5b0f9e417
Eric Andersen
2002-06-23
Subject
Rework optimization code. Be more compiler aware. -Erik
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Rules.mak+36 -6
| @@ -111,16 +111,46 @@ export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP | |
| #CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR) | |
| #GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp") | |
| - | # use '-Os' optimization if available, else use -O2 |
| - | OPTIMIZATION:=${shell if $(CC) -Os -S -o /dev/null -xc /dev/null \ |
| - | >/dev/null 2>&1; then echo "-Os"; else echo "-O2" ; fi} |
| - | GCC_STACK_BOUNDRY:=${shell if $(CC) -mpreferred-stack-boundary=2 -S -o /dev/null -xc /dev/null \ |
| - | >/dev/null 2>&1; then echo "-mpreferred-stack-boundary=2"; else echo "" ; fi} |
| - | OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer $(GCC_STACK_BOUNDRY) #-fstrict-aliasing -march=i386 -mcpu=i386 -malign-functions=0 -malign-jumps=0 |
| WARNINGS:=-Wall -Wstrict-prototypes -Wshadow | |
| CFLAGS:=-I$(TOPDIR)include | |
| ARFLAGS:=-r | |
| + | TARGET_ARCH:=${shell $(CC) -dumpmachine | sed -e s'/-.*//' \ |
| + | -e 's/i.86/i386/' \ |
| + | -e 's/sparc.*/sparc/' \ |
| + | -e 's/arm.*/arm/g' \ |
| + | -e 's/m68k.*/m68k/' \ |
| + | -e 's/ppc/powerpc/g' \ |
| + | -e 's/v850.*/v850/g' \ |
| + | -e 's/sh[234]/sh/' \ |
| + | -e 's/mips.*/mips/' \ |
| + | } |
| + | |
| + | #-------------------------------------------------------- |
| + | # Arch specific compiler optimization stuff should go here. |
| + | # Unless you want to override the defaults, do not set anything |
| + | # for OPTIMIZATION... |
| + | |
| + | # use '-Os' optimization if available, else use -O2 |
| + | OPTIMIZATION := ${shell if $(CC) -Os -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \ |
| + | then echo "-Os"; else echo "-O2" ; fi} |
| + | |
| + | # Some nice architecture specific optimizations |
| + | ifeq ($(strip $(TARGET_ARCH)),arm) |
| + | OPTIMIZATION+=-fstrict-aliasing |
| + | endif |
| + | ifeq ($(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 $(CC) -malign-functions=0 -malign-jumps=0 -S -o /dev/null -xc \ |
| + | /dev/null >/dev/null 2>&1; then echo "-malign-functions=0 -malign-jumps=0"; fi; fi} |
| + | endif |
| + | OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer |
| + | |
| # | |
| #-------------------------------------------------------- | |
| # If you're going to do a lot of builds with a non-vanilla configuration, | |