From 20dd451cd06b8b6c0bc4846c9195bf93e6a5ef8c Mon Sep 17 00:00:00 2001
From: Green Sky <green@g-s.xyz>
Date: Sun, 6 Nov 2022 15:31:38 +0100
Subject: [PATCH] fix linker warning and add lto example as comment

---
 CMakeLists.txt                                      | 13 ++++++++++---
 .../opengl_primitives/src/mm/opengl/fbo_builder.cpp |  7 ++++---
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 37edfe6..6896d27 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,9 +20,16 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
 
 # add this to your projects cmake to enable ipo
-#include(CheckIPOSupported)
-#check_ipo_supported()
-#set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ON)
+#if(CMAKE_BUILD_TYPE STREQUAL "Release" OR CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
+	#include(CheckIPOSupported)
+	#check_ipo_supported(RESULT HAVE_LTO)
+	#if(HAVE_LTO)
+		#set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ON)
+		#message(STATUS "Enabled LTO")
+	#else()
+		#message(STATUS "LTO not supported")
+	#endif()
+#endif()
 
 # enable test
 if(CMAKE_PROJECT_NAME STREQUAL PROJECT_NAME)
diff --git a/framework/opengl_primitives/src/mm/opengl/fbo_builder.cpp b/framework/opengl_primitives/src/mm/opengl/fbo_builder.cpp
index 2a37043..f45d20d 100644
--- a/framework/opengl_primitives/src/mm/opengl/fbo_builder.cpp
+++ b/framework/opengl_primitives/src/mm/opengl/fbo_builder.cpp
@@ -55,15 +55,16 @@ FBOBuilder& FBOBuilder::setTarget(FrameBufferObject::Target target) {
 FBOBuilder& FBOBuilder::attachTexture(std::shared_ptr<Texture> tex, GLuint attachment_type) {
 	GLenum target;
 	switch (_currTarget) {
-		case FrameBufferObject::Target::RW:
-			target = GL_FRAMEBUFFER;
-			break;
 		case FrameBufferObject::Target::R:
 			target = GL_READ_FRAMEBUFFER;
 			break;
 		case FrameBufferObject::Target::W:
 			target = GL_DRAW_FRAMEBUFFER;
 			break;
+		//case FrameBufferObject::Target::RW:
+		default:
+			target = GL_FRAMEBUFFER;
+			break;
 	}
 
 	if (tex->samples == 0u) {