[PATCH 4/4] build: Guard the inclusions of config.h with HAVE_CONFIG_H

[Damien Lespiau <damien.lespiau@intel.com>]

autoconf can be configured to not generate a config.h but to give the
defines with command line arguments instead. In this case, there's no
config.h to include.

To work in both cases autoconf adds a HAVE_CONFIG_H define on the command
line to signal there's a config.h to include.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
---
 lib/intel_drm.c          |    2 ++
 tests/gem_fence_thrash.c |    2 ++
 tests/kms_flip.c         |    2 ++
 tests/testdisplay.c      |    2 ++
 tools/intel_gpu_top.c    |    2 ++
 5 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/lib/intel_drm.c b/lib/intel_drm.c
index eaf9895..4656b49 100644
--- a/lib/intel_drm.c
+++ b/lib/intel_drm.c
@@ -26,7 +26,9 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
 #include "config.h"
+#endif
 
 #include <unistd.h>
 #include <stdlib.h>
diff --git a/tests/gem_fence_thrash.c b/tests/gem_fence_thrash.c
index 3d50e33..c9e847b 100644
--- a/tests/gem_fence_thrash.c
+++ b/tests/gem_fence_thrash.c
@@ -26,7 +26,9 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
 #include "config.h"
+#endif
 
 #include <unistd.h>
 #include <stdlib.h>
diff --git a/tests/kms_flip.c b/tests/kms_flip.c
index c2a29ae..1de6154 100644
--- a/tests/kms_flip.c
+++ b/tests/kms_flip.c
@@ -21,7 +21,9 @@
  * IN THE SOFTWARE.
  */
 
+#ifdef HAVE_CONFIG_H
 #include "config.h"
+#endif
 
 #include <assert.h>
 #include <cairo.h>
diff --git a/tests/testdisplay.c b/tests/testdisplay.c
index 4d29ddb..251141f 100644
--- a/tests/testdisplay.c
+++ b/tests/testdisplay.c
@@ -45,7 +45,9 @@
  *  - DP commands (e.g. poweroff)
  * - verify outputs against VBT/physical connectors
  */
+#ifdef HAVE_CONFIG_H
 #include "config.h"
+#endif
 
 #include <assert.h>
 #include <cairo.h>
diff --git a/tools/intel_gpu_top.c b/tools/intel_gpu_top.c
index 76a2b0b..c8b506a 100644
--- a/tools/intel_gpu_top.c
+++ b/tools/intel_gpu_top.c
@@ -27,7 +27,9 @@
  *
  */
 
+#ifdef HAVE_CONFIG_H
 #include "config.h"
+#endif
 
 #include <unistd.h>
 #include <stdlib.h>
-- 
1.7.7.5