fix 1bb8a7b0b895af4a9e6b24101fe8fab5af64f86c

diff --git a/acinclude.m4 b/acinclude.m4
index 7105b69ec259b68072dd76084d6d3b5aa81e216a..8afd3bd7cfc5d94cf1ea11dff7be9f9bc7e2992a 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -2691,7 +2691,7 @@ EOF
         continue;
       fi
       for var in CFLAGS CXXFLAGS CPPFLAGS LDFLAGS EXTRA_LDFLAGS_PROGRAM LIBS CC CXX; do
-       if test `expr $arg : ".*${var}.*"` != 0;
+       if test `expr "X$arg" : "X.*${var}.*"` != 0;
           then
          continue 2
           fi
@@ -2703,7 +2703,7 @@ EOF
         continue;
       fi
       for var in CFLAGS CXXFLAGS CPPFLAGS LDFLAGS EXTRA_LDFLAGS_PROGRAM LIBS CC CXX; do
-       if test `expr $arg : ".*${var}.*"` != 0;
+       if test `expr "X$arg" : "X.*${var}.*"` != 0;
           then
          continue 2
           fi