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make: rename CFLAGS in target Makefiles to TGT_CFLAGS

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Renamed every instance of variable CFLAGS in target specific Makefiles
to TGT_CFLAGS to free up CFLAGS for user defined compiler flags.

Added information in README.md about existence and usage of CFLAGS
environment variable in build process.
This commit is contained in:
Tido Klaassen
2015-10-06 08:04:14 +02:00
committed by Karl Palsson
parent 9217a5f888
commit aad8d06c3f
25 changed files with 59 additions and 47 deletions
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4
lib/sam/3u/Makefile
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@@ -25,10 +25,10 @@ PREFIX ?= arm-none-eabi
CC = $(PREFIX)-gcc
AR = $(PREFIX)-ar
CFLAGS = -Os -Wall -Wextra -I../../../include -fno-common \
TGT_CFLAGS = -Os -Wall -Wextra -I../../../include -fno-common \
-mcpu=cortex-m3 -mthumb $(FP_FLAGS) -Wstrict-prototypes \
-ffunction-sections -fdata-sections -MD -DSAM3U
CFLAGS += $(DEBUG_FLAGS)
TGT_CFLAGS += $(DEBUG_FLAGS)
# ARFLAGS = rcsv
ARFLAGS = rcs
OBJS = gpio_common_all.o gpio_common_3a3u3x.o pmc.o usart.o