Assume C89 or later.

* configure.in (AC_C_PROTOTYPES, AC_C_VOLATILE, AC_C_CONST)
(POINTER_TYPE, PROTOTYPES): Remove.
* admin/CPP-DEFINES: Remove NULL, const.
* lib-src/etags.c (static, const): Remove macros.
(PTR): Remove; all uses replaced with void *.  Omit needless casts.
* src/alloc.c, src/buffer.c, lisp.h: Replace POINTER_TYPE with void.
* alloc.c (overrun_check_malloc, overrun_check_realloc, xmalloc)
(xrealloc):
* buffer.c (mmap_free_1, mmap_enlarge): Omit needless casts.
* editfns.c, fns.c, gmalloc.c, insdel.c, sysdep.c, termcap.c (NULL):
* textprop.c, tparam.c (NULL): Remove.
* ralloc.c, vm-limit.c (POINTER): Assume void * works.
* regex.c (SIGN_EXTEND_CHAR): Assume signed char works.
* regex.h (_RE_ARGS): Remove.  All uses rewritten to use prototypes.
* unexelf.c (ElfBitsW): Assume c89 preprocessor or better.
* xterm.c (input_signal_count): Assume volatile works.

2 files changed, 12 insertions, 22 deletions

diff --git a/lib-src/ChangeLog b/lib-src/ChangeLog
index 1b4cd548a99..c3ddc9bfbab 100644
--- a/lib-src/ChangeLog
+++ b/lib-src/ChangeLog
@@ -1,3 +1,9 @@
+2012-05-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Assume C89 or later.
+        * etags.c (static, const): Remove macros.
+        (PTR): Remove; all uses replaced with void *.  Omit needless casts.
+
 2012-05-21  Glenn Morris  <rgm@gnu.org>
 
         * Makefile.in (insrcdir, $(DESTDIR)${archlibdir}):
diff --git a/lib-src/etags.c b/lib-src/etags.c
index ccf97a8357f..7d2a5a90999 100644
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -93,22 +93,6 @@ char pot_etags_version[] = "@(#) pot revision number is 17.38.1.4";
 
 #ifdef HAVE_CONFIG_H
 # include <config.h>
-  /* This is probably not necessary any more.  On some systems, config.h
-     used to define static as nothing for the sake of unexec.  We don't
-     want that here since we don't use unexec.  None of these systems
-     are supported any more, but the idea is still mentioned in
-     etc/PROBLEMS.  */
-# undef static
-# ifndef PTR                    /* for XEmacs */
-#   define PTR void *
-# endif
-#else  /* no config.h */
-# if defined (__STDC__) && (__STDC__ || defined (__SUNPRO_C))
-#   define PTR void *           /* for generic pointers */
-# else /* not standard C */
-#   define const                /* remove const for old compilers' sake */
-#   define PTR long *           /* don't use void* */
-# endif
 #endif /* !HAVE_CONFIG_H */
 
 #ifndef _GNU_SOURCE
@@ -415,8 +399,8 @@ static bool filename_is_absolute (char *f);
 static void canonicalize_filename (char *);
 static void linebuffer_init (linebuffer *);
 static void linebuffer_setlen (linebuffer *, int);
-static PTR xmalloc (size_t);
-static PTR xrealloc (char *, size_t);
+static void *xmalloc (size_t);
+static void *xrealloc (char *, size_t);
 
 
 static char searchar = '/';     /* use /.../ searches */
@@ -6686,19 +6670,19 @@ linebuffer_setlen (linebuffer *lbp, int toksize)
 }
 
 /* Like malloc but get fatal error if memory is exhausted. */
-static PTR
+static void *
 xmalloc (size_t size)
 {
-  PTR result = (PTR) malloc (size);
+  void *result = malloc (size);
   if (result == NULL)
     fatal ("virtual memory exhausted", (char *)NULL);
   return result;
 }
 
-static PTR
+static void *
 xrealloc (char *ptr, size_t size)
 {
-  PTR result = (PTR) realloc (ptr, size);
+  void *result = realloc (ptr, size);
   if (result == NULL)
     fatal ("virtual memory exhausted", (char *)NULL);
   return result;