From: Augustin Degomme <degomme@idpann.imag.fr>
Date: Thu, 7 Nov 2013 23:02:22 +0000 (+0100)
Subject: flto has not the right effect with clang
X-Git-Tag: v3_10_rc2~8
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/7d9cb71065fb6332d8ff28f85b4abf7a4b9d8afc

flto has not the right effect with clang
(cherry picked from commit 56d1e384b07f2eacd980c30a447504cdf5f1d6ef)
---

diff --git a/buildtools/Cmake/Flags.cmake b/buildtools/Cmake/Flags.cmake
index 4c1178d63d..058ea2d979 100644
--- a/buildtools/Cmake/Flags.cmake
+++ b/buildtools/Cmake/Flags.cmake
@@ -26,15 +26,17 @@ endif()
 
 if(enable_compile_optimizations)
   set(optCFLAGS "-O3 -finline-functions -funroll-loops -fno-strict-aliasing ")
-  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 "${optCFLAGS} -flto ")
-    endif()
-  else()    
-    # On non-windows, 4.6 is enough for that
-    if(COMPILER_C_VERSION_MAJOR_MINOR STRGREATER "4.5")
-      set(optCFLAGS "${optCFLAGS} -flto ")
+  if(CMAKE_COMPILER_IS_GNUCC)
+    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 "${optCFLAGS} -flto ")
+      endif()
+    else()    
+      # On non-windows, 4.6 is enough for that
+      if(COMPILER_C_VERSION_MAJOR_MINOR STRGREATER "4.5")
+        set(optCFLAGS "${optCFLAGS} -flto ")
+      endif()
     endif()
   endif()
 else()