[PATCH input-vmmouse] tools: make install fails when user has no write permission in /lib

[Gaetan Nadon]

The location of the udevdir is obtained from pkg-config. This is generally
/lib/udev. Most people run their build scripts as non-root and do not want to
overwrite or add files on their workstation system.

This was not the behaviour in release 12.8.0. The code in configure.ac set
udevdir based on common installation prefixes /usr or /usr/local for which
the user would probably have root permission anyway. Other prefixes would
be assigned a udevdir value under the given $prefix.

The patch proposes the default location $libdir/udev/rules.d and no longer
seeking it's value from pkg-config, just like what was done for hal.

The expectation is that the xorg source tree can be built from top to bottom
out of the box without tweaks or workarounds. A developer need to
manually install a rule under development and run an admin command for it to
take effect. Unlike binaries or libraries, there is no "path" style
variable to append a rule in development from a different location.

Signed-off-by: Gaetan Nadon <memsize at videotron.ca>
---
 configure.ac |   15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/configure.ac b/configure.ac
index 52ea460..83a8488 100644
--- a/configure.ac
+++ b/configure.ac
@@ -91,17 +91,14 @@ AC_ARG_WITH(hal-fdi-dir,
 HAL_FDI_DIR=${halfdidir}
 AC_SUBST(HAL_FDI_DIR)
 
-
-PKG_CHECK_MODULES(UDEV, udev,
-                  [UDEV_RULES_DIR="`$PKG_CONFIG --variable=udevdir udev`/rules.d"],
-                  [UDEV_RULES_DIR=no])
-
+# Udev location for rules directory
 AC_ARG_WITH(udev-rules-dir,
 	    AS_HELP_STRING([--with-udev-rules-dir=DIR],
-			   [Default udev rules.d directory
-			    [[default=($prefix)/lib/udev/rules.d on Linux, none otherwise]]]),
-	    [UDEV_RULES_DIR="$withval"],
-	    [])
+			   [Directory where udev expects its rules files
+			   [[default=$libdir/udev/rules.d]]]),
+	    [udevdir="$withval"],
+	    [udevdir="$libdir/udev/rules.d"])
+UDEV_RULES_DIR=${udevdir}
 AC_SUBST(UDEV_RULES_DIR)
 AM_CONDITIONAL(HAS_UDEV_RULES_DIR, [test "x$UDEV_RULES_DIR" != "xno"])
 
-- 
1.7.9.5