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-rw-r--r--configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 1e6e374..9d25cd2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1386,7 +1386,7 @@ choke me
CFLAGS="$saved_CFLAGS"
saved_CFLAGS="$CFLAGS"
-CFLAGS="$CFLAGS $clooginc $gmpinc $pplinc"
+CFLAGS="$CFLAGS $clooginc -DCLOOG_PPL_BACKEND $gmpinc $pplinc"
AC_MSG_CHECKING([for correct version of CLooG])
AC_TRY_COMPILE([#include "cloog/cloog.h"],[