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
201
202
203
204
|
# Copyright 1999-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
PYTHON_COMPAT=( python3_{9..11} )
inherit cmake-multilib flag-o-matic llvm llvm.org python-any-r1 \
toolchain-funcs
DESCRIPTION="New implementation of the C++ standard library, targeting C++11"
HOMEPAGE="https://libcxx.llvm.org/"
LICENSE="Apache-2.0-with-LLVM-exceptions || ( UoI-NCSA MIT )"
SLOT="0"
KEYWORDS="~loong"
IUSE="+clang +libcxxabi static-libs test"
REQUIRED_USE="test? ( clang )"
RESTRICT="!test? ( test )"
RDEPEND="
libcxxabi? (
~sys-libs/libcxxabi-${PV}[static-libs?,${MULTILIB_USEDEP}]
)
!libcxxabi? ( >=sys-devel/gcc-4.7:=[cxx] )
"
DEPEND="
${RDEPEND}
sys-devel/llvm:${LLVM_MAJOR}
"
BDEPEND="
clang? (
sys-devel/clang:${LLVM_MAJOR}
)
!test? (
${PYTHON_DEPS}
)
test? (
>=dev-util/cmake-3.16
sys-devel/gdb[python]
$(python_gen_any_dep 'dev-python/lit[${PYTHON_USEDEP}]')
)
"
LLVM_COMPONENTS=( runtimes libcxx{,abi} llvm/{cmake,utils/llvm-lit} cmake )
llvm.org_set_globals
python_check_deps() {
use test || return 0
python_has_version "dev-python/lit[${PYTHON_USEDEP}]"
}
pkg_setup() {
# Darwin Prefix builds do not have llvm installed yet, so rely on
# bootstrap-prefix to set the appropriate path vars to LLVM instead
# of using llvm_pkg_setup.
if [[ ${CHOST} != *-darwin* ]] || has_version dev-lang/llvm; then
LLVM_MAX_SLOT=${LLVM_MAJOR} llvm_pkg_setup
fi
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=system-libcxxabi
cxxabi_incs="${EPREFIX}/usr/include/c++/v1"
else
local gcc_inc="${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() {
if use clang; then
local -x CC=${CHOST}-clang
local -x CXX=${CHOST}-clang++
strip-unsupported-flags
fi
# link to compiler-rt
local use_compiler_rt=OFF
[[ $(tc-get-c-rtlib) == compiler-rt ]] && use_compiler_rt=ON
# bootstrap: cmake is unhappy if compiler can't link to stdlib
local nolib_flags=( -nodefaultlibs -lc )
if ! test_compiler; then
if test_compiler "${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=(
-DCMAKE_CXX_COMPILER_TARGET="${CHOST}"
-DPython3_EXECUTABLE="${PYTHON}"
-DLLVM_ENABLE_RUNTIMES=libcxx
-DLLVM_INCLUDE_TESTS=OFF
-DLLVM_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=$(usex elibc_musl)
-DLIBCXX_INCLUDE_BENCHMARKS=OFF
-DLIBCXX_INCLUDE_TESTS=$(usex test)
-DLIBCXX_USE_COMPILER_RT=${use_compiler_rt}
)
if use test; then
mycmakeargs+=(
-DLLVM_EXTERNAL_LIT="${EPREFIX}/usr/bin/lit"
-DLLVM_LIT_ARGS="$(get_lit_flags)"
-DPython3_EXECUTABLE="${PYTHON}"
)
fi
cmake_src_configure
}
multilib_src_compile() {
cmake_src_compile
if [[ ${CHOST} != *-darwin* ]] ; then
gen_shared_ldscript
use static-libs && gen_static_ldscript
fi
}
multilib_src_test() {
local -x LIT_PRESERVES_TMP=1
cmake_build check-cxx
}
multilib_src_install() {
cmake_src_install
# since we've replaced libc++.{a,so} with ldscripts, now we have to
# install the extra symlinks
if [[ ${CHOST} != *-darwin* ]] ; then
dolib.so lib/libc++_shared.so
use static-libs && dolib.a lib/libc++_static.a
fi
}
# Usage: deps
gen_ldscript() {
local output_format
output_format=$($(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() {
# Move it first.
mv lib/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
$(usex libcxxabi libc++abi.a libsupc++.a)
)
# On Linux/glibc it does not link without libpthread or libdl. It is
# fine on FreeBSD.
use elibc_glibc && deps+=( libpthread.a libdl.a )
gen_ldscript "${deps[*]}" > lib/libc++.a || die
}
gen_shared_ldscript() {
# Move it first.
mv lib/libc++{,_shared}.so || die
local deps=(
libc++_shared.so
# libsupc++ doesn't have a shared version
$(usex libcxxabi libc++abi.so libsupc++.a)
)
gen_ldscript "${deps[*]}" > lib/libc++.so || die
}
|
GitWeb