Other try to get lto working on windows

[simgrid.git] / buildtools / Cmake / Flags.cmake

diff --git a/buildtools/Cmake/Flags.cmake b/buildtools/Cmake/Flags.cmake
index 28a0cb4..f013a16 100644 (file)
--- a/buildtools/Cmake/Flags.cmake
+++ b/buildtools/Cmake/Flags.cmake
@@ -25,9 +25,16 @@ endif()
 
 if(enable_compile_optimizations)
   set(optCFLAGS "-O3 -finline-functions -funroll-loops -fno-strict-aliasing ")
-  if(COMPILER_C_VERSION_MAJOR_MINOR STRGREATER "4.5")
-    set(optCFLAGS "${optCFLAGS}-flto ")
-  endif()
+  if(WIN32)
+    if (COMPILER_C_VERSION_MAJOR_MINOR STRGREATER "4.7")
+    # On windows, we need 4.8 or higher to enable lto because of http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50293
+      set(optCFLAGS "${optCFLAGS} -flto ")    
+  else()    
+    # On non-windows, 4.6 is enough for that
+    if(COMPILER_C_VERSION_MAJOR_MINOR STRGREATER "4.5")
+      set(optCFLAGS "${optCFLAGS} -flto ")
+    endif()
+  endif
 else()
   set(optCFLAGS "-O0 ")
 endif()
@@ -79,5 +86,5 @@ if(NOT $ENV{LDFLAGS} STREQUAL "")
 endif()
 
 if(enable_model-checking AND enable_compile_optimizations)
-  message(WARNING "Sorry for now GCC optimizations does not work with model checking.\nPlease turn off optimizations with command:\ncmake -Denable_compile_optimizations=off. ")
+  message(WARNING "Sorry for now GCC optimizations does not work with model checking.\nPlease turn off optimizations with command:\ncmake -Denable_compile_optimizations=off .")
 endif()