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Rework optimization code. Be more compiler aware.
-Erik
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commit
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42
Rules.mak
42
Rules.mak
@ -111,16 +111,46 @@ export VERSION BUILDTIME TOPDIR HOSTCC HOSTCFLAGS CROSS CC AR AS LD NM STRIP CPP
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#CROSS_CFLAGS+=-nostdinc -I$(LIBCDIR)/include -I$(GCCINCDIR)
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#GCCINCDIR:=$(shell gcc -print-search-dirs | sed -ne "s/install: \(.*\)/\1include/gp")
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# use '-Os' optimization if available, else use -O2
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OPTIMIZATION:=${shell if $(CC) -Os -S -o /dev/null -xc /dev/null \
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>/dev/null 2>&1; then echo "-Os"; else echo "-O2" ; fi}
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GCC_STACK_BOUNDRY:=${shell if $(CC) -mpreferred-stack-boundary=2 -S -o /dev/null -xc /dev/null \
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>/dev/null 2>&1; then echo "-mpreferred-stack-boundary=2"; else echo "" ; fi}
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OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer $(GCC_STACK_BOUNDRY) #-fstrict-aliasing -march=i386 -mcpu=i386 -malign-functions=0 -malign-jumps=0
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WARNINGS:=-Wall -Wstrict-prototypes -Wshadow
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CFLAGS:=-I$(TOPDIR)include
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ARFLAGS:=-r
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TARGET_ARCH:=${shell $(CC) -dumpmachine | sed -e s'/-.*//' \
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-e 's/i.86/i386/' \
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-e 's/sparc.*/sparc/' \
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-e 's/arm.*/arm/g' \
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-e 's/m68k.*/m68k/' \
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-e 's/ppc/powerpc/g' \
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-e 's/v850.*/v850/g' \
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-e 's/sh[234]/sh/' \
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-e 's/mips.*/mips/' \
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}
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#--------------------------------------------------------
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# Arch specific compiler optimization stuff should go here.
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# Unless you want to override the defaults, do not set anything
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# for OPTIMIZATION...
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# use '-Os' optimization if available, else use -O2
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OPTIMIZATION := ${shell if $(CC) -Os -S -o /dev/null -xc /dev/null >/dev/null 2>&1; \
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then echo "-Os"; else echo "-O2" ; fi}
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# Some nice architecture specific optimizations
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ifeq ($(strip $(TARGET_ARCH)),arm)
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OPTIMIZATION+=-fstrict-aliasing
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endif
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ifeq ($(strip $(TARGET_ARCH)),i386)
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OPTIMIZATION+=-march=i386
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OPTIMIZATION+=${shell if $(CC) -mpreferred-stack-boundary=2 -S -o /dev/null -xc \
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/dev/null >/dev/null 2>&1; then echo "-mpreferred-stack-boundary=2"; fi}
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OPTIMIZATION+=${shell if $(CC) -falign-functions=1 -falign-jumps=0 -falign-loops=0 \
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-S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo \
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"-falign-functions=1 -falign-jumps=0 -falign-loops=0"; else \
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if $(CC) -malign-functions=0 -malign-jumps=0 -S -o /dev/null -xc \
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/dev/null >/dev/null 2>&1; then echo "-malign-functions=0 -malign-jumps=0"; fi; fi}
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endif
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OPTIMIZATIONS:=$(OPTIMIZATION) -fomit-frame-pointer
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#
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#--------------------------------------------------------
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# If you're going to do a lot of builds with a non-vanilla configuration,
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