Mesa (10.1): configure: don't require libudev for gbm or egl drm/wayland

[Carl Worth]

Module: Mesa
Branch: 10.1
Commit: 358d05617a4f08e702d6e92b6bd575bb54f5c9e9
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=358d05617a4f08e702d6e92b6bd575bb54f5c9e9

Author: Jonathan Gray <jsg at jsg.id.au>
Date:   Sun Mar 23 15:53:08 2014 +1100

configure: don't require libudev for gbm or egl drm/wayland

After the loader changes libudev is no longer required for
gbm or the egl drm/wayland platforms.  Lets these build/run
on OpenBSD.

v2: preserve the libudev requirement for Linux as suggested
by Emil Velikov.

Signed-off-by: Jonathan Gray <jsg at jsg.id.au>
Cc: "10.1" <mesa-stable at lists.freedesktop.org>
Reviewed-by: Emil Velikov <emil.l.velikov at gmail.com>
(cherry picked from commit 81799c82e47b34db6eeca34113016d2d8389669d)

---

 configure.ac |   21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/configure.ac b/configure.ac
index b8a8fa3..430e6f3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -780,6 +780,13 @@ if test "x$have_libdrm" = xyes; then
 	DEFINES="$DEFINES -DHAVE_LIBDRM"
 fi
 
+case "$host_os" in
+linux*)
+    need_libudev=yes ;;
+*)
+    need_libudev=no ;;
+esac
+
 PKG_CHECK_MODULES([LIBUDEV], [libudev >= $LIBUDEV_REQUIRED],
                   have_libudev=yes, have_libudev=no)
 
@@ -1184,7 +1191,7 @@ if test "x$enable_gbm" = xauto; then
     esac
 fi
 if test "x$enable_gbm" = xyes; then
-    if test x"$have_libudev" != xyes; then
+    if test "x$need_libudev$have_libudev" = xyesno; then
         AC_MSG_ERROR([gbm requires udev >= $LIBUDEV_REQUIRED])
     fi
 
@@ -1196,7 +1203,11 @@ if test "x$enable_gbm" = xyes; then
     fi
 fi
 AM_CONDITIONAL(HAVE_GBM, test "x$enable_gbm" = xyes)
-GBM_PC_REQ_PRIV="libudev >= $LIBUDEV_REQUIRED"
+if test "x$need_libudev" = xyes; then
+    GBM_PC_REQ_PRIV="libudev >= $LIBUDEV_REQUIRED"
+else
+    GBM_PC_REQ_PRIV=""
+fi
 GBM_PC_LIB_PRIV="$DLOPEN_LIBS"
 AC_SUBST([GBM_PC_REQ_PRIV])
 AC_SUBST([GBM_PC_LIB_PRIV])
@@ -1467,8 +1478,8 @@ for plat in $egl_platforms; do
 		;;
 	esac
 
-        case "$plat$have_libudev" in
-                waylandno|drmno)
+        case "$plat$need_libudev$have_libudev" in
+                waylandyesno|drmyesno)
                     AC_MSG_ERROR([cannot build $plat platform without udev >= $LIBUDEV_REQUIRED]) ;;
         esac
 done
@@ -1708,7 +1719,7 @@ gallium_require_llvm() {
 
 gallium_require_drm_loader() {
     if test "x$enable_gallium_loader" = xyes; then
-        if test "x$have_libudev" != xyes; then
+        if test "x$need_libudev$have_libudev" = xyesno; then
             AC_MSG_ERROR([Gallium drm loader requires libudev >= $LIBUDEV_REQUIRED])
         fi
         if test "x$have_libdrm" != xyes; then