Assume C99 or later.

* lib/stdarg.in.h, lib/stdbool.in.h, m4/stdarg.m4, m4/stdbool.m4:
Remove.
* configure.ac (_AC_PROG_CC_C89): Define a dummy, to keep 'configure'
smaller.
(gl_PROG_CC_C99): Use this to get C99 or later.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* admin/merge-gnulib (GNULIB_MODULES): Remove stdarg, stdbool.
(GNULIB_TOOL_FLAGS): Avoid stdarg, stdbool.
* doc/lispref/internals.texi (C Dialect): Document this.
* etc/NEWS: Document this.
* nt/gnulib.mk: Remove stdarg and stdbool modules.
* src/bytecode.c (B__dummy__): Remove.
* src/conf_post.h (bool_bf) [!NS_IMPL_GNUSTEP]: Use bool.
(FLEXIBLE_ARRAY_MEMBER): Now always empty.
* src/dbusbind.c (XD_DEBUG_MESSAGE) [!DBUS_DEBUG]:
* src/regex.c (DEBUG_PRINT): Assume varargs macros.
* src/lisp.h (DEFUN_FUNCTION_INIT): Remove.  All uses now assume C99.

Fixes: debbugs:17487

1 files changed, 1 insertions, 6 deletions

diff --git a/src/lisp.h b/src/lisp.h
index f47fb0c2a24..67b26ef91c7 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -2654,16 +2654,11 @@ CHECK_NUMBER_CDR (Lisp_Object x)
        minargs, maxargs, lname, intspec, 0};                            \
    Lisp_Object fnname
 #else  /* not _MSC_VER */
-# if __STDC_VERSION__ < 199901
-#  define DEFUN_FUNCTION_INIT(fnname, maxargs) (Lisp_Object (*) (void)) fnname
-# else
-#  define DEFUN_FUNCTION_INIT(fnname, maxargs) .a ## maxargs = fnname
-# endif
 #define DEFUN(lname, fnname, sname, minargs, maxargs, intspec, doc)     \
    Lisp_Object fnname DEFUN_ARGS_ ## maxargs ;                          \
    static struct Lisp_Subr alignas (GCALIGNMENT) sname =                \
      { { PVEC_SUBR << PSEUDOVECTOR_AREA_BITS },                         \
-       { DEFUN_FUNCTION_INIT (fnname, maxargs) },                       \
+       { .a ## maxargs = fnname },                                      \
        minargs, maxargs, lname, intspec, 0};                            \
    Lisp_Object fnname
 #endif