[x265] [PATCH] [RFC] LTO

[Peter Kovář]

# HG changeset patch
# User Peter Kovář <peter.kovar at reflexion.tv>
# Date 1435170971 -7200
#      Wed Jun 24 20:36:11 2015 +0200
# Node ID 9e80570db6045a234041a072d56721b9ab9b1296
# Parent  3a5cd130f9084147168c02f26de102faf59d193b
[RFC] LTO

Link time optimization.

diff -r 3a5cd130f908 -r 9e80570db604 source/CMakeLists.txt
--- a/source/CMakeLists.txt	Mon Jun 22 17:39:54 2015 -0700
+++ b/source/CMakeLists.txt	Wed Jun 24 20:36:11 2015 +0200
@@ -458,6 +458,13 @@
     endif()
 endif()
 
+option(ENABLE_LTO "Enable link time optimization" OFF)
+if(ENABLE_LTO)
+    if(${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
+        list(APPEND LINKER_OPTIONS "--lto")
+    endif()
+endif()
+
 if(X265_LATEST_TAG)
     # convert lists of link libraries into -lstdc++ -lm etc..
     foreach(LIB ${CMAKE_CXX_IMPLICIT_LINK_LIBRARIES} ${PLATFORM_LIBS})