1b6eb9b6e
Eric Andersen
2002-10-30
Subject
Use a nifty macro to make testing gcc features simpler and much easier to read. -Erik
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Rules.mak+8 -9
| @@ -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 | |