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config.mk: Make cc-option create a file under include/generated

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Testing for -fstack-usage requires the creation of an output file, which
isn't possible with /dev/null.

Signed-off-by: Tom Rini <trini@ti.com>
This commit is contained in:
Tom Rini 2012-02-14 07:29:37 +00:00 committed by Albert ARIBAUD
parent 667c9a8008
commit 6f4acc179c
1 changed files with 3 additions and 4 deletions
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7
config.mk
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@ -108,13 +108,12 @@ HOSTCFLAGS += -pedantic
# only supported compiler options are used
#
CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
$(if $(wildcard $(CC_OPTIONS_CACHE_FILE)),,\
$(shell mkdir -p $(dir $(CC_OPTIONS_CACHE_FILE))))
CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
-include $(CC_OPTIONS_CACHE_FILE)
cc-option-sys = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
> /dev/null 2>&1; then \
echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
echo "$(1)"; fi)