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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 d2cc04cf9..8156a9319 100644
--- a/configure.ac
+++ b/configure.ac
@@ -230,7 +230,7 @@ if test -z "$GMP_CC$GMP_CFLAGS" ; then
for cpp in cpp gcc /lib/cpp cc c99
do
case $cpp in
- *cpp*) ;;
+ *cpp*) cpp="$cpp -P" ;;
*) cpp="$cpp -E" ;;
esac
echo "#include \"gmp.h\"" > conftest.c