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debugflags: ensure to only append debug flags once when building

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During a package build we call prepare_buildenv in multiple stages of
the process. For debug packages, one of the hooks is buildenv_debugflags
which populates the debug flags to the according variables.

The issue is that the behavior of the current implementation of
buildenv_debugflags is not idempotent, so consecutive calls will append
the same flags again. In certain cases this isn't an issue, however
for context aware build frontends like cargo any change of the build
inputs leads to a fresh build. This means that any invocation of such
a build ecosystem inside the package() function will trigger a full
rebuild, which is not desired.

To fix this issue, this commit makes buildenv_debugflags idempotent
by only appending flags once to the target variables.

Signed-off-by: Levente Polyak <anthraxx@archlinux.org>
This commit is contained in:
Levente Polyak 2022-11-08 20:32:52 +01:00 • committed by Levente Polyak
parent 0108e2c64e
commit 18e49f2c97
No known key found for this signature in database
GPG key ID: FC1B547C8D8172C8
4 changed files with 22 additions and 9 deletions
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9
scripts/libmakepkg/buildenv/debugflags.sh.in
View file

@ -25,14 +25,15 @@ LIBMAKEPKG_BUILDENV_DEBUGFLAGS_SH=1
MAKEPKG_LIBRARY=${MAKEPKG_LIBRARY:-'@libmakepkgdir@'}
source "$MAKEPKG_LIBRARY/util/option.sh"
source "$MAKEPKG_LIBRARY/util/util.sh"
buildenv_functions+=('buildenv_debugflags')
buildenv_debugflags() {
if check_option "debug" "y" && ! check_option "buildflags" "n"; then
DEBUG_CFLAGS+=" -ffile-prefix-map=$srcdir=${DBGSRCDIR:-/usr/src/debug}/${pkgbase}"
DEBUG_CXXFLAGS+=" -ffile-prefix-map=$srcdir=${DBGSRCDIR:-/usr/src/debug}/${pkgbase}"
CFLAGS+=" $DEBUG_CFLAGS"
CXXFLAGS+=" $DEBUG_CXXFLAGS"
append_once DEBUG_CFLAGS "-ffile-prefix-map=$srcdir=${DBGSRCDIR:-/usr/src/debug}/${pkgbase}"
append_once DEBUG_CXXFLAGS "-ffile-prefix-map=$srcdir=${DBGSRCDIR:-/usr/src/debug}/${pkgbase}"
append_once CFLAGS "$DEBUG_CFLAGS"
append_once CXXFLAGS "$DEBUG_CXXFLAGS"
fi
}

7
scripts/libmakepkg/buildenv/lto.sh.in
View file

@ -25,14 +25,15 @@ LIBMAKEPKG_BUILDENV_LTO_SH=1
MAKEPKG_LIBRARY=${MAKEPKG_LIBRARY:-'@libmakepkgdir@'}
source "$MAKEPKG_LIBRARY/util/option.sh"
source "$MAKEPKG_LIBRARY/util/util.sh"
build_options+=('lto')
buildenv_functions+=('buildenv_lto')
buildenv_lto() {
if check_option "lto" "y" && ! check_option "buildflags" "n"; then
CFLAGS+=" ${LTOFLAGS:--flto}"
CXXFLAGS+=" ${LTOFLAGS:--flto}"
LDFLAGS+=" ${LTOFLAGS:--flto}"
append_once CFLAGS "${LTOFLAGS:--flto}"
append_once CXXFLAGS "${LTOFLAGS:--flto}"
append_once LDFLAGS "${LTOFLAGS:--flto}"
fi
}

5
scripts/libmakepkg/buildenv/rust.sh.in
View file

@ -24,13 +24,14 @@ LIBMAKEPKG_BUILDENV_RUST_SH=1
MAKEPKG_LIBRARY=${MAKEPKG_LIBRARY:-'@libmakepkgdir@'}
source "$MAKEPKG_LIBRARY/util/option.sh"
source "$MAKEPKG_LIBRARY/util/util.sh"
buildenv_var+=('RUSTFLAGS' 'DEBUG_RUSTFLAGS')
buildenv_functions+=('buildenv_rust')
buildenv_rust() {
if check_option "debug" "y" && ! check_option "buildflags" "n"; then
DEBUG_RUSTFLAGS+=" --remap-path-prefix=$srcdir=${DBGSRCDIR:-/usr/src/debug}/${pkgbase}"
RUSTFLAGS+=" $DEBUG_RUSTFLAGS"
append_once DEBUG_RUSTFLAGS "--remap-path-prefix=$srcdir=${DBGSRCDIR:-/usr/src/debug}/${pkgbase}"
append_once RUSTFLAGS "$DEBUG_RUSTFLAGS"
fi
}

10
scripts/libmakepkg/util/util.sh.in
View file

@ -112,3 +112,13 @@ source_safe() {
eval "$shellopts"
}
# Append a string to a variable if the value is not already contained.
# usage : append_once( $ref, $value )
append_once() {
local -n var=$1
local value=$2
if [[ ! $var =~ (^| )"$value"($| ) ]]; then
var+=" $value"
fi
}