makepkg: add rust support for *FLAGS and debug-prefix-map

The rust language supports $RUSTFLAGS to be used automatically in all
rustc invocations. Allow setting this in makepkg.conf (e.g. for
optimization or debuginfo support), and teach debug+strip to pass the
rustc command line argument necessary to rewrite source file paths in
the debugging symbols.

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>

4 files changed, 8 insertions, 6 deletions

diff --git a/scripts/libmakepkg/buildenv.sh.in b/scripts/libmakepkg/buildenv.sh.in
index 085e1380..48c95313 100644
--- a/scripts/libmakepkg/buildenv.sh.in
+++ b/scripts/libmakepkg/buildenv.sh.in
@@ -36,5 +36,5 @@ prepare_buildenv() {
 	done
 
 	# ensure all necessary build variables are exported
-	export CPPFLAGS CFLAGS CXXFLAGS LDFLAGS MAKEFLAGS CHOST
+	export CPPFLAGS CFLAGS CXXFLAGS LDFLAGS RUSTFLAGS MAKEFLAGS CHOST
 }
diff --git a/scripts/libmakepkg/buildenv/buildflags.sh.in b/scripts/libmakepkg/buildenv/buildflags.sh.in
index daccc9cc..85ee80fc 100644
--- a/scripts/libmakepkg/buildenv/buildflags.sh.in
+++ b/scripts/libmakepkg/buildenv/buildflags.sh.in
@@ -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
+		unset CPPFLAGS CFLAGS DEBUG_CFLAGS CXXFLAGS DEBUG_CXXFLAGS LDFLAGS RUSTFLAGS DEBUG_RUSTFLAGS
 	fi
 }
diff --git a/scripts/libmakepkg/buildenv/debugflags.sh.in b/scripts/libmakepkg/buildenv/debugflags.sh.in
index ce9c1556..4cd5d003 100644
--- a/scripts/libmakepkg/buildenv/debugflags.sh.in
+++ b/scripts/libmakepkg/buildenv/debugflags.sh.in
@@ -32,7 +32,9 @@ buildenv_debugflags() {
 	if check_option "debug" "y"; then
 		DEBUG_CFLAGS+=" -fdebug-prefix-map=$srcdir=${DBGSRCDIR:-/usr/src/debug}"
 		DEBUG_CXXFLAGS+=" -fdebug-prefix-map=$srcdir=${DBGSRCDIR:-/usr/src/debug}"
+		DEBUG_RUSTFLAGS+=" --remap-path-prefix=$srcdir=${DBGSRCDIR:-/usr/src/debug}"
 		CFLAGS+=" $DEBUG_CFLAGS"
 		CXXFLAGS+=" $DEBUG_CXXFLAGS"
+		RUSTFLAGS+=" $DEBUG_RUSTFLAGS"
 	fi
 }
diff --git a/scripts/libmakepkg/lint_config/variable.sh.in b/scripts/libmakepkg/lint_config/variable.sh.in
index b0b731dd..aa9f6c07 100644
--- a/scripts/libmakepkg/lint_config/variable.sh.in
+++ b/scripts/libmakepkg/lint_config/variable.sh.in
@@ -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 LDFLAGS DEBUG_CFLAGS
-	              DEBUG_CXXFLAGS 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 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