1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
|
# Copyright 1999-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=7
PYTHON_COMPAT=( python3_{6,7} )
inherit cmake-multilib llvm llvm.org multiprocessing python-any-r1 \
toolchain-funcs
DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
HOMEPAGE="https://libcxx.llvm.org/"
LLVM_COMPONENTS=( libcxx )
llvm.org_set_globals
LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="0"
KEYWORDS="amd64 arm arm64 ~x86"
IUSE="elibc_glibc elibc_musl +libcxxabi +libunwind +static-libs test"
REQUIRED_USE="libunwind? ( libcxxabi )"
RESTRICT="!test? ( test )"
RDEPEND="
libcxxabi? ( ~sys-libs/libcxxabi-${PV}[libunwind=,static-libs?,${MULTILIB_USEDEP}] )
!libcxxabi? ( >=sys-devel/gcc-4.7:=[cxx] )"
# llvm-6 for new lit options
# clang-3.9.0 installs necessary target symlinks unconditionally
# which removes the need for MULTILIB_USEDEP
DEPEND="${RDEPEND}
>=sys-devel/llvm-6"
BDEPEND="
test? ( >=sys-devel/clang-3.9.0
$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]') )"
DOCS=( CREDITS.TXT )
PATCHES=(
# Add link flag "-Wl,-z,defs" to avoid underlinking; this is needed in a
# out-of-tree build.
"${FILESDIR}/${PN}-3.9-cmake-link-flags.patch"
)
# least intrusive of all
CMAKE_BUILD_TYPE=RelWithDebInfo
python_check_deps() {
has_version "dev-python/lit[${PYTHON_USEDEP}]"
}
pkg_setup() {
llvm_pkg_setup
use test && python-any-r1_pkg_setup
if ! use libcxxabi && ! tc-is-gcc ; then
eerror "To build ${PN} against libsupc++, you have to use gcc. Other"
eerror "compilers are not supported. Please set CC=gcc and CXX=g++"
eerror "and try again."
die
fi
}
test_compiler() {
$(tc-getCXX) ${CXXFLAGS} ${LDFLAGS} "${@}" -o /dev/null -x c++ - \
<<<'int main() { return 0; }' &>/dev/null
}
src_configure() {
# note: we need to do this before multilib kicks in since it will
# alter the CHOST
local cxxabi cxxabi_incs
if use libcxxabi; then
cxxabi=libcxxabi
cxxabi_incs="${EPREFIX}/usr/include/libcxxabi"
else
local gcc_inc="${EPREFIX}/usr/lib/gcc/${CHOST}/$(gcc-fullversion)/include/g++-v$(gcc-major-version)"
cxxabi=libsupc++
cxxabi_incs="${gcc_inc};${gcc_inc}/${CHOST}"
fi
multilib-minimal_src_configure
}
multilib_src_configure() {
# we want -lgcc_s for unwinder, and for compiler runtime when using
# gcc, clang with gcc runtime (or any unknown compiler)
local extra_libs=() want_gcc_s=ON want_compiler_rt=OFF
if use libunwind; then
# work-around missing -lunwind upstream
extra_libs+=( -lunwind )
# if we're using libunwind and clang with compiler-rt, we want
# to link to compiler-rt instead of -lgcc_s
if tc-is-clang; then
local compiler_rt=$($(tc-getCC) ${CFLAGS} ${CPPFLAGS} \
${LDFLAGS} -print-libgcc-file-name)
if [[ ${compiler_rt} == *libclang_rt* ]]; then
want_gcc_s=OFF
want_compiler_rt=ON
extra_libs+=( "${compiler_rt}" )
fi
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=${libdir#lib}
-DLIBCXX_ENABLE_SHARED=ON
-DLIBCXX_ENABLE_STATIC=$(usex static-libs)
-DLIBCXX_CXX_ABI=${cxxabi}
-DLIBCXX_CXX_ABI_INCLUDE_PATHS=${cxxabi_incs}
# we're using our own mechanism for generating linker scripts
-DLIBCXX_ENABLE_ABI_LINKER_SCRIPT=OFF
-DLIBCXX_HAS_MUSL_LIBC=$(usex elibc_musl)
-DLIBCXX_HAS_GCC_S_LIB=${want_gcc_s}
-DLIBCXX_INCLUDE_TESTS=$(usex test)
-DLIBCXX_USE_COMPILER_RT=${want_compiler_rt}
-DCMAKE_SHARED_LINKER_FLAGS="${extra_libs[*]} ${LDFLAGS}"
)
if use test; then
local clang_path=$(type -P "${CHOST:+${CHOST}-}clang" 2>/dev/null)
local jobs=${LIT_JOBS:-$(makeopts_jobs "${MAKEOPTS}" "$(get_nproc)")}
[[ -n ${clang_path} ]] || die "Unable to find ${CHOST}-clang for tests"
mycmakeargs+=(
-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
-DLLVM_LIT_ARGS="-vv;-j;${jobs};--param=cxx_under_test=${clang_path}"
)
fi
cmake-utils_src_configure
}
multilib_src_test() {
local -x LIT_PRESERVES_TMP=1
cmake-utils_src_make check-libcxx
}
# Usage: deps
gen_ldscript() {
local output_format
output_format=$($(tc-getCC) ${CFLAGS} ${LDFLAGS} -Wl,--verbose 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
[[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
cat <<-END_LDSCRIPT
/* GNU ld script
Include missing dependencies
*/
${output_format}
GROUP ( $@ )
END_LDSCRIPT
}
gen_static_ldscript() {
local libdir=$(get_libdir)
local cxxabi_lib=$(usex libcxxabi "libc++abi.a" "libsupc++.a")
# Move it first.
mv "${ED}/usr/${libdir}/libc++.a" "${ED}/usr/${libdir}/libc++_static.a" || die
# Generate libc++.a ldscript for inclusion of its dependencies so that
# clang++ -stdlib=libc++ -static works out of the box.
local deps="libc++_static.a ${cxxabi_lib} $(usex libunwind libunwind.a libgcc_eh.a)"
# On Linux/glibc it does not link without libpthread or libdl. It is
# fine on FreeBSD.
use elibc_glibc && deps+=" libpthread.a libdl.a"
gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.a" || die
}
gen_shared_ldscript() {
local libdir=$(get_libdir)
# libsupc++ doesn't have a shared version
local cxxabi_lib=$(usex libcxxabi "libc++abi.so" "libsupc++.a")
mv "${ED}/usr/${libdir}/libc++.so" "${ED}/usr/${libdir}/libc++_shared.so" || die
local deps="libc++_shared.so ${cxxabi_lib} $(usex libunwind libunwind.so libgcc_s.so)"
gen_ldscript "${deps}" > "${ED}/usr/${libdir}/libc++.so" || die
}
multilib_src_install() {
cmake-utils_src_install
gen_shared_ldscript
use static-libs && gen_static_ldscript
}
pkg_postinst() {
elog "This package (${PN}) is mainly intended as a replacement for the C++"
elog "standard library when using clang."
elog "To use it, instead of libstdc++, use:"
elog " clang++ -stdlib=libc++"
elog "to compile your C++ programs."
}
|
GitWeb