diff options
| author | Sam James <sam@gentoo.org> | 2025-11-10 04:04:50 +0000 |
|---|---|---|
| committer | Sam James <sam@gentoo.org> | 2025-11-16 05:50:33 +0000 |
| commit | a4eae64aa24da57d3f6292768565ed3a4115c99a (patch) | |
| tree | 622d67ec33c37a7ef12023f3043af88add5fa436 /eclass | |
| parent | 4b8f97f30fff5579289f5ee16c7b0d42fae18625 (diff) | |
| download | gentoo-a4eae64aa24da57d3f6292768565ed3a4115c99a.tar.gz gentoo-a4eae64aa24da57d3f6292768565ed3a4115c99a.tar.bz2 gentoo-a4eae64aa24da57d3f6292768565ed3a4115c99a.zip | |
meson.eclass: support incremental LTO for GCC
Support -flto-incremental=/path/to/cache being used with GCC. Personally,
I am using this hook in /etc/portage/bashrc:
```
pre_src_configure() {
if [[ -n ${PORTAGE_LTO_CACHE} ]] ; then
local lto_path=/var/tmp/portage/lto/${CATEGORY}/${PN}
mkdir -p "${lto_path}"
export CFLAGS="${CFLAGS} -flto-incremental=${lto_path} -flto-compression-level=19"
export CXXFLAGS="${CXXFLAGS} -flto-incremental=${lto_path} -flto-compression-level=19"
export LDFLAGS="${LDFLAGS} -flto-incremental=${lto_path} -flto-compression-level=19"
fi
}
```
... and then `PORTAGE_LTO_CACHE=1` in my development environment.
Signed-off-by: Sam James <sam@gentoo.org>
Diffstat (limited to 'eclass')
| -rw-r--r-- | eclass/meson.eclass | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/eclass/meson.eclass b/eclass/meson.eclass index a2bc5537e458..06675e02b82b 100644 --- a/eclass/meson.eclass +++ b/eclass/meson.eclass @@ -1,4 +1,4 @@ -# Copyright 2017-2024 Gentoo Authors +# Copyright 2017-2025 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 # @ECLASS: meson.eclass @@ -305,6 +305,18 @@ setup_meson_src_configure() { MESONARGS+=( -Db_lto_threads=${v} ) ;; esac + + if has_version -b ">=dev-build/meson-1.10.0" ; then + local v=$(get-flag -flto-incremental=) + v=${v#-flto-incremental=} + if [[ ${v} ]] ; then + MESONARGS+=( + -Db_thinlto_cache=true + -Db_thinlto_cache_dir=${v} + ) + fi + fi + # finally, remove it from *FLAGS to avoid passing it: # - twice, with potentially different values # - on excluded targets |