Guard gbm and eglstreams parts for non-gbm or non-eglstreams systems

src/plugins/platforms/drm/drm_backend.cpp

@@ -7,6 +7,7 @@
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 #include "drm_backend.h"
+#include <config-kwin.h>
 #include "drm_output.h"
 #include "drm_object_connector.h"
 #include "drm_object_crtc.h"

src/plugins/platforms/drm/drm_gpu.cpp

@@ -8,7 +8,7 @@
 */
 
 #include "drm_gpu.h"
-
+#include <config-kwin.h>
 #include "drm_backend.h"
 #include "drm_output.h"
 #include "drm_object_connector.h"

src/plugins/platforms/drm/egl_multi_backend.cpp

@@ -8,9 +8,14 @@
 */
 
 #include "egl_multi_backend.h"
+#include <config-kwin.h>
 #include "logging.h"
+#if HAVE_GBM
 #include "egl_gbm_backend.h"
+#endif
+#if HAVE_EGL_STREAMS
 #include "egl_stream_backend.h"
+#endif
 #include "drm_backend.h"
 #include "drm_gpu.h"
 
@@ -134,14 +139,20 @@ void EglMultiBackend::addGpu(DrmGpu *gpu)
 {
     AbstractEglDrmBackend *backend;
     if (gpu->useEglStreams()) {
+#if HAVE_EGL_STREAMS
         backend = new EglStreamBackend(m_platform, gpu);
+#endif
     } else {
+#if HAVE_GBM
         backend = new EglGbmBackend(m_platform, gpu);
+#endif
     }
-    if (m_initialized) {
-        backend->init();
+    if (backend) {
+        if (m_initialized) {
+            backend->init();
+        }
+        m_backends.append(backend);
     }
-    m_backends.append(backend);
 }
 
 void EglMultiBackend::removeGpu(DrmGpu *gpu)

src/plugins/platforms/x11/windowed/x11windowed_backend.cpp

@@ -8,6 +8,7 @@
 */
 #include "x11windowed_backend.h"
 #include "x11windowed_output.h"
+#include <config-kwin.h>
 #include "scene_qpainter_x11_backend.h"
 #include "logging.h"
 #include "wayland_server.h"

src/plugins/platforms/x11/windowed/x11windowed_output.cpp

@@ -7,6 +7,7 @@
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 #include "x11windowed_output.h"
+#include <config-kwin.h>
 #include "renderloop_p.h"
 #include "softwarevsyncmonitor.h"
 #include "x11windowed_backend.h"