1 files changed, 26 insertions, 2 deletions

diff --git a/cmake/modules/FindGBM.cmake b/cmake/modules/FindGBM.cmake
index ac95241..37a26a7 100644
--- a/cmake/modules/FindGBM.cmake
+++ b/cmake/modules/FindGBM.cmake
@@ -2,7 +2,7 @@
 # ----------
 # Finds the GBM library
 #
-# This will will define the following variables::
+# This will define the following variables::
 #
 # GBM_FOUND - system has GBM
 # GBM_INCLUDE_DIRS - the GBM include directory
@@ -29,11 +29,35 @@ find_package_handle_standard_args(GBM
                                   REQUIRED_VARS GBM_LIBRARY GBM_INCLUDE_DIR
                                   VERSION_VAR GBM_VERSION)
 
+include(CheckCSourceCompiles)
+set(CMAKE_REQUIRED_LIBRARIES ${GBM_LIBRARY})
+check_c_source_compiles("#include <gbm.h>
+
+                         int main()
+                         {
+                           gbm_bo_map(NULL, 0, 0, 0, 0, GBM_BO_TRANSFER_WRITE, NULL, NULL);
+                         }
+                         " GBM_HAS_BO_MAP)
+
+check_c_source_compiles("#include <gbm.h>
+
+                         int main()
+                         {
+                           gbm_surface_create_with_modifiers(NULL, 0, 0, 0, NULL, 0);
+                         }
+                         " GBM_HAS_MODIFIERS)
+
 if(GBM_FOUND)
   set(GBM_LIBRARIES ${GBM_LIBRARY})
   set(GBM_INCLUDE_DIRS ${GBM_INCLUDE_DIR})
   set(GBM_DEFINITIONS -DHAVE_GBM=1)
-    if(NOT TARGET GBM::GBM)
+  if(GBM_HAS_BO_MAP)
+    list(APPEND GBM_DEFINITIONS -DHAS_GBM_BO_MAP=1)
+  endif()
+  if(GBM_HAS_MODIFIERS)
+    list(APPEND GBM_DEFINITIONS -DHAS_GBM_MODIFIERS=1)
+  endif()
+  if(NOT TARGET GBM::GBM)
     add_library(GBM::GBM UNKNOWN IMPORTED)
     set_target_properties(GBM::GBM PROPERTIES
                                    IMPORTED_LOCATION "${GBM_LIBRARY}"