Add a CMake option to toggle building extra programs.

CMakeLists.txt

@@ -13,6 +13,8 @@ option(BUILD_GLES_CM "Build the OpenGL ES 1.1 library" 1)
 
 option(USE_GROUP_SOURCES "Group the source files in a folder tree for visual studio" 1)
 
+option(BUILD_EXTRA_PROGRAMS "Build extra programs" 1)
+
 # LLVM disallows calling cmake . from the main LLVM dir, the reason is that
 # it builds header files that could overwrite the orignal ones. Here we
 # want to include LLVM as a subdirectory and even though it wouldn't cause
@@ -827,10 +829,11 @@ endif()
 # Extra programs
 ###########################################################
 
-if(LINUX)
+if(BUILD_EXTRA_PROGRAMS)
+    if(LINUX)
         add_executable(OGLES2HelloAPI ${HELLO2_DIR}/OGLES2HelloAPI_LinuxX11.cpp)
         target_link_libraries(OGLES2HelloAPI dl X11 EGL GLESv2)
-elseif(APPLE)
+    elseif(APPLE)
         add_executable(OGLES2HelloAPI MACOSX_BUNDLE
             ${HELLO2_DIR}/OGLES2HelloAPI_OSX.mm
             ${HELLO2_DIR}/Build/OSX/en.lproj/MainMenu.xib
@@ -844,4 +847,5 @@ elseif(APPLE)
         set_source_files_properties(${HELLO2_DIR}/Build/OSX/en.lproj/MainMenu.xib PROPERTIES
             MACOSX_PACKAGE_LOCATION "Resources"
         )
+    endif()
 endif()