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further refine check_gcc usage so it is only called the bare min number of times

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This commit is contained in:
Mike Frysinger 2005-07-28 22:26:25 +00:00
parent c99e2c5f4c
commit b3b756dab3
1 changed files with 7 additions and 4 deletions
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11
Rules.mak
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@ -106,8 +106,11 @@ ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
endif
# A nifty macro to make testing gcc features easier
check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
then echo "$(1)"; else echo "$(2)"; fi)
check_gcc=$(shell \
if [ "$(1)" != "" ]; then \
if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
then echo "$(1)"; else echo "$(2)"; fi \
fi)
# Setup some shortcuts so that silent mode is silent like it should be
ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
@ -124,7 +127,7 @@ endif
# for OPTIMIZATION...
# use '-Os' optimization if available, else use -O2
OPTIMIZATION:=${call check_gcc,-Os,-O2}
OPTIMIZATION:=$(call check_gcc,-Os,-O2)
# Some nice architecture specific optimizations
ifeq ($(strip $(TARGET_ARCH)),arm)
@ -136,7 +139,7 @@ ifeq ($(strip $(TARGET_ARCH)),i386)
OPTIMIZATION+=$(call check_gcc,-falign-functions=0 -falign-jumps=0 -falign-loops=0,\
-malign-functions=0 -malign-jumps=0 -malign-loops=0)
endif
OPTIMIZATIONS=$(OPTIMIZATION) -fomit-frame-pointer
OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer
#
#--------------------------------------------------------