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If there is not a CPUTYPE defined by default, then allow for _CPUCFLAGS

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to tune for more advanced processors while still supporting the minimum
processor in an architecture.  We can do this with the '-mtune=' option
to gcc for alpha, sparc64, and powerpc and with the mis-named '-mcpu='
option for i386.

This defaults to tuning i386 builds for i686 machines though not using
any instructions that aren't found on an 80386.  For alpha it defaults
to tuning for an EV5.

Approved by:	peter
Peril sensitive sunglasses borrowed from:	peter
This commit is contained in:
John Baldwin 2002-07-27 22:04:05 +00:00
parent 30bbe52432
commit 8605c6b2ad
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=100772
1 changed files with 14 additions and 6 deletions
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20
share/mk/bsd.cpu.mk
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@ -1,17 +1,24 @@
# $FreeBSD$
# Set default baseline values of CPUTYPE based on MACHINE_ARCH -- this is
# the minimum CPU type we support for each architecture
# Set default CPU compile flags and baseline CPUTYPE for each arch. The
# compile flags must support the minimum CPU type for each architecture but
# may tune support for more advanced processors.
.if !defined(CPUTYPE)
.if ${MACHINE_ARCH} == "i386"
CPUTYPE ?= i386
_CPUCFLAGS = -mcpu=pentiumpro
CPUTYPE = i386
.elif ${MACHINE_ARCH} == "alpha"
CPUTYPE ?= ev5
_CPUCFLAGS = -mcpu=ev4 -mtune=ev5
CPUTYPE = ev4
.elif ${MACHINE_ARCH} == "ia64"
CPUTYPE ?= itanium
_CPUCFLAGS =
CPUTYPE = itanium
.elif ${MACHINE_ARCH} == "sparc64"
CPUTYPE ?= ultrasparc
_CPUCFLAGS =
CPUTYPE = ultrasparc
.endif
.else
# Handle aliases (not documented in make.conf to avoid user confusion
# between e.g. i586 and pentium)
@ -79,6 +86,7 @@ _CPUCFLAGS = -mcpu=ev4
. endif
. endif
.endif
.endif
# NB: COPTFLAGS is handled in /usr/src/sys/conf/Makefile.<arch>