62d90fb793
* Rip out MACHINE_CPU stuff from sys.mk and include a new <bsd.cpu.mk>
after we pull in /etc/make.conf. We need to do it afterwards so we can
react to the user setting of the:
* CPUTYPE variable, which contains the CPU type which the user wants to
optimize for. For example, if you want your binaries to only run on an
i686-class machine (or higher), set this to i686. If you want to support
running binaries on a variety of CPU generations, set this to the lowest
common denominator. Supported values are listed in make.conf.
* bsd.cpu.mk does the expansion of CPUTYPE into MACHINE_CPU using the
(hopefully) correct unordered list of CPU types which should be used on
that CPU. For example, an AMD k6 CPU wants any of the following:
k6 k5 i586 i486 i386
This is still an unordered list so the client makefile logic is simple -
client makefiles need to test for the various elements of the set in
decreasing order of priority using ${MACHINE_CPU:M<foo>}, as before.
The various MACHINE_CPU lists are believed to be correct, but should be
checked.
* If NO_CPU_CFLAGS is not defined, add relevant gcc compiler optimization
settings by default (e.g. -karch=k6 for CPUTYPE=k6, etc). Release
builders and developers of third-party software need to make sure not to
enable CPU-specific optimization when generating code intended to be
portable. We probably need to move to an /etc/world.conf to allow the
optimization stuff to be applied separately to world/kernel and external
compilations, but it's not any worse a problem than it was before.
* Add coverage for the ia64/itanium MACHINE_ARCH/CPUTYPE.
* Add CPUTYPE support for all of the CPU types supported by FreeBSD and gcc
(only i386, alpha and ia64 first, since those are the minimally-working
ports. Other architecture porters, please feel free to add the relevant
gunk for your platform).
Reviewed by: jhb, obrien
102 lines
2.6 KiB
Makefile
102 lines
2.6 KiB
Makefile
# $FreeBSD$
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# Set default baseline values of CPUTYPE based on MACHINE_ARCH -- this is
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# the minimum CPU type we support for each architecture
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.if ${MACHINE_ARCH} == "i386"
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CPUTYPE ?= i386
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.elif ${MACHINE_ARCH} == "alpha"
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CPUTYPE ?= ev4
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.elif ${MACHINE_ARCH} == "ia64"
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CPUTYPE ?= itanium
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.endif
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# Handle aliases (not documented in make.conf to avoid user confusion
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# between e.g. i586 and pentium)
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.if ${MACHINE_ARCH} == "i386"
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. if ${CPUTYPE} == "pentiumpro"
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CPUTYPE = i686
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. elif ${CPUTYPE} == "pentium"
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CPUTYPE = i586
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. elif ${CPUTYPE} == "athlon"
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CPUTYPE = k7
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. endif
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.endif
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# Logic to set up correct gcc optimization flag. This must be included
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# after /etc/make.conf so it can react to the local value of CPUTYPE
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# defined therein.
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.if !defined(NO_CPU_CFLAGS)
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. if ${MACHINE_ARCH} == "i386"
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. if ${CPUTYPE} == "k7"
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CFLAGS += -march=k6 # gcc doesn't support athlon yet, but it will
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. elif ${CPUTYPE} == "k6"
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CFLAGS += -march=k6
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. elif ${CPUTYPE} == "k5"
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CFLAGS += -march=pentium
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. elif ${CPUTYPE} == "i686"
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CFLAGS += -march=pentiumpro
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. elif ${CPUTYPE} == "i586"
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CFLAGS += -march=pentium
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. elif ${CPUTYPE} == "i486"
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CFLAGS += -m486
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. endif
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. elif ${MACHINE_ARCH} == "alpha"
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. if ${CPUTYPE} == "ev6"
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CFLAGS += -mcpu=ev6
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. elif ${CPUTYPE} == "pca56"
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CFLAGS += -mcpu=pca56
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. elif ${CPUTYPE} == "ev56"
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CFLAGS += -mcpu=ev56
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. elif ${CPUTYPE} == "ev5"
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CFLAGS += -mcpu=ev5
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. elif ${CPUTYPE} == "ev45"
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CFLAGS += -mcpu=ev4 # No -mcpu=ev45 for gcc
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. elif ${CPUTYPE} == "ev4"
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CFLAGS += -mcpu=ev4
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. endif
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. endif
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.endif
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# Set up the list of CPU features based on the CPU type. This is an
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# unordered list to make it easy for client makefiles to test for the
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# presence of a CPU feature.
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.if ${MACHINE_ARCH} == "i386"
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. if ${CPUTYPE} == "k7"
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MACHINE_CPU = k7 k6 k5 i586 i486 i386
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. elif ${CPUTYPE} == "k6"
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MACHINE_CPU = k6 k5 i586 i486 i386
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. elif ${CPUTYPE} == "k5"
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MACHINE_CPU = k5 i586 i486 i386
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. elif ${CPUTYPE} == "i686"
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MACHINE_CPU = i686 i586 i486 i386
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. elif ${CPUTYPE} == "i586"
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MACHINE_CPU = i586 i486 i386
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. elif ${CPUTYPE} == "i486"
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MACHINE_CPU = i486 i386
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. elif ${CPUTYPE} == "i386"
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MACHINE_CPU = i386
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. endif
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.elif ${MACHINE_ARCH} == "alpha"
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. if ${CPUTYPE} == "ev6"
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MACHINE_CPU = ev6 ev56 pca56 ev5 ev45 ev4
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. elif ${CPUTYPE} == "pca56"
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MACHINE_CPU = pca56 ev56 ev5 ev45 ev4
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. elif ${CPUTYPE} == "ev56"
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MACHINE_CPU = ev56 ev5 ev45 ev4
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. elif ${CPUTYPE} == "ev5"
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MACHINE_CPU = ev5 ev45 ev4
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. elif ${CPUTYPE} == "ev45"
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MACHINE_CPU = ev45 ev4
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. elif ${CPUTYPE} == "ev4"
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MACHINE_CPU = ev4
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. endif
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.elif ${MACHINE_ARCH} == "ia64"
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. if ${CPUTYPE} == "itanium"
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MACHINE_CPU = itanium
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. endif
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.endif
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