xf86-video-intel: configure.ac

[Chris Wilson]

 configure.ac |   17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

New commits:
commit 3b9259f7cedc179617bc24b3912d2d8d75c5a824
Author: Ian Stakenvicius <axs at gentoo.org>
Date:   Fri Sep 14 21:04:42 2012 +0100

    configure: Make udev dependency optional
    
    In order to support buildbots where the udev headers may exist on the
    build system but not the target, we need explicit control over optional
    dependencies.
    
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54942

diff --git a/configure.ac b/configure.ac
index f94f140..2d651e1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -85,9 +85,20 @@ fi
 PKG_CHECK_MODULES(GEN4ASM, [intel-gen4asm >= 1.2], [gen4asm=yes], [gen4asm=no])
 AM_CONDITIONAL(HAVE_GEN4ASM, test x$gen4asm = xyes)
 
-PKG_CHECK_MODULES(UDEV, [libudev], [udev=yes], [udev=no])
-if test x"$udev" = xyes; then
-	AC_DEFINE(HAVE_UDEV,1,[Enable udev-based monitor hotplug detection])
+AC_ARG_ENABLE(udev,
+              AS_HELP_STRING([--disable-udev],
+                             [Disable udev-based monitor hotplug detection [default=auto]]),
+              [UDEV="$enableval"],
+              [UDEV=auto])
+
+if test x$UDEV != "xno"; then
+	PKG_CHECK_MODULES(UDEV, [libudev], [udev=yes], [udev=no])
+	if test x$UDEV == xyes -a x$udev != xyes; then
+		AC_MSG_ERROR([udev support requested but not found (libudev)])
+	fi
+	if test x$udev = xyes; then
+		AC_DEFINE(HAVE_UDEV,1,[Enable udev-based monitor hotplug detection])
+	fi
 fi
 
 PKG_CHECK_MODULES(X11, [x11 xrender xext pixman-1], [x11=yes], [x11=no])