clang broken on current?

[Mark Millard]

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)