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llvm: Add llvm-config wrapper to improve flags handling

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Add a wrapper for llvm-config which provides flags from the current envrionment
instead of the values hardcoded into llvm-native at compile time. Inspiration
taken from the wrapper in meta-clang but I had to totally rewrite it as:

* the TARGET_* prefixes weren't in our environment
* meson uses --libs --ldflags XXX which didn't work

(From OE-Core rev: 193ee1973f613b72f7f99660aecf652b07652d18)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Richard Purdie 2022-08-30 17:41:35 +01:00
parent 79cc8584e6
commit 13f8a86122
2 changed files with 52 additions and 0 deletions
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42
meta/recipes-devtools/llvm/llvm/llvm-config Normal file
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@ -0,0 +1,42 @@
#!/bin/bash
#
# Copyright OpenEmbedded Contributors
#
# SPDX-License-Identifier: MIT
#
# Wrap llvm-config since the native llvm-config will remap some values correctly
# if placed in the target sysroot but for flags, it would provide the native ones.
# Provide ours from the environment instead.
NEXT_LLVM_CONFIG="$(which -a llvm-config | sed -n 2p)"
if [[ $# == 0 ]]; then
exec "$NEXT_LLVM_CONFIG"
fi
remain=""
output=""
for arg in "$@"; do
case "$arg" in
--cppflags)
output="${output} ${CPPFLAGS}"
;;
--cflags)
output="${output} ${CFLAGS}"
;;
--cxxflags)
output="${output} ${CXXFLAGS}"
;;
--ldflags)
output="${output} ${LDFLAGS}"
;;
*)
remain="${remain} ${arg}"
;;
esac
done
if [ "${remain}" != "" ]; then
output="${output} "$("$NEXT_LLVM_CONFIG" ${remain})
fi
echo "${output}"

10
meta/recipes-devtools/llvm/llvm_git.bb
View File

@ -31,6 +31,7 @@ SRC_URI = "git://github.com/llvm/llvm-project.git;branch=${BRANCH};protocol=http
file://0006-llvm-TargetLibraryInfo-Undefine-libc-functions-if-th.patch;striplevel=2 \
file://0007-llvm-allow-env-override-of-exe-path.patch;striplevel=2 \
file://0001-AsmMatcherEmitter-sort-ClassInfo-lists-by-name-as-we.patch;striplevel=2 \
file://llvm-config \
"
UPSTREAM_CHECK_GITTAGREGEX = "llvmorg-(?P<pver>\d+(\.\d+)+)"
@ -124,6 +125,15 @@ do_install() {
do_install:class-native() {
install -D -m 0755 ${B}/bin/llvm-tblgen ${D}${bindir}/llvm-tblgen${PV}
install -D -m 0755 ${B}/bin/llvm-config ${D}${bindir}/llvm-config${PV}
ln -sf llvm-config${PV} ${D}${bindir}/llvm-config
}
SYSROOT_PREPROCESS_FUNCS:append:class-target = " llvm_sysroot_preprocess"
llvm_sysroot_preprocess() {
install -d ${SYSROOT_DESTDIR}${bindir_crossscripts}/
install -m 0755 ${WORKDIR}/llvm-config ${SYSROOT_DESTDIR}${bindir_crossscripts}/
ln -sf llvm-config ${SYSROOT_DESTDIR}${bindir_crossscripts}/llvm-config${PV}
}
PACKAGES =+ "${PN}-bugpointpasses ${PN}-llvmhello ${PN}-libllvm ${PN}-liboptremarks ${PN}-liblto"