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>

1 files changed, 9 insertions, 0 deletions

diff --git a/doc/makepkg.conf.5.asciidoc b/doc/makepkg.conf.5.asciidoc
index 178a1f1c..b7496324 100644
--- a/doc/makepkg.conf.5.asciidoc
+++ b/doc/makepkg.conf.5.asciidoc
@@ -72,6 +72,10 @@ Options
 **CXXFLAGS=**"cxxflags"::
 	Flags used for the C++ compiler; see CFLAGS for more info.
 
+**RUSTFLAGS=**"rustflags"::
+	Flags used for the Rust compiler, similar in spirit to CFLAGS. Read
+	linkman:rustc[1] for more details on the available flags.
+
 **LDFLAGS=**"ldflags"::
 	Flags used for the linker. Several options may be specified with common
 	usage resembling ``-Wl,--hash-style=gnu''. Read ld(1) for more details on
@@ -89,6 +93,11 @@ Options
 **DEBUG_CXXFLAGS=**"debug_cxxflags"::
 	Debug flags used for the C++ compiler; see DEBUG_CFLAGS for more info.
 
+**DEBUG_RUSTFLAGS=**"debug_rustflags"::
+	Additional compiler flags appended to `RUSTFLAGS` for use in debugging.
+	Usually this would include: ``-C debuginfo=2''. Read linkman:rustc[1] for
+	more details on the available flags.
+
 **BUILDENV=(**!distcc !color !ccache check !sign**)**::
 	This array contains options that affect the build environment; the defaults
 	are shown here. All options should always be left in the array; to enable