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-rw-r--r--gcc/configure.ac2
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/configure.ac b/gcc/configure.ac
index fad09531277..0a626e9f504 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -5918,7 +5918,7 @@ fi
# it's new in isl 0.15.
if test "x${ISLLIBS}" != "x" ; then
saved_CXXFLAGS="$CXXFLAGS"
- CXXFLAGS="$CXXFLAGS $ISLINC"
+ CXXFLAGS="$CXXFLAGS $ISLINC $GMPINC"
saved_LIBS="$LIBS"
LIBS="$LIBS $ISLLIBS $GMPLIBS"