makepkg: add the $startdir to package .BUILDINFO

This value is needed for reproducible builds. The reason is because
$BUILDDIR changes its behavior depending on whether it is the same as
$startdir, and the result is that we cannot know whether $srcdir (the
path that is potentially embedded into the final package) is actually
"$BUILDDIR/src" or "$BUILDDIR/$pkgbase/src".

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

1 files changed, 3 insertions, 0 deletions

diff --git a/doc/BUILDINFO.5.asciidoc b/doc/BUILDINFO.5.asciidoc
index 3db1e12f..bb300e18 100644
--- a/doc/BUILDINFO.5.asciidoc
+++ b/doc/BUILDINFO.5.asciidoc
@@ -53,6 +53,9 @@ BUILDINFO file format.
 *builddir*::
 	The directory where the package was built.
 
+*startdir*::
+	The directory from which makepkg was executed.
+
 *buildenv (array)*::
 	The build environment specified in makepkg.conf.