On 2019-Feb-10, at 11:34, Steve Kargl <sgk at troutmask.apl.washington.edu>
wrote:
> Having set CFLAGS+=-march=native -mtune=native and trying to
> force qt5-gui configure with -sse2 option, I have a config.summary
> that contains (my in-line comments ***)
>
> Build type: freebsd-clang (i386, CPU features: <none>)
>
> *** What????? ***
>
> Compiler: clang 7.0.1
> Configuration: compile_examples largefile rdrnd x86SimdAlways sharedr
> rpath release c++11 c++14 concurrent dbus reduce_exports reduce_relocations
> stl
> Build options:
> Mode ................................... release
> Optimize release build for size ........ no
> Building shared libraries .............. yes
> Using C standard ....................... C11
> Using C++ standard ..................... C++14
> Using ccache ........................... no
> Using gold linker ...................... no
> Using precompiled headers .............. no
> Using LTCG ............................. no
> Target compiler supports:
> SSE .................................. <none>
>
> *** That's not good. ***
>
> AVX .................................. <none>
> AVX512 ............................... <none>
> Other x86 ............................ RDRAND
> Intrinsics without -mXXX option ...... yes
> Build parts ............................ libs tools
/usr/ports/Mk/Uses/qt-dist.mk has:
. if ${ARCH} == i386 && empty(MACHINE_CPU:Msse2)
CONFIGURE_ARGS+= -no-sse2
. endif
This traces back to:
/usr/src/share/mk/bsd.cpu.mk and its:
. elif ${MACHINE_CPUARCH} == "amd64"
MACHINE_CPU = amd64 sse2 sse mmx
. elif ${MACHINE_CPUARCH} == "arm"
MACHINE_CPU = arm
. elif ${MACHINE_CPUARCH} == "i386"
MACHINE_CPU = i486
and (I'll not list it all):
########## i386
. if ${MACHINE_CPUARCH} == "i386"
. if ${CPUTYPE} == "znver1"
MACHINE_CPU = avx2 avx sse42 sse41 ssse3 sse4a sse3 sse2 sse mmx k6 k5 i586
. elif ${CPUTYPE} == "bdver4"
MACHINE_CPU = xop avx2 avx sse42 sse41 ssse3 sse4a sse3 sse2 sse mmx k6 k5 i586
. elif ${CPUTYPE} == "bdver3" || ${CPUTYPE} == "bdver2" || \
${CPUTYPE} == "bdver1"
MACHINE_CPU = xop avx sse42 sse41 ssse3 sse4a sse3 sse2 sse mmx k6 k5 i586
. elif ${CPUTYPE} == "btver2"
MACHINE_CPU = avx sse42 sse41 ssse3 sse4a sse3 sse2 sse mmx k6 k5 i586
. elif ${CPUTYPE} == "btver1"
MACHINE_CPU = ssse3 sse4a sse3 sse2 sse mmx k6 k5 i586
. elif ${CPUTYPE} == "amdfam10"
MACHINE_CPU = athlon-xp athlon k7 3dnow sse4a sse3 sse2 sse mmx k6 k5 i586
. elif ${CPUTYPE} == "opteron-sse3" || ${CPUTYPE} == "athlon64-sse3"
MACHINE_CPU = athlon-xp athlon k7 3dnow sse3 sse2 sse mmx k6 k5 i586
. elif ${CPUTYPE} == "opteron" || ${CPUTYPE} == "athlon64" || \
. . .
and:
########## amd64
. elif ${MACHINE_CPUARCH} == "amd64"
. if ${CPUTYPE} == "znver1"
MACHINE_CPU = avx2 avx sse42 sse41 ssse3 sse4a sse3
. . .
. endif
MACHINE_CPU += amd64 sse2 sse mmx
########## Mips
. elif ${MACHINE_CPUARCH} == "mips"
So it looks like freeBSD expects CPUTYPE to be set for i368 in order
to enable sse2 in MACHINE_CPU . Other things have a similar status
for amd64 but amd64 always has sse2 .
===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)
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