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Use "-march=native" when possible.

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Recent versions of GCC have a tuning option value of 'native', which causes
the compiler to optimize the build for the CPU the compile is performed on.
Since most people are building Asterisk on the machine they plan to run it on,
the configure script and build system will now use this value unless a different
value is specified by the user in CFLAGS when the configure script is executed.
In addition, this value will be used for building the GSM and LPC10 codecs as
well, in preference to the logic that has been in their Makefiles forever to
optimize for certain types of CPUs.



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@310332 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2011-03-11 15:09:23 +00:00
parent c7c0664bc4
commit 7cf70df999
6 changed files with 492 additions and 532 deletions
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14
Makefile
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@@ -223,8 +223,12 @@ ifneq ($(findstring BSD,$(OSARCH)),)
endif
ifeq ($(findstring -march,$(_ASTCFLAGS) $(ASTCFLAGS)),)
ifneq ($(PROC),ultrasparc)
_ASTCFLAGS+=$(shell if $(CC) -march=$(PROC) -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-march=$(PROC)"; fi)
ifneq ($(AST_MARCH_NATIVE),)
_ASTCFLAGS+=$(AST_MARCH_NATIVE)
else
ifneq ($(PROC),ultrasparc)
_ASTCFLAGS+=$(shell if $(CC) -march=$(PROC) -S -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-march=$(PROC)"; fi)
endif
endif
endif
@@ -233,8 +237,10 @@ ifeq ($(PROC),ppc)
endif
ifeq ($(OSARCH),FreeBSD)
ifeq ($(PROC),i386)
_ASTCFLAGS+=-march=i686
ifeq ($(findstring -march,$(_ASTCFLAGS) $(ASTCFLAGS)),)
ifeq ($(PROC),i386)
_ASTCFLAGS+=-march=i686
endif
endif
# -V is understood by BSD Make, not by GNU make.
BSDVERSION=$(shell make -V OSVERSION -f /usr/share/mk/bsd.port.subdir.mk)