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7f9ace99e7
when called with "-fopenmp" and "-nostdlib", clang won't add "-lomp"
automatically, while gcc always add "-lgomp". See below:
For gcc, "-lgomp" is added always:
# echo 'int main() { return 0; }' | gcc -fopenmp -v -x c - 2>&1 | grep -- "-lgomp"
/usr/libexec/gcc/x86_64-pc-linux-gnu/14/collect2 -plugin ... -lgomp -lgcc ...
# echo 'int main() { return 0; }' | gcc -fopenmp -nostdlib -v -x c - 2>&1 | grep -- "-lgomp"
/usr/libexec/gcc/x86_64-pc-linux-gnu/14/collect2 -plugin ... -lgomp
For clang, "-lomp" is not added when both "-fopenmp" and "-nostdlib" exist:
# echo 'int main() { return 0; }' | clang -fopenmp -v -x c - 2>&1 | grep -- "-lomp"
"/usr/bin/x86_64-pc-linux-gnu-ld.bfd" --hash-style=gnu ... -lomp -L/usr/lib/llvm/19/lib64 ...
# echo 'int main() { return 0; }' | clang -fopenmp -nostdlib -v -x c - 2>&1 | grep -- "-lomp"
In case of libsoundtouch, command to build .so is:
clang++ -fPIC -DPIC -shared -nostdlib ... -Wl,-soname -Wl,libSoundTouchDll.so.1 -o .libs/libSoundTouchDll.so.1.0.0
So LDFLAGS "-lomp" is needed if compiler is clang and openmp is enabled.
Otherwise, libomp.so won't be defined in Dynamic Section as show bellow:
# LC_ALL=C objdump -x /usr/lib64/libSoundTouch.so
...
Dynamic Section:
NEEDED libomp.so
...
cause package depend on libsoundtouch either failed to build or failed
to start (if libsoundtouch is reemerged with openmp).
Closes: https://bugs.gentoo.org/740310
Signed-off-by: Z. Liu <zhixu.liu@gmail.com>
Closes: https://github.com/gentoo/gentoo/pull/40424
Signed-off-by: Sam James <sam@gentoo.org>
63 lines
1.5 KiB
Bash
63 lines
1.5 KiB
Bash
# Copyright 1999-2025 Gentoo Authors
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# Distributed under the terms of the GNU General Public License v2
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EAPI=8
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inherit autotools flag-o-matic multilib-minimal toolchain-funcs
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MY_PN=${PN/lib}
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MY_P=${MY_PN}-${PV}
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DESCRIPTION="Audio processing library for changing tempo, pitch and playback rates"
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HOMEPAGE="https://www.surina.net/soundtouch/ https://codeberg.org/soundtouch/soundtouch"
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SRC_URI="https://www.surina.net/${MY_PN}/${MY_P}.tar.gz"
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S="${WORKDIR}/${MY_PN}"
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LICENSE="LGPL-2.1"
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# subslot = libSoundTouch.so soname
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SLOT="0/1"
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KEYWORDS="amd64 ~arm ~arm64 ~hppa ~loong ~mips ppc ppc64 ~riscv x86 ~amd64-linux ~x86-linux ~ppc-macos"
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IUSE="cpu_flags_x86_sse openmp static-libs"
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BDEPEND="virtual/pkgconfig"
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pkg_pretend() {
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[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
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}
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pkg_setup() {
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[[ ${MERGE_TYPE} != binary ]] && use openmp && tc-check-openmp
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}
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src_prepare() {
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default
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sed -i "s:^\(dist_doc_DATA=\)COPYING.TXT :\1:" Makefile.am || die
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if tc-is-clang && use openmp ; then
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append-libs omp
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fi
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eautoreconf
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}
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multilib_src_configure() {
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local myeconfargs=(
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--enable-shared
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--disable-integer-samples
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$(use_enable cpu_flags_x86_sse x86-optimizations)
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$(use_enable openmp)
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$(use_enable static-libs static)
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)
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ECONF_SOURCE="${S}" econf "${myeconfargs[@]}"
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}
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multilib_src_compile() {
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emake CFLAGS="${CFLAGS}" CXXFLAGS="${CXXFLAGS}"
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}
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multilib_src_install() {
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emake DESTDIR="${D}" pkgdocdir="${EPREFIX}"/usr/share/doc/${PF}/html install
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}
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multilib_src_install_all() {
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find "${ED}" -name '*.la' -delete || die
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}
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