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| author | Eric Andersen <andersen@codepoet.org> | 2002-10-30 06:55:37 +0000 |
|---|---|---|
| committer | Eric Andersen <andersen@codepoet.org> | 2002-10-30 06:55:37 +0000 |
| commit | 1b6eb9b6ebd7771db9d1bf481569085ff88197de (patch) | |
| tree | b6f6fe91659e6dc9be9fdcc1405544acbe5e94a3 /Rules.mak | |
| parent | df5b8679a28b54602e5a981b9ee0a5c30d0e4ba2 (diff) | |
| download | busybox-1b6eb9b6ebd7771db9d1bf481569085ff88197de.tar.gz | |
Use a nifty macro to make testing gcc features simpler
and much easier to read.
-Erik
Diffstat (limited to 'Rules.mak')
| -rw-r--r-- | Rules.mak | 17 |
1 files changed, 8 insertions, 9 deletions
@@ -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 |