* configure: Add a check, in the case that we cannot make an

executable, whether this is due to being required to use C99.
For instance, the Solaris environment requires compilation
using the C99 dialect if _XOPEN_SOURCE is set to 600 or higher.

* debug.c: When compiling as C99, we have to obey the special
C99 conventions for instantiating inline functions.

* hash.c: Likewise.

* lib.c: Likewise.

* parser.y: Likewise.

* unwind.c: Likewise.

1 files changed, 5 insertions, 0 deletions

diff --git a/unwind.c b/unwind.c
index c76c4b0b..895a6ba3 100644
--- a/unwind.c
+++ b/unwind.c
@@ -47,6 +47,11 @@ static uw_frame_t *uw_env_stack;
 static uw_frame_t *uw_exit_point;
 static uw_frame_t toplevel_env;
 
+/* C99 inline instantiations. */
+#if __STDC_VERSION__ >= 199901L
+val uw_block_return(val tag, val result);
+#endif
+
 static void uw_unwind_to_exit_point(void)
 {
   assert (uw_exit_point);