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Use a nifty macro to make testing gcc features simpler

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and much easier to read.
 -Erik
This commit is contained in:
Eric Andersen 2002-10-30 06:55:37 +00:00
parent df5b8679a2
commit 1b6eb9b6eb
1 changed files with 8 additions and 9 deletions
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17
Rules.mak
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@ -125,6 +125,9 @@ TARGET_ARCH:=${shell $(CC) -dumpmachine | sed -e s'/-.*//' \
-e 's/sh[234]/sh/' \
-e 's/mips.*/mips/' \
}
# A nifty macro to make testing gcc features easier
check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
then echo "$(1)"; else echo "$(2)"; fi)
#--------------------------------------------------------
# Arch specific compiler optimization stuff should go here.
@ -132,8 +135,8 @@ TARGET_ARCH:=${shell $(CC) -dumpmachine | sed -e s'/-.*//' \
# for OPTIMIZATION...
# use '-Os' optimization if available, else use -O2
OPTIMIZATION := ${shell if $(CC) -Os -S -o /dev/null -xc /dev/null \
>/dev/null 2>&1; then echo "-Os"; else echo "-O2" ; fi}
OPTIMIZATION:=
OPTIMIZATION+=${call check_gcc,-Os,-O2}
# Some nice architecture specific optimizations
ifeq ($(strip $(TARGET_ARCH)),arm)
@ -141,13 +144,9 @@ ifeq ($(strip $(TARGET_ARCH)),arm)
endif
ifeq ($(strip $(TARGET_ARCH)),i386)
OPTIMIZATION+=-march=i386
OPTIMIZATION+=${shell if $(CC) -mpreferred-stack-boundary=2 -S -o /dev/null -xc \
/dev/null >/dev/null 2>&1; then echo "-mpreferred-stack-boundary=2"; fi}
OPTIMIZATION+=${shell if $(CC) -falign-functions=1 -falign-jumps=0 -falign-loops=0 \
-S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo \
"-falign-functions=1 -falign-jumps=0 -falign-loops=0"; else \
if $(CC) -malign-functions=0 -malign-jumps=0 -S -o /dev/null -xc \
/dev/null >/dev/null 2>&1; then echo "-malign-functions=0 -malign-jumps=0"; fi; fi}
OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
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