[PATCH input-evdev 05/10] config: refactor and comment the sdkdir distcheck workaround

[Gaetan Nadon]

Seperate legitimate sdkdir usage from distcheck workaround.
Comment this non obvious workaround.

Signed-off-by: Gaetan Nadon <memsize at videotron.ca>
---
 Makefile.am  |    2 +-
 configure.ac |   14 +++++++++-----
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 47d5e78..00c7940 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -19,7 +19,7 @@
 #  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
-# Ensure headers are installed below $(prefix) for distcheck
+# Provide an sdk location that is writable by the evdev module
 DISTCHECK_CONFIGURE_FLAGS = --with-sdkdir='$${includedir}/xorg'
 
 SUBDIRS = src man include
diff --git a/configure.ac b/configure.ac
index b1352ec..7213f73 100644
--- a/configure.ac
+++ b/configure.ac
@@ -60,13 +60,17 @@ XORG_DRIVER_CHECK_EXT(XINPUT, inputproto)
 # to satisfy silly distcheck requirements.
 PKG_CHECK_MODULES(XORG, xorg-server xproto $REQUIRED_MODULES)
 
-AC_ARG_WITH([sdkdir], [],
-    [sdkdir="$withval"],
-    [sdkdir=`$PKG_CONFIG --variable=sdkdir xorg-server`])
-AC_SUBST([sdkdir])
-
 # Checks for libraries.
 
+# X Server SDK location is required to install evdev header files
+# This location is also relayed in the xorg-evdev.pc file
+sdkdir=`$PKG_CONFIG --variable=sdkdir xorg-server`
+
+# Workaround overriding sdkdir to be able to create a tarball when user has no
+# write permission in sdkdir. See DISTCHECK_CONFIGURE_FLAGS in Makefile.am
+AC_ARG_WITH([sdkdir], [], [sdkdir="$withval"])
+AC_SUBST([sdkdir])
+
 DRIVER_NAME=evdev
 AC_SUBST([DRIVER_NAME])
 
-- 
1.6.0.4