diff options
Diffstat (limited to 'demos/ARMCM3-STM32F103-GCC/Makefile')
| -rw-r--r-- | demos/ARMCM3-STM32F103-GCC/Makefile | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/demos/ARMCM3-STM32F103-GCC/Makefile b/demos/ARMCM3-STM32F103-GCC/Makefile index dbf9fd9eb..a0c76a43b 100644 --- a/demos/ARMCM3-STM32F103-GCC/Makefile +++ b/demos/ARMCM3-STM32F103-GCC/Makefile @@ -27,6 +27,9 @@ BIN = $(CP) -O binary MCU = cortex-m3
+# Enable this if you want the linker to remove unused code and data
+LINK_GC = yes
+
# List all default C defines here, like -D_DEBUG=1
DDEFS =
@@ -103,6 +106,10 @@ WARN = -Wall -Wstrict-prototypes # End of user defines
##############################################################################################
+ifeq ($(LINK_GC),yes)
+ OPT += -ffunction-sections -fdata-sections
+endif
+
INCDIR = $(patsubst %,-I%,$(DINCDIR) $(UINCDIR))
LIBDIR = $(patsubst %,-L%,$(DLIBDIR) $(ULIBDIR))
DEFS = $(DDEFS) $(UDEFS)
@@ -113,10 +120,14 @@ OBJS = $(ASMOBJS) $(COBJS) LIBS = $(DLIBS) $(ULIBS)
MCFLAGS = -mcpu=$(MCU) -mthumb
+ODFLAGS = -x --syms
ASFLAGS = $(MCFLAGS) -Wa,-amhls=$(<:.s=.lst) $(ADEFS)
CPFLAGS = $(MCFLAGS) $(OPT) $(WARN) -Wa,-alms=$(<:.c=.lst) $(DEFS)
-LDFLAGS = $(MCFLAGS) -nostartfiles -T$(LDSCRIPT) -Wl,-Map=$(PROJECT).map,--cref,--no-warn-mismatch $(LIBDIR)
-ODFLAGS = -x --syms
+ifeq ($(LINK_GC),yes)
+ LDFLAGS = $(MCFLAGS) -nostartfiles -T$(LDSCRIPT) -Wl,-Map=$(PROJECT).map,--cref,--no-warn-mismatch,--gc-sections $(LIBDIR)
+else
+ LDFLAGS = $(MCFLAGS) -nostartfiles -T$(LDSCRIPT) -Wl,-Map=$(PROJECT).map,--cref,--no-warn-mismatch $(LIBDIR)
+endif
# Generate dependency information
CPFLAGS += -MD -MP -MF .dep/$(@F).d
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