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sys-libs/libcxx: Try building with -nodefaultlibs for bootstrap

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Add a hack that appends -nodefaultlibs if the C++ compiler fails to link
software otherwise. This is based on what we do in sys-libs/compiler-rt
already and it should make it possible to bootstrap libc++ on systems
without C++ standard library.
This commit is contained in:
Michał Górny
2018-03-10 00:05:14 +01:00
parent 3c93f9d2a1
commit 54a35a5810
3 changed files with 42 additions and 0 deletions
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14
sys-libs/libcxx/libcxx-6.0.0.ebuild
View File

@@ -73,6 +73,11 @@ pkg_setup() {
fi
}
test_compiler() {
$(tc-getCXX) ${CXXFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c++ - \
<<<'int main() { return 0; }' &>/dev/null
}
multilib_src_configure() {
local cxxabi cxxabi_incs
if use libcxxabi; then
@@ -109,6 +114,15 @@ multilib_src_configure() {
fi
fi
# bootstrap: cmake is unhappy if compiler can't link to stdlib
local nolib_flags=( -nodefaultlibs -lc )
if ! test_compiler; then
if test_compiler "${nolib_flags[@]}"; then
local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
ewarn "${CXX} seems to lack runtime, trying with ${nolib_flags[*]}"
fi
fi
local libdir=$(get_libdir)
local mycmakeargs=(
-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}

14
sys-libs/libcxx/libcxx-6.0.9999.ebuild
View File

@@ -85,6 +85,11 @@ pkg_setup() {
fi
}
test_compiler() {
$(tc-getCXX) ${CXXFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c++ - \
<<<'int main() { return 0; }' &>/dev/null
}
multilib_src_configure() {
local cxxabi cxxabi_incs
if use libcxxabi; then
@@ -121,6 +126,15 @@ multilib_src_configure() {
fi
fi
# bootstrap: cmake is unhappy if compiler can't link to stdlib
local nolib_flags=( -nodefaultlibs -lc )
if ! test_compiler; then
if test_compiler "${nolib_flags[@]}"; then
local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
ewarn "${CXX} seems to lack runtime, trying with ${nolib_flags[*]}"
fi
fi
local libdir=$(get_libdir)
local mycmakeargs=(
-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}

14
sys-libs/libcxx/libcxx-9999.ebuild
View File

@@ -84,6 +84,11 @@ pkg_setup() {
fi
}
test_compiler() {
$(tc-getCXX) ${CXXFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c++ - \
<<<'int main() { return 0; }' &>/dev/null
}
multilib_src_configure() {
local cxxabi cxxabi_incs
if use libcxxabi; then
@@ -120,6 +125,15 @@ multilib_src_configure() {
fi
fi
# bootstrap: cmake is unhappy if compiler can't link to stdlib
local nolib_flags=( -nodefaultlibs -lc )
if ! test_compiler; then
if test_compiler "${nolib_flags[@]}"; then
local -x LDFLAGS="${LDFLAGS} ${nolib_flags[*]}"
ewarn "${CXX} seems to lack runtime, trying with ${nolib_flags[*]}"
fi
fi
local libdir=$(get_libdir)
local mycmakeargs=(
-DLIBCXX_LIBDIR_SUFFIX=${libdir#lib}