makepkg: allow specifying alternative build directory

Add a BUILDDIR variable (which can be overridden in the environment)
to specify an alternative location for building the package. This is
useful for people who want to build on a different filesystem for
improved performance (e.g. tmpfs).

Signed-off-by: Allan McRae <allan@archlinux.org>
Signed-off-by: Dan McGee <dan@archlinux.org>

2 files changed, 11 insertions, 0 deletions

diff --git a/doc/makepkg.8.txt b/doc/makepkg.8.txt
index e61f7ab3..f15226ac 100644
--- a/doc/makepkg.8.txt
+++ b/doc/makepkg.8.txt
@@ -206,6 +206,9 @@ Environment Variables
 	Folder where the downloaded sources will be stored. Overrides the
 	corresponding value defined in linkman:makepkg.conf[5].
 
+**BUILDDIR=**"/path/to/folder"::
+	Folder where the package will be built. Overrides the corresponding
+	value defined in linkman:makepkg.conf[5].
 
 Configuration
 -------------
diff --git a/doc/makepkg.conf.5.txt b/doc/makepkg.conf.5.txt
index 48f5ef56..aa0174cb 100644
--- a/doc/makepkg.conf.5.txt
+++ b/doc/makepkg.conf.5.txt
@@ -110,6 +110,14 @@ Options
 	running in the DistCC cluster. In addition, you will want to modify your
 	`MAKEFLAGS`.
 
+**BUILDDIR=**"/path/to/folder"::
+	If this value is not set, packages will by default be built in
+	subdirectories of the directory that makepkg is called from.  This
+	option allows setting the build location to another folder.
+	Incorrect use of `$startdir` in a PKGBUILD may cause building with
+	this option to fail.
+
+
 **GPGKEY=**""::
 	Specify a key to use for gpg signing instead of the default key in the
 	keyring. Can be overridden with makepkg's `--key` option.