Added explicit include directories for OpenGL and X11 in CMake files

examples/X11/CMakeLists.txt

@@ -6,7 +6,9 @@ set(SRC ${SRCROOT}/X11.cpp)
 
 # find OpenGL, GLU and X11
 find_package(OpenGL REQUIRED)
+include_directories(${OPENGL_INCLUDE_DIR})
 find_package(X11 REQUIRED)
+include_directories(${X11_INCLUDE_DIR})
 
 # define the X11 target
 sfml_add_example(X11 GUI_APP

examples/opengl/CMakeLists.txt

@@ -6,6 +6,7 @@ set(SRC ${SRCROOT}/OpenGL.cpp)
 
 # find OpenGL and GLU
 find_package(OpenGL REQUIRED)
+include_directories(${OPENGL_INCLUDE_DIR})
 
 # define the opengl target
 sfml_add_example(opengl GUI_APP

examples/window/CMakeLists.txt

@@ -6,6 +6,7 @@ set(SRC ${SRCROOT}/Window.cpp)
 
 # find OpenGL and GLU
 find_package(OpenGL REQUIRED)
+include_directories(${OPENGL_INCLUDE_DIR})
 
 # define the window target
 sfml_add_example(window GUI_APP

src/SFML/Graphics/CMakeLists.txt

@@ -72,7 +72,7 @@ if(MACOSX)
 endif()
 
 # add include paths of external libraries
-include_directories(${FREETYPE_INCLUDE_DIRS} ${GLEW_INCLUDE_PATH} ${JPEG_INCLUDE_DIR})
+include_directories(${FREETYPE_INCLUDE_DIRS} ${GLEW_INCLUDE_PATH} ${JPEG_INCLUDE_DIR} ${OPENGL_INCLUDE_DIR})
 
 # build the list of libraries to link
 # GL and X11 are only needed for shared build, as they are already linked by sfml-window

src/SFML/Window/CMakeLists.txt

@@ -98,11 +98,13 @@ endif()
 
 # find external libraries
 find_package(OpenGL REQUIRED)
+include_directories(${OPENGL_INCLUDE_DIR})
 if(LINUX)
     find_package(X11 REQUIRED)
     if(NOT X11_Xrandr_FOUND)
         message(FATAL_ERROR "Xrandr library not found")
     endif()
+    include_directories(${X11_INCLUDE_DIR})
 endif()
 
 # build the list of external libraries to link