* acconfig.h: include HAVE_SIN6_SCOPE_ID.

[bpt/guile.git] / configure.in

diff --git a/configure.in b/configure.in
index ff584e4..49e5823 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -264,6 +264,17 @@ if test $guile_cv_have_h_errno = yes; then
   AC_DEFINE(HAVE_H_ERRNO)
 fi
 
+# included in rfc2553 but not in older implementations, e.g., glibc 2.1.3.
+AC_MSG_CHECKING(whether sockaddr_in6 has sin6_scope_id)
+AC_CACHE_VAL(guile_cv_have_sin6_scope_id,
+[AC_TRY_COMPILE([#include <netinet/in.h>],
+[struct sockaddr_in6 sok;  sok.sin6_scope_id = 0;],
+guile_cv_have_sin6_scope_id=yes, guile_cv_have_sin6_scope_id=no)])
+AC_MSG_RESULT($guile_cv_have_sin6_scope_id)
+if test $guile_cv_have_sin6_scope_id = yes; then
+  AC_DEFINE(HAVE_SIN6_SCOPE_ID)
+fi
+
 AC_MSG_CHECKING(whether localtime caches TZ)
 AC_CACHE_VAL(guile_cv_localtime_cache,
 [if test x$ac_cv_func_tzset = xyes; then