[Mesa-stable] [PATCH] egl: add HAVE_LIBDRM define, fix EGL X11 platform

[Tapani Pälli]

Commit a594cec broke EGL X11 backend by adding dependency between
X11 and DRM backends requiring HAVE_EGL_PLATFORM_DRM defined for X11.

This patch fixes the issue by adding additional define for libdrm
detection independent of which backend is being compiled. Tested by
compiling Mesa with '--with-egl-platforms=x11' and running es2gears_x11
+ glbenchmark2.7 successfully.

v2: return true for dri2_auth if running without libdrm (Samuel)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=72062
Signed-off-by: Tapani Pälli <tapani.palli at intel.com>
Cc: Samuel Thibault <samuel.thibault at ens-lyon.org>
Cc: mesa-stable at lists.freedesktop.org
---
 configure.ac                        | 3 +++
 src/egl/drivers/dri2/Makefile.am    | 1 +
 src/egl/drivers/dri2/platform_x11.c | 9 +++------
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/configure.ac b/configure.ac
index 8c52535..fdab621 100644
--- a/configure.ac
+++ b/configure.ac
@@ -761,6 +761,9 @@ AC_SUBST([MESA_LLVM])
 # Check for libdrm
 PKG_CHECK_MODULES([LIBDRM], [libdrm >= $LIBDRM_REQUIRED],
                   [have_libdrm=yes], [have_libdrm=no])
+if test "x$have_libdrm" = xyes; then
+	DEFINES="$DEFINES -DHAVE_LIBDRM"
+fi
 
 PKG_CHECK_MODULES([LIBUDEV], [libudev >= $LIBUDEV_REQUIRED],
                   have_libudev=yes, have_libudev=no)
diff --git a/src/egl/drivers/dri2/Makefile.am b/src/egl/drivers/dri2/Makefile.am
index 823ef5e..a6a81df 100644
--- a/src/egl/drivers/dri2/Makefile.am
+++ b/src/egl/drivers/dri2/Makefile.am
@@ -29,6 +29,7 @@ AM_CFLAGS = \
 	-I$(top_builddir)/src/egl/wayland/wayland-drm \
 	$(DEFINES) \
 	$(VISIBILITY_CFLAGS) \
+	$(HAVE_LIBDRM) \
 	$(LIBDRM_CFLAGS) \
 	$(LIBUDEV_CFLAGS) \
 	$(LIBKMS_CFLAGS) \
diff --git a/src/egl/drivers/dri2/platform_x11.c b/src/egl/drivers/dri2/platform_x11.c
index c56a413..04cb62b 100644
--- a/src/egl/drivers/dri2/platform_x11.c
+++ b/src/egl/drivers/dri2/platform_x11.c
@@ -33,7 +33,7 @@
 #include <fcntl.h>
 #include <errno.h>
 #include <unistd.h>
-#ifdef HAVE_DRM_PLATFORM
+#ifdef HAVE_LIBDRM
 #include <xf86drm.h>
 #endif
 #include <sys/types.h>
@@ -608,7 +608,7 @@ dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
 static EGLBoolean
 dri2_authenticate(_EGLDisplay *disp)
 {
-#ifdef HAVE_DRM_PLATFORM
+#ifdef HAVE_LIBDRM
    struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
    drm_magic_t magic;
 
@@ -621,11 +621,8 @@ dri2_authenticate(_EGLDisplay *disp)
       _eglLog(_EGL_WARNING, "DRI2: failed to authenticate");
       return EGL_FALSE;
    }
-
-   return EGL_TRUE;
-#else
-   return EGL_FALSE;
 #endif
+   return EGL_TRUE;
 }
 
 static EGLBoolean
-- 
1.8.1.4