Allow --with-cpu=native.

git-svn-id: https://svn.dealii.org/trunk@19321 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/aclocal.m4 b/deal.II/aclocal.m4
index af7c09ccb69cc14e66b9427827a0f5b32001bd44..f0e9c21d185ea682c97059b60ed12234bbc32629 100644 (file)
--- a/deal.II/aclocal.m4
+++ b/deal.II/aclocal.m4
@@ -2010,6 +2010,22 @@ AC_DEFUN(DEAL_II_CHECK_CPU_OPTIMIZATIONS, dnl
           ;;
         esac
         ;;
+
+    native)
+        AC_MSG_RESULT(native processor variant)
+       case "$GXX_VERSION" in
+         gcc*)
+             dnl Tune for this processor, but only in optimized mode
+              dnl (to prevent the effects of possible compiler bugs to affect
+              dnl both debug as well as optimized versions)
+             CXXFLAGSO="$CXXFLAGSO -march=native"
+
+             dnl Also set the mode for f77 compiler
+             F77FLAGSO="$F77FLAGSO -march=native
+          ;;
+        esac
+        ;;
+
     *)
         AC_MSG_RESULT(none given or not recognized)
        ;;