6 files changed, 12 insertions, 12 deletions
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