x/EXT/Makefile
index 6d6acd26a..4cb6e02b7 100644
--- a/testhal/STM32/STM32F37x/EXT/Makefile
+++ b/testhal/STM32/STM32F37x/EXT/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/I2C/Makefile b/testhal/STM32/STM32F37x/I2C/Makefile
index 6d6acd26a..4cb6e02b7 100644
--- a/testhal/STM32/STM32F37x/I2C/Makefile
+++ b/testhal/STM32/STM32F37x/I2C/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/IRQ_STORM/Makefile b/testhal/STM32/STM32F37x/IRQ_STORM/Makefile
index 0914d41f8..e65a37279 100644
--- a/testhal/STM32/STM32F37x/IRQ_STORM/Makefile
+++ b/testhal/STM32/STM32F37x/IRQ_STORM/Makefile
@@ -185,10 +185,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/PWM-ICU/Makefile b/testhal/STM32/STM32F37x/PWM-ICU/Makefile
index 6d6acd26a..4cb6e02b7 100644
--- a/testhal/STM32/STM32F37x/PWM-ICU/Makefile
+++ b/testhal/STM32/STM32F37x/PWM-ICU/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/SDADC/Makefile b/testhal/STM32/STM32F37x/SDADC/Makefile
index 6d6acd26a..4cb6e02b7 100644
--- a/testhal/STM32/STM32F37x/SDADC/Makefile
+++ b/testhal/STM32/STM32F37x/SDADC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/SPI/Makefile b/testhal/STM32/STM32F37x/SPI/Makefile
index 6d6acd26a..4cb6e02b7 100644
--- a/testhal/STM32/STM32F37x/SPI/Makefile
+++ b/testhal/STM32/STM32F37x/SPI/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/UART/Makefile b/testhal/STM32/STM32F37x/UART/Makefile
index 6d6acd26a..4cb6e02b7 100644
--- a/testhal/STM32/STM32F37x/UART/Makefile
+++ b/testhal/STM32/STM32F37x/UART/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F37x/USB_CDC/Makefile b/testhal/STM32/STM32F37x/USB_CDC/Makefile
index 9151f14c7..9c77aed43 100644
--- a/testhal/STM32/STM32F37x/USB_CDC/Makefile
+++ b/testhal/STM32/STM32F37x/USB_CDC/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/ADC/Makefile b/testhal/STM32/STM32F4xx/ADC/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/ADC/Makefile
+++ b/testhal/STM32/STM32F4xx/ADC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/CAN/Makefile b/testhal/STM32/STM32F4xx/CAN/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/CAN/Makefile
+++ b/testhal/STM32/STM32F4xx/CAN/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/DAC/Makefile b/testhal/STM32/STM32F4xx/DAC/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/DAC/Makefile
+++ b/testhal/STM32/STM32F4xx/DAC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/DAC_DUAL/Makefile b/testhal/STM32/STM32F4xx/DAC_DUAL/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/DAC_DUAL/Makefile
+++ b/testhal/STM32/STM32F4xx/DAC_DUAL/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/DMA_STORM/Makefile b/testhal/STM32/STM32F4xx/DMA_STORM/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/DMA_STORM/Makefile
+++ b/testhal/STM32/STM32F4xx/DMA_STORM/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/EXT/Makefile b/testhal/STM32/STM32F4xx/EXT/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/EXT/Makefile
+++ b/testhal/STM32/STM32F4xx/EXT/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/GPT/Makefile b/testhal/STM32/STM32F4xx/GPT/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/GPT/Makefile
+++ b/testhal/STM32/STM32F4xx/GPT/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/I2C/Makefile b/testhal/STM32/STM32F4xx/I2C/Makefile
index ac7bcd64f..d1d9a3c6f 100644
--- a/testhal/STM32/STM32F4xx/I2C/Makefile
+++ b/testhal/STM32/STM32F4xx/I2C/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/I2S/Makefile b/testhal/STM32/STM32F4xx/I2S/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/I2S/Makefile
+++ b/testhal/STM32/STM32F4xx/I2S/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/IRQ_STORM/Makefile b/testhal/STM32/STM32F4xx/IRQ_STORM/Makefile
index 6107c5d57..6126b5621 100644
