From ab3300c5816ee26e2d74ac99e2d84c3dfd7cdf82 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sat, 3 Oct 2009 22:56:04 +0100
Subject: intel: Add a configure option to *disable* building libdrm-intel

In conjunction with the atomic operation patch, it may be more
convenient for some people to disable building libdrm-intel and its
dependencies upon the atomic intrinsics then it is for them to use a
supported compiler.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 configure.ac       | 39 ++++++++++++++++++++++++---------------
 libdrm/Makefile.am |  6 +++++-
 2 files changed, 29 insertions(+), 16 deletions(-)

diff --git a/configure.ac b/configure.ac
index 2852962e..9832caff 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,6 +43,11 @@ AC_ARG_ENABLE(udev,	AS_HELP_STRING([--enable-udev],
 				[Enable support for using udev instead of mknod (default: disabled)]),
 				[UDEV=$enableval], [UDEV=no])
 
+AC_ARG_ENABLE(intel,
+	      AS_HELP_STRING([--disable-intel],
+	      [Enable support for intel's KMS API (default: enabled)]),
+	      [INTEL=$enableval], [INTEL=yes])
+
 AC_ARG_ENABLE(nouveau-experimental-api,
 	      AS_HELP_STRING([--enable-nouveau-experimental-api],
 	      [Enable support for nouveau's experimental API (default: disabled)]),
@@ -146,21 +151,25 @@ if test "x$HAVE_LIBUDEV" = xyes; then
 fi
 AM_CONDITIONAL(HAVE_LIBUDEV, [test "x$HAVE_LIBUDEV" = xyes])
 
-# Check for atomic intrinsics
-AC_CACHE_CHECK([for native atomic primitives], drm_cv_atomic_primitives,
-[
-	drm_cv_atomic_primitives="none"
-
-	AC_TRY_LINK([
-int atomic_add(int i) { return __sync_fetch_and_add (&i, 1); }
-int atomic_cmpxchg(int i, int j, int k) { return __sync_val_compare_and_swap (&i, j, k); }
-], [],
-	  drm_cv_atomic_primitives="Intel"
-	  )
-])
-if test "x$drm_cv_atomic_primitives" = xIntel; then
-	AC_DEFINE(HAVE_INTEL_ATOMIC_PRIMITIVES, 1,
-		  [Enable if your compiler supports the Intel __sync_* atomic primitives])
+AM_CONDITIONAL(HAVE_INTEL, [test "x$INTEL" = xyes])
+
+if test "x$INTEL" = xyes; then
+    # Check for atomic intrinsics
+    AC_CACHE_CHECK([for native atomic primitives], drm_cv_atomic_primitives,
+    [
+	    drm_cv_atomic_primitives="none"
+
+	    AC_TRY_LINK([
+    int atomic_add(int i) { return __sync_fetch_and_add (&i, 1); }
+    int atomic_cmpxchg(int i, int j, int k) { return __sync_val_compare_and_swap (&i, j, k); }
+    ], [],
+	      drm_cv_atomic_primitives="Intel"
+	      )
+    ])
+    if test "x$drm_cv_atomic_primitives" = xIntel; then
+	    AC_DEFINE(HAVE_INTEL_ATOMIC_PRIMITIVES, 1,
+		      [Enable if your compiler supports the Intel __sync_* atomic primitives])
+    fi
 fi
 
 AC_SUBST(WARN_CFLAGS)
diff --git a/libdrm/Makefile.am b/libdrm/Makefile.am
index 0c07220f..d13bead7 100644
--- a/libdrm/Makefile.am
+++ b/libdrm/Makefile.am
@@ -18,6 +18,10 @@
 #  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 #  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+if HAVE_INTEL
+INTEL_SUBDIR = intel
+endif
+
 if HAVE_NOUVEAU
 NOUVEAU_SUBDIR = nouveau
 endif
@@ -26,7 +30,7 @@ if HAVE_RADEON
 RADEON_SUBDIR = radeon
 endif
 
-SUBDIRS = . intel $(NOUVEAU_SUBDIR) $(RADEON_SUBDIR)
+SUBDIRS = . $(INTEL_SUBDIR) $(NOUVEAU_SUBDIR) $(RADEON_SUBDIR)
 
 libdrm_la_LTLIBRARIES = libdrm.la
 libdrm_ladir = $(libdir)
-- 
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