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Make link time optimization flags configurable

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We want to use -flto=auto in Arch Linux to speed up building, but we
can't hardcode it in buildenv/lto.sh because other downstreams might
have clang < 13.0.0 which did not recognize -flto=auto as equivalent
to -flto=full.

Introducing an LTOFLAGS variable to makepkg.conf seems the way to go.

Signed-off-by: Allan McRae <allan@archlinux.org>
This commit is contained in:
Evangelos Foutras 2022-02-10 05:15:01 +02:00 • committed by Allan McRae
parent 49b08fa9d1
commit e1ce2351f5
5 changed files with 17 additions and 10 deletions
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10
doc/makepkg.conf.5.asciidoc
View file

@ -81,6 +81,11 @@ Options
usage resembling ``-Wl,--hash-style=gnu''. Read ld(1) for more details on
available linker flags.
**LTOFLAGS=**"ltoflags"::
Additional compiler and linker flags appended to `CFLAGS`, `CXXFLAGS`
and `LDFLAGS` when building with link time optimization. If empty,
``-flto'' is used.
**MAKEFLAGS=**"makeflags"::
This is often used to set the number of jobs used; for example, `-j2`.
Other flags that make accepts can also be passed.
@ -190,8 +195,9 @@ Options
package containing the debug symbols when used with `strip'.
*lto*;;
Enable building packages using link time optimization. Adds '-flto'
to both CFLAGS and CXXFLAGS.
Enable building packages using link time optimization. Adds the
flags specified in LTOFLAGS to CFLAGS, CXXFLAGS and LDFLAGS (or
``-flto'' if LTOFLAGS is empty).
*autodep*;;
Enable the automatic addition of libraries to the depends and

1
etc/makepkg.conf.in
View file

@ -41,6 +41,7 @@ CHOST="@CHOST@"
#CFLAGS="-O2 -pipe"
#CXXFLAGS="-O2 -pipe"
#LDFLAGS=""
#LTOFLAGS="-flto"
#RUSTFLAGS="-C opt-level=2"
#-- Make Flags: change this for DistCC/SMP systems
#MAKEFLAGS="-j2"

2
scripts/libmakepkg/buildenv/buildflags.sh.in
View file

@ -30,6 +30,6 @@ buildenv_functions+=('buildenv_buildflags')
buildenv_buildflags() {
if check_option "buildflags" "n"; then
unset CPPFLAGS CFLAGS DEBUG_CFLAGS CXXFLAGS DEBUG_CXXFLAGS LDFLAGS RUSTFLAGS DEBUG_RUSTFLAGS
unset CPPFLAGS CFLAGS DEBUG_CFLAGS CXXFLAGS DEBUG_CXXFLAGS LDFLAGS LTOFLAGS RUSTFLAGS DEBUG_RUSTFLAGS
fi
}

6
scripts/libmakepkg/buildenv/lto.sh.in
View file

@ -31,8 +31,8 @@ buildenv_functions+=('buildenv_lto')
buildenv_lto() {
if check_option "lto" "y" && ! check_option "buildflags" "n"; then
CFLAGS+=" -flto"
CXXFLAGS+=" -flto"
LDFLAGS+=" -flto"
CFLAGS+=" ${LTOFLAGS:--flto}"
CXXFLAGS+=" ${LTOFLAGS:--flto}"
LDFLAGS+=" ${LTOFLAGS:--flto}"
fi
}

8
scripts/libmakepkg/lint_config/variable.sh.in
View file

@ -32,10 +32,10 @@ lint_config_variables() {
local array=(DLAGENTS VCSCLIENTS BUILDENV OPTIONS INTEGRITY_CHECK MAN_DIRS
DOC_DIRS PURGE_TARGETS COMPRESSGZ COMPRESSBZ2 COMPRESSXZ
COMPRESSLRZ COMPRESSLZO COMPRESSZ)
local string=(CARCH CHOST CPPFLAGS CFLAGS CXXFLAGS RUSTFLAGS LDFLAGS DEBUG_CFLAGS
DEBUG_CXXFLAGS DEBUG_RUSTFLAGS DISTCC_HOSTS BUILDDIR STRIP_BINARIES
STRIP_SHARED STRIP_STATIC PKGDEST SRCDEST SRCPKGDEST LOGDEST PACKAGER
GPGKEY PKGEXT SRCEXT)
local string=(CARCH CHOST CPPFLAGS CFLAGS CXXFLAGS RUSTFLAGS LDFLAGS LTOFLAGS
DEBUG_CFLAGS DEBUG_CXXFLAGS DEBUG_RUSTFLAGS DISTCC_HOSTS BUILDDIR
STRIP_BINARIES STRIP_SHARED STRIP_STATIC PKGDEST SRCDEST SRCPKGDEST
LOGDEST PACKAGER GPGKEY PKGEXT SRCEXT)
local i keys ret=0