--- a/testhal/STM32/STM32F4xx/IRQ_STORM/Makefile
+++ b/testhal/STM32/STM32F4xx/IRQ_STORM/Makefile
@@ -185,10 +185,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/IRQ_STORM_FPU/Makefile b/testhal/STM32/STM32F4xx/IRQ_STORM_FPU/Makefile
index ec45b2d58..94149f7e4 100644
--- a/testhal/STM32/STM32F4xx/IRQ_STORM_FPU/Makefile
+++ b/testhal/STM32/STM32F4xx/IRQ_STORM_FPU/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/PWM-ICU/Makefile b/testhal/STM32/STM32F4xx/PWM-ICU/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/PWM-ICU/Makefile
+++ b/testhal/STM32/STM32F4xx/PWM-ICU/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/RTC/Makefile b/testhal/STM32/STM32F4xx/RTC/Makefile
index 05df94ea9..d78e63e6d 100644
--- a/testhal/STM32/STM32F4xx/RTC/Makefile
+++ b/testhal/STM32/STM32F4xx/RTC/Makefile
@@ -185,10 +185,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/SDC/Makefile b/testhal/STM32/STM32F4xx/SDC/Makefile
index b58498667..35f096c2d 100644
--- a/testhal/STM32/STM32F4xx/SDC/Makefile
+++ b/testhal/STM32/STM32F4xx/SDC/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/SPI/Makefile b/testhal/STM32/STM32F4xx/SPI/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/SPI/Makefile
+++ b/testhal/STM32/STM32F4xx/SPI/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/UART/Makefile b/testhal/STM32/STM32F4xx/UART/Makefile
index 1a4d920ad..83bb8fe99 100644
--- a/testhal/STM32/STM32F4xx/UART/Makefile
+++ b/testhal/STM32/STM32F4xx/UART/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/USB_CDC/Makefile b/testhal/STM32/STM32F4xx/USB_CDC/Makefile
index c016a4111..5b0aae485 100644
--- a/testhal/STM32/STM32F4xx/USB_CDC/Makefile
+++ b/testhal/STM32/STM32F4xx/USB_CDC/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32F4xx/USB_CDC_IAD/Makefile b/testhal/STM32/STM32F4xx/USB_CDC_IAD/Makefile
index 1f76a380c..56351076a 100644
--- a/testhal/STM32/STM32F4xx/USB_CDC_IAD/Makefile
+++ b/testhal/STM32/STM32F4xx/USB_CDC_IAD/Makefile
@@ -183,10 +183,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32L1xx/ADC/Makefile b/testhal/STM32/STM32L1xx/ADC/Makefile
index 1a8da29c4..30dbdbb11 100644
--- a/testhal/STM32/STM32L1xx/ADC/Makefile
+++ b/testhal/STM32/STM32L1xx/ADC/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32L1xx/EXT/Makefile b/testhal/STM32/STM32L1xx/EXT/Makefile
index 1a8da29c4..30dbdbb11 100644
--- a/testhal/STM32/STM32L1xx/EXT/Makefile
+++ b/testhal/STM32/STM32L1xx/EXT/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32L1xx/IRQ_STORM/Makefile b/testhal/STM32/STM32L1xx/IRQ_STORM/Makefile
index 13a55bb5f..ace51a973 100644
--- a/testhal/STM32/STM32L1xx/IRQ_STORM/Makefile
+++ b/testhal/STM32/STM32L1xx/IRQ_STORM/Makefile
@@ -185,10 +185,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32L1xx/PWM-ICU/Makefile b/testhal/STM32/STM32L1xx/PWM-ICU/Makefile
index 1a8da29c4..30dbdbb11 100644
--- a/testhal/STM32/STM32L1xx/PWM-ICU/Makefile
+++ b/testhal/STM32/STM32L1xx/PWM-ICU/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32L1xx/SPI/Makefile b/testhal/STM32/STM32L1xx/SPI/Makefile
index 1a8da29c4..30dbdbb11 100644
--- a/testhal/STM32/STM32L1xx/SPI/Makefile
+++ b/testhal/STM32/STM32L1xx/SPI/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings
diff --git a/testhal/STM32/STM32L1xx/UART/Makefile b/testhal/STM32/STM32L1xx/UART/Makefile
index 1a8da29c4..30dbdbb11 100644
--- a/testhal/STM32/STM32L1xx/UART/Makefile
+++ b/testhal/STM32/STM32L1xx/UART/Makefile
@@ -180,10 +180,10 @@ AOPT =
 TOPT = -mthumb -DTHUMB
 
 # Define C warning options here
-CWARN = -Wall -Wextra -Wstrict-prototypes
+CWARN = -Wall -Wextra -Wundef -Wstrict-prototypes
 
 # Define C++ warning options here
-CPPWARN = -Wall -Wextra
+CPPWARN = -Wall -Wextra -Wundef
 
 #
 # Compiler settings