There are some tests in ltp where it conflicts especially for tunes used in qemux86, the test adds -mno-sse which does nullify -msse3 but does not nullify -mfpmath=sse and clang is pedantic about it whereas gcc just warns
here is ltp cmd cd tmp/work/core2-32-yoe-linux/ltp/20220527-r0/git/testcases/kernel/kvm % ../../../../recipe-sysroot-native/usr/bin/i686-yoe-linux/i686-yoe-linux-clang -target i686-yoe-linux -m32 -march=core2 -mtune=core2 -msse3 -mfpmath=sse -mlittle-endian --dyld-prefix=/usr -Qunused-arguments -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed -fmacro-prefix-map=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0=/usr/src/debug/ltp/20220527-r0 -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0=/usr/src/debug/ltp/20220527-r0 -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0/recipe-sysroot= -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0/recipe-sysroot-native= -Wl,-z,relro,-z,now -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0/recipe-sysroot -I/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0/git/testcases/kernel/kvm/include -DCOMPILE_PAYLOAD -ffreestanding -O2 -Wall -fno-asynchronous-unwind-tables -mno-mmx -mno-sse -fno-pie -c -o lib_guest.o lib_guest.c here is a reduced case % gcc -m32 -msse3 -mfpmath=sse -xc /dev/null -c -mno-sse cc1: warning: SSE instruction set disabled, using 387 arithmetics [kraj@apollo /tmp] % clang -m32 -msse3 -mfpmath=sse -xc /dev/null -c -mno-sse error: the 'sse' unit is not supported with this instruction set On Thu, Jul 7, 2022 at 11:05 AM Khem Raj <raj.k...@gmail.com> wrote: > > > > On 7/7/22 4:38 AM, Richard Purdie wrote: > > On Wed, 2022-07-06 at 20:59 -0700, Khem Raj wrote: > >> Fixes build errors seen with clang > >> error: the 'sse' unit is not supported with this instruction set > >> > >> Signed-off-by: Khem Raj <raj.k...@gmail.com> > >> --- > >> meta/recipes-extended/ltp/ltp_20220527.bb | 1 + > >> 1 file changed, 1 insertion(+) > >> > >> diff --git a/meta/recipes-extended/ltp/ltp_20220527.bb > >> b/meta/recipes-extended/ltp/ltp_20220527.bb > >> index b3ef8f59105..034b62b321e 100644 > >> --- a/meta/recipes-extended/ltp/ltp_20220527.bb > >> +++ b/meta/recipes-extended/ltp/ltp_20220527.bb > >> @@ -19,6 +19,7 @@ EXTRA_OECONF:append:libc-musl = " LIBS=-lfts " > >> # is set to -O0 or frame pointers have been enabled by > >> -fno-omit-frame-pointer > >> # earlier in CFLAGS, etc. > >> CFLAGS:append:x86-64 = " -fomit-frame-pointer" > >> +TUNE_CCARGS:remove:x86 = "-mfpmath=sse" > >> > >> CFLAGS:append:powerpc64 = " -D__SANE_USERSPACE_TYPES__" > >> CFLAGS:append:mipsarchn64 = " -D__SANE_USERSPACE_TYPES__" > > > > I really don't like remove operations in OE-Core. If it is > > incompatible, why is it there in the first place? Does that need to be > > clang only? > > There are some tests in ltp where it conflicts especially for tunes used > in qemux86, the test adds -mno-sse which does nullify -msse3 not nullify > -mfpmath=sse > > > cd tmp/work/core2-32-yoe-linux/ltp/20220527-r0/git/testcases/kernel/kvm > > % > ../../../../recipe-sysroot-native/usr/bin/i686-yoe-linux/i686-yoe-linux-clang > -target i686-yoe-linux -m32 -march=core2 -mtune=core2 -msse3 > -mfpmath=sse -mlittle-endian --dyld-prefix=/usr -Qunused-arguments > -Wl,-O1 -Wl,--hash-style=gnu -Wl,--as-needed > -fmacro-prefix-map=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0=/usr/src/debug/ltp/20220527-r0 > > -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0=/usr/src/debug/ltp/20220527-r0 > > -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0/recipe-sysroot= > > -fdebug-prefix-map=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0/recipe-sysroot-native= > -Wl,-z,relro,-z,now -O2 -D_FORTIFY_SOURCE=2 -Wformat > -Wformat-security -Werror=format-security > --sysroot=/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0/recipe-sysroot > -I/mnt/b/yoe/master/build/tmp/work/core2-32-yoe-linux/ltp/20220527-r0/git/testcases/kernel/kvm/include > -DCOMPILE_PAYLOAD -ffreestanding -O2 -Wall > -fno-asynchronous-unwind-tables -mno-mmx -mno-sse -fno-pie -c -o > lib_guest.o lib_guest.c > > > > > Cheers, > > > > Richard > >
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