On Mon, Feb 26, 2024 at 2:32 PM Martin Jansa via
lists.openembedded.org <[email protected]>
wrote:
>
> * on some hosts (e.g. on my gentoo after recent update) it detects OpenMP in
> do_configure:
> Run-time dependency OpenMP found: YES 4.5
> but then fails in do_compile as shown in:
> http://errors.yoctoproject.org/Errors/Details/754632/
>
> gcc -o test/fetch-test test/fetch-test.p/fetch-test.c.o
> -LTOPDIR/tmp-glibc/work/x86_64-linux/pixman-native/0.42.2/recipe-sysroot-native/usr/lib
>
> -LTOPDIR/tmp-glibc/work/x86_64-linux/pixman-native/0.42.2/recipe-sysroot-native/lib
> -Wl,--as-needed -Wl,--no-undefined -Wl,--enable-new-dtags
> -Wl,-rpath-link,TOPDIR/tmp-glibc/work/x86_64-linux/pixman-native/0.42.2/recipe-sysroot-native/usr/lib
>
> -Wl,-rpath-link,TOPDIR/tmp-glibc/work/x86_64-linux/pixman-native/0.42.2/recipe-sysroot-native/lib
>
> -Wl,-rpath,TOPDIR/tmp-glibc/work/x86_64-linux/pixman-native/0.42.2/recipe-sysroot-native/usr/lib
>
> -Wl,-rpath,TOPDIR/tmp-glibc/work/x86_64-linux/pixman-native/0.42.2/recipe-sysroot-native/lib
> -Wl,-O1 '-Wl,-rpath,$ORIGIN/../pixman'
> -Wl,-rpath-link,TOPDIR/tmp-glibc/work/x86_64-linux/pixman-native/0.42.2/build/pixman
> -Wl,--start-group test/libtestutils.a pixman/libpixman-1.so.0.42.2 -pthread
> -fopenmp -fopenmp -lm -Wl,--end-group
> gcc: fatal error: cannot read spec file ‘libgomp.spec’: No such file or
> directory
> compilation terminated.
>
> it's only used in tests, so should be safe to disable for native builds
>
> * the check in meson uses /usr/include/omp.h which is provided by libomp
> even when openmp support is disabled in native gcc in gentoo this happned
> after switching from 17.1 profile to 23.0 which doesn't include openmp
> USE flag by default, if you later run depclean it will uninstall libomp
> as well which will fix this conflict in meson's OpenMP autodetection
Just FYI, even after uninstalling libomp you will get do_package failures like:
recipe-sysroot-native/usr/lib/rpm/rpmdeps: error while loading shared
libraries: libgomp.so.1: cannot open shared object file: No such file
or directory
until you manually cleansstate rpm-native to rebuild it without openmp
support (and you need to make sure not to re-use rpm-native from
sstate built on some other host with openmp enabled).
And rebuilding rpm-native without openmp support on host will
currently fail with:
| CMake Error at
/OE/build/tmp-glibc/work/x86_64-linux/rpm-native/4.19.1/recipe-sysroot-native/usr/share/cmake-3.28/Modules/FindPackageHandleStandardArgs.cmake:230
(message):
| Could NOT find OpenMP_C (missing: OpenMP_C_FLAGS OpenMP_C_LIB_NAMES)
| (Required is at least version "4.5")
I'm not sure why openmp ended disabled in 23.0 gentoo profile, looks
like it should still be enabled through make.defaults even for 23.0:
/usr/portage/profiles/releases/17.0/make.defaults:USE="${USE} fortran openmp"
/usr/portage/profiles/use.desc:openmp - Build support for the OpenMP
(support parallel computing), requires >=sys-devel/gcc-4.2 built with
USE="openmp"
/usr/portage/profiles/prefix/linux/make.defaults:USE="${USE} openmp"
might be temporary issue as 23.0 profile is experimental and not for production:
https://wiki.gentoo.org/wiki/Project:Toolchain/23.0_profile_transition
Regards,
> Signed-off-by: Martin Jansa <[email protected]>
> ---
> meta/recipes-graphics/xorg-lib/pixman_0.42.2.bb | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/meta/recipes-graphics/xorg-lib/pixman_0.42.2.bb
> b/meta/recipes-graphics/xorg-lib/pixman_0.42.2.bb
> index 8a93f8c0fe..23ae0cbb27 100644
> --- a/meta/recipes-graphics/xorg-lib/pixman_0.42.2.bb
> +++ b/meta/recipes-graphics/xorg-lib/pixman_0.42.2.bb
> @@ -40,6 +40,8 @@ EXTRA_OEMESON:append:class-target:powerpc64le = "
> ${@bb.utils.contains("TUNE_FEA
> EXTRA_OEMESON:append:armv7a =
> "${@bb.utils.contains("TUNE_FEATURES","neon",""," -Dneon=disabled",d)}"
> EXTRA_OEMESON:append:armv7ve =
> "${@bb.utils.contains("TUNE_FEATURES","neon",""," -Dneon=disabled",d)}"
>
> +EXTRA_OEMESON:append:class-native = " -Dopenmp=disabled"
> +
> BBCLASSEXTEND = "native nativesdk"
>
> CVE_STATUS[CVE-2023-37769] = "not-applicable-config: stress-test is an
> uninstalled test"
> --
> 2.44.0
>
>
>
>
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