cmake: add options to disable building of Python and documentation

Closes: #94

Author: davvid

CMakeLists.txt

@@ -46,6 +46,8 @@ else()
     option(PARTIO_BUILD_SHARED_LIBS "Enable shared libraries" ON)
 endif()
 option(PARTIO_BUILD_TOOLS "Enable partio's CLI tools" ON)
+option(PARTIO_BUILD_PYTHON "Enable partio's Python bindings" ON)
+option(PARTIO_BUILD_DOCS "Enable partio's documentation" ON)
 
 # Enable C++11
 if (DEFINED ENV{CXXFLAGS_STD})
@@ -120,10 +122,6 @@ set(OpenGL_GL_PREFERENCE GLVND)
 
 ## Search for useful libraries
 find_package(Threads REQUIRED)
-find_package(GLUT REQUIRED)
-find_package(GTest)
-find_package(OpenGL REQUIRED)
-find_package(Python REQUIRED COMPONENTS Interpreter Development)
 
 set(PARTIO_LIBRARIES partio)
 find_package(ZLIB)
@@ -135,11 +133,19 @@ endif()
 ## Traverse subdirectories
 add_subdirectory(src/lib)
 if (PARTIO_BUILD_TOOLS)
+    find_package(GLUT REQUIRED)
+    find_package(OpenGL REQUIRED)
     add_subdirectory(src/tools)
 endif()
-add_subdirectory(src/py)
-add_subdirectory(src/doc)
+if (PARTIO_BUILD_PYTHON)
+    find_package(Python REQUIRED COMPONENTS Interpreter Development)
+    add_subdirectory(src/py)
+endif()
+if (PARTIO_BUILD_DOCS)
+    add_subdirectory(src/doc)
+endif()
 
 if (GTest_FOUND AND PARTIO_ENABLE_TESTING)
+    find_package(GTest)
     add_subdirectory(src/tests)
 endif()