gl: set default value to 0 for all definitions that go to gstglconfig.h

To avoid warnings like "GST_GL_HAVE_OPENGL is not defined".
As we are using #if instead of #ifdef

configure.ac

@@ -1029,71 +1029,100 @@ GL_APIS=
 GL_CONFIG_DEFINES=
 
 dnl APIs
+
+GST_GL_HAVE_OPENGL=0
+GST_GL_HAVE_GLES2=0
+GST_GL_HAVE_GLES3=0
+
 if test "x$USE_OPENGL" = "xyes"; then
   GL_APIS="gl $GL_APIS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_OPENGL 1"
+  GST_GL_HAVE_OPENGL=1
 fi
 if test "x$USE_GLES2" = "xyes"; then
   GL_APIS="gles2 $GL_APIS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_GLES2 1"
+  GST_GL_HAVE_GLES2=1
 fi
 
+GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
+#define GST_GL_HAVE_OPENGL $GST_GL_HAVE_OPENGL
+#define GST_GL_HAVE_GLES2 $GST_GL_HAVE_GLES2
+#define GST_GL_HAVE_GLES3 $GST_GL_HAVE_GLES3
+"
+
 dnl WINDOW's
+
+GST_GL_HAVE_WINDOW_X11=0
+GST_GL_HAVE_WINDOW_COCOA=0
+GST_GL_HAVE_WINDOW_WIN32=0
+GST_GL_HAVE_WINDOW_WAYLAND=0
+GST_GL_HAVE_WINDOW_ANDROID=0
+GST_GL_HAVE_WINDOW_DISPMANX=1
+
 if test "x$HAVE_WINDOW_X11" = "xyes"; then
   GL_WINDOWS="x11 $GL_WINDOWS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_WINDOW_X11 1"
+  GST_GL_HAVE_WINDOW_X11=1
 fi
 if test "x$HAVE_WINDOW_COCOA" = "xyes"; then
   GL_WINDOWS="cocoa $GL_WINDOWS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_WINDOW_COCOA 1"
+  GST_GL_HAVE_WINDOW_COCOA=1
 fi
 if test "x$HAVE_WINDOW_WIN32" = "xyes"; then
   GL_WINDOWS="win32 $GL_WINDOWS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_WINDOW_WIN32 1"
+  GST_GL_HAVE_WINDOW_WIN32=1
 fi
 if test "x$HAVE_WINDOW_WAYLAND" = "xyes"; then
   GL_WINDOWS="wayland $GL_WINDOWS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_WINDOW_WAYLAND 1"
+  GST_GL_HAVE_WINDOW_WAYLAND=1
 fi
 if test "x$HAVE_WINDOW_ANDROID" = "xyes"; then
   GL_WINDOWS="android $GL_WINDOWS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_WINDOW_ANDROID 1"
+  GST_GL_HAVE_WINDOW_ANDROID=1
 fi
 if test "x$HAVE_WINDOW_DISPMANX" = "xyes"; then
   GL_WINDOWS="dispmanx $GL_WINDOWS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_WINDOW_DISPMANX 1"
+  GST_GL_HAVE_WINDOW_DISPMANX=1
 fi
 
+GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
+#define GST_GL_HAVE_WINDOW_X11 $GST_GL_HAVE_WINDOW_X11
+#define GST_GL_HAVE_WINDOW_COCOA $GST_GL_HAVE_WINDOW_COCOA
+#define GST_GL_HAVE_WINDOW_WIN32 $GST_GL_HAVE_WINDOW_WIN32
+#define GST_GL_HAVE_WINDOW_WAYLAND $GST_GL_HAVE_WINDOW_WAYLAND
+#define GST_GL_HAVE_WINDOW_ANDROID $GST_GL_HAVE_WINDOW_ANDROID
+#define GST_GL_HAVE_WINDOW_DISPMANX $GST_GL_HAVE_WINDOW_DISPMANX
+"
+
 dnl PLATFORM's
+
+GST_GL_HAVE_PLATFORM_EGL=0
+GST_GL_HAVE_PLATFORM_GLX=0
+GST_GL_HAVE_PLATFORM_WGL=0
+GST_GL_HAVE_PLATFORM_COCOA=0
+
 if test "x$USE_EGL" = "xyes"; then
   GL_PLATFORMS="egl $GL_PLATFORMS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_PLATFORM_EGL 1"
+  GST_GL_HAVE_PLATFORM_EGL=1
 fi
 if test "x$USE_GLX" = "xyes"; then
   GL_PLATFORMS="glx $GL_PLATFORMS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_PLATFORM_GLX 1"
+  GST_GL_HAVE_PLATFORM_GLX=1
 fi
 if test "x$USE_WGL" = "xyes"; then
   GL_PLATFORMS="wgl $GL_PLATFORMS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_PLATFORM_WGL 1"
+  GST_GL_HAVE_PLATFORM_WGL=1
 fi
 if test "x$USE_COCOA" = "xyes"; then
   GL_PLATFORMS="cocoa $GL_PLATFORMS"
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_PLATFORM_COCOA 1"
+  GST_GL_HAVE_PLATFORM_COCOA=1
 fi
 
+GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
+#define GST_GL_HAVE_PLATFORM_EGL $GST_GL_HAVE_PLATFORM_EGL
+#define GST_GL_HAVE_PLATFORM_GLX $GST_GL_HAVE_PLATFORM_GLX
+#define GST_GL_HAVE_PLATFORM_WGL $GST_GL_HAVE_PLATFORM_WGL
+#define GST_GL_HAVE_PLATFORM_COCOA $GST_GL_HAVE_PLATFORM_COCOA
+"
+
 dnl Check for no platforms/window systems
 if test "x$GL_APIS" = "x"; then
   AC_MSG_WARN([Either OpenGL or OpenGL|ES is required for OpenGL support])
@@ -1169,30 +1198,38 @@ if test "x$USE_OPENGL" = "xyes"; then
 "
 fi
 
+GST_GL_HAVE_GLEGLIMAGEOES=0
+GST_GL_HAVE_GLCHAR=0
+GST_GL_HAVE_GLSIZEIPTR=0
+GST_GL_HAVE_GLINTPTR=0
+
 AC_CHECK_TYPES(GLeglImageOES, [], [], [[$GL_INCLUDES]])
 if test "x$ac_cv_type_GLeglImageOES" = "xyes"; then
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_GLEGLIMAGEOES 1"
+  GST_GL_HAVE_GLEGLIMAGEOES=1
 fi
 
 AC_CHECK_TYPES(GLchar, [], [], [[$GL_INCLUDES]])
 if test "x$ac_cv_type_GLchar" = "xyes"; then
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_GLCHAR 1"
+  GST_GL_HAVE_GLCHAR=1
 fi
 
 AC_CHECK_TYPES(GLsizeiptr, [], [], [[$GL_INCLUDES]])
 if test "x$ac_cv_type_GLsizeiptr" = "xyes"; then
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_GLSIZEIPTR 1"
+  GST_GL_HAVE_GLSIZEIPTR=1
 fi
 
 AC_CHECK_TYPES(GLintptr, [], [], [[$GL_INCLUDES]])
 if test "x$ac_cv_type_GLintptr" = "xyes"; then
-  GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
-#define GST_GL_HAVE_GLINTPTR 1"
+  GST_GL_HAVE_GLINTPTR=1
 fi
 
+GL_CONFIG_DEFINES="$GL_CONFIG_DEFINES
+#define GST_GL_HAVE_GLEGLIMAGEOES $GST_GL_HAVE_GLEGLIMAGEOES
+#define GST_GL_HAVE_GLCHAR $GST_GL_HAVE_GLCHAR
+#define GST_GL_HAVE_GLSIZEIPTR $GST_GL_HAVE_GLSIZEIPTR
+#define GST_GL_HAVE_GLINTPTR $GST_GL_HAVE_GLINTPTR
+"
+
 AC_CONFIG_COMMANDS([gst-libs/gst/gl/gstglconfig.h], [
 	outfile=gstglconfig.h-tmp
 	cat > $outfile <<\_______EOF