Add more reminders to include <config.h>.

* m4/gnulib-common.m4 (gl_COMMON): In config.h, define
_GL_CONFIG_H_INCLUDED.
* lib/acl-internal.h: Test _GL_CONFIG_H_INCLUDED instead of
_GL_INLINE_HEADER_BEGIN.
* lib/alignalloc.h: Likewise.
* lib/argp-fmtstream.h: Likewise.
* lib/argp.h: Likewise.
* lib/binary-io.h: Likewise.
* lib/bitrotate.h: Likewise.
* lib/c-ctype.h: Likewise.
* lib/count-leading-zeros.h: Likewise.
* lib/count-one-bits.h: Likewise.
* lib/count-trailing-zeros.h: Likewise.
* lib/eealloc.h: Likewise.
* lib/execinfo.in.h: Likewise.
* lib/gethrxtime.h: Likewise.
* lib/gl_list.h: Likewise.
* lib/gl_map.h: Likewise.
* lib/gl_omap.h: Likewise.
* lib/gl_openssl.h: Likewise.
* lib/gl_oset.h: Likewise.
* lib/gl_set.h: Likewise.
* lib/gl_xlist.h: Likewise.
* lib/gl_xmap.h: Likewise.
* lib/gl_xomap.h: Likewise.
* lib/gl_xoset.h: Likewise.
* lib/gl_xset.h: Likewise.
* lib/gl_xsublist.h: Likewise.
* lib/glthread/cond.h: Likewise.
* lib/hamt.h: Likewise.
* lib/ialloc.h: Likewise.
* lib/math.in.h: Likewise.
* lib/mbchar.h: Likewise.
* lib/mbfile.h: Likewise.
* lib/mbiter.h: Likewise.
* lib/mbuiter.h: Likewise.
* lib/openat.h: Likewise.
* lib/pipe-filter-aux.h: Likewise.
* lib/priv-set.h: Likewise.
* lib/safe-alloc.h: Likewise.
* lib/savewd.h: Likewise.
* lib/se-context.in.h: Likewise.
* lib/se-label.in.h: Likewise.
* lib/se-selinux.in.h: Likewise.
* lib/sig-handler.h: Likewise.
* lib/stat-time.h: Likewise.
* lib/string-desc-quotearg.h: Likewise.
* lib/string-desc.h: Likewise.
* lib/sys_socket.in.h: Likewise.
* lib/timespec.h: Likewise.
* lib/u64.h: Likewise.
* lib/uchar.in.h: Likewise.
* lib/unistd.in.h: Likewise.
* lib/utimens.h: Likewise.
* lib/wctype.in.h: Likewise.
* lib/xalloc.h: Likewise.
* lib/xbinary-io.h: Likewise.
* lib/xsize.h: Likewise.
* lib/xstring-desc.h: Likewise.
* lib/xtime.h: Likewise.
* lib/acl.h: Check that config.h was already included.
* lib/alignof.h: Likewise.
* lib/argmatch.h: Likewise.
* lib/argv-iter.h: Likewise.
* lib/arpa_inet.in.h: Likewise.
* lib/attribute.h: Likewise.
* lib/backupfile.h: Likewise.
* lib/base32.h: Likewise.
* lib/base64.h: Likewise.
* lib/basename-lgpl.h: Likewise.
* lib/bitset.h: Likewise.
* lib/bitsetv.h: Likewise.
* lib/c-snprintf.h: Likewise.
* lib/c-stack.h: Likewise.
* lib/c-strcase.h: Likewise.
* lib/c-vasnprintf.h: Likewise.
* lib/c-vasprintf.h: Likewise.
* lib/c-vsnprintf.h: Likewise.
* lib/c-xvasprintf.h: Likewise.
* lib/canon-host.h: Likewise.
* lib/canonicalize.h: Likewise.
* lib/clean-temp.h: Likewise.
* lib/concat-filename.h: Likewise.
* lib/ctype.in.h: Likewise.
* lib/dfa.h: Likewise.
* lib/di-set.h: Likewise.
* lib/dirent-safer.h: Likewise.
* lib/dirent.in.h: Likewise.
* lib/dirname.h: Likewise.
* lib/eloop-threshold.h: Likewise.
* lib/error.in.h: Likewise.
* lib/exclude.h: Likewise.
* lib/fatal-signal.h: Likewise.
* lib/fcntl.in.h: Likewise.
* lib/file-type.h: Likewise.
* lib/filenamecat.h: Likewise.
* lib/filevercmp.h: Likewise.
* lib/flexmember.h: Likewise.
* lib/fnmatch.in.h: Likewise.
