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-rw-r--r--configure.in4
1 files changed, 3 insertions, 1 deletions
diff --git a/configure.in b/configure.in
index 7201d84..6ca1f5a 100644
--- a/configure.in
+++ b/configure.in
@@ -214,7 +214,9 @@ AC_CHAR_UNSIGNED
AC_CONST
-AC_COMPILE_CHECK([signed char], [], [signed char c;], [], AC_DEFINE(signed, []))
+AC_COMPILE_CHECK([lack of working volatile],[],[volatile int x; x = 0;],,AC_DEFINE(volatile,))
+
+AC_COMPILE_CHECK([lack of working signed char], [], [signed char c;],,AC_DEFINE(signed, []))
AC_CHECKING(for prototypes)
AC_TEST_PROGRAM([