sig-t-exclude-multiple-20090321

LICENSE IPL10

disallow multiple typedefs of sig_t

diff --git a/acinclude.m4 b/acinclude.m4
index c544e6b..296c042 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -1564,7 +1564,10 @@ AC_CHECK_TYPES(sig_t, , ,
    #include <signal.h> ])
 AH_BOTTOM(
 [#ifndef HAVE_SIG_T
+#ifndef SIG_T_DEFINED
+#define SIG_T_DEFINED
 typedef RETSIGTYPE (*sig_t) ();
+#endif
 #endif])
 AC_CHECK_TYPE([sig_atomic_t], ,
     [AC_DEFINE([sig_atomic_t], [int],