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-rw-r--r--configure.in2
1 files changed, 2 insertions, 0 deletions
diff --git a/configure.in b/configure.in
index 580e5d11ba1..da0fc549975 100644
--- a/configure.in
+++ b/configure.in
@@ -524,8 +524,10 @@ RUBY_CPPOUTFILE
: ${OUTFLAG='-o '}
: ${COUTFLAG=${OUTFLAG}}
+: ${CSRCFLAG=''}
AC_SUBST(OUTFLAG)
AC_SUBST(COUTFLAG)
+AC_SUBST(CSRCFLAG)
cc_version=
for option in --version -v -V -qversion; do