* lib/fpending.h: Likewise.
* lib/freadable.h: Likewise.
* lib/freadahead.h: Likewise.
* lib/freading.h: Likewise.
* lib/fts_.h: Likewise.
* lib/fwritable.h: Likewise.
* lib/fwriting.h: Likewise.
* lib/gc.h: Likewise.
* lib/get_progname_of.h: Likewise.
* lib/glob.in.h: Likewise.
* lib/glthread/thread.h: Likewise.
* lib/hash-pjw-bare.h: Likewise.
* lib/hash-pjw.h: Likewise.
* lib/hash-triple.h: Likewise.
* lib/hash.h: Likewise.
* lib/i-ring.h: Likewise.
* lib/iconv.in.h: Likewise.
* lib/ino-map.h: Likewise.
* lib/inttostr.h: Likewise.
* lib/inttypes.in.h: Likewise.
* lib/javaversion.h: Likewise.
* lib/langinfo.in.h: Likewise.
* lib/locale.in.h: Likewise.
* lib/localename.h: Likewise.
* lib/malloc.in.h: Likewise.
* lib/malloca.h: Likewise.
* lib/memcasecmp.h: Likewise.
* lib/memchr2.h: Likewise.
* lib/memcmp2.h: Likewise.
* lib/modechange.h: Likewise.
* lib/monetary.in.h: Likewise.
* lib/mountlist.h: Likewise.
* lib/netdb.in.h: Likewise.
* lib/obstack.h: Likewise.
* lib/opendirat.h: Likewise.
* lib/pagealign_alloc.h: Likewise.
* lib/pipe-filter.h: Likewise.
* lib/poll.in.h: Likewise.
* lib/pthread.in.h: Likewise.
* lib/pty.in.h: Likewise.
* lib/quotearg.h: Likewise.
* lib/read-file.h: Likewise.
* lib/readline.h: Likewise.
* lib/readutmp.h: Likewise.
* lib/regex-quote.h: Likewise.
* lib/relocatable.h: Likewise.
* lib/savedir.h: Likewise.
* lib/sched.in.h: Likewise.
* lib/search.in.h: Likewise.
* lib/sh-quote.h: Likewise.
* lib/signal.in.h: Likewise.
* lib/sigpipe-die.h: Likewise.
* lib/sockets.h: Likewise.
* lib/spawn.in.h: Likewise.
* lib/ssfmalloc.h: Likewise.
* lib/stack.h: Likewise.
* lib/stdalign.in.h: Likewise.
* lib/stdarg.in.h: Likewise.
* lib/stddef.in.h: Likewise.
* lib/stdio-safer.h: Likewise.
* lib/stdio.in.h: Likewise.
* lib/stdlib.in.h: Likewise.
* lib/stdnoreturn.in.h: Likewise.
* lib/strerror-override.h: Likewise.
* lib/striconv.h: Likewise.
* lib/striconveh.h: Likewise.
* lib/striconveha.h: Likewise.
* lib/string-buffer.h: Likewise.
* lib/string.in.h: Likewise.
* lib/strings.in.h: Likewise.
* lib/strnlen1.h: Likewise.
* lib/sys_file.in.h: Likewise.
* lib/sys_ioctl.in.h: Likewise.
* lib/sys_random.in.h: Likewise.
* lib/sys_resource.in.h: Likewise.
* lib/sys_select.in.h: Likewise.
* lib/sys_stat.in.h: Likewise.
* lib/sys_time.in.h: Likewise.
* lib/sys_times.in.h: Likewise.
* lib/sys_utsname.in.h: Likewise.
* lib/sys_wait.in.h: Likewise.
* lib/system-quote.h: Likewise.
* lib/term-style-control.h: Likewise.
* lib/termios.in.h: Likewise.
* lib/textstyle.in.h: Likewise.
* lib/threads.in.h: Likewise.
* lib/time.in.h: Likewise.
* lib/trim.h: Likewise.
* lib/utime.in.h: Likewise.
* lib/utmp.in.h: Likewise.
* lib/vasnprintf.h: Likewise.
* lib/verror.h: Likewise.
* lib/version-etc.h: Likewise.
* lib/wchar.in.h: Likewise.
* lib/windows-spawn.h: Likewise.
* lib/windows-thread.h: Likewise.
* lib/xgetcwd.h: Likewise.
* lib/xgetdomainname.h: Likewise.
* lib/xgethostname.h: Likewise.
* lib/xmalloca.h: Likewise.
* lib/xmemdup0.h: Likewise.
* lib/xprintf.h: Likewise.
* lib/xreadlink.h: Likewise.
* lib/xstriconv.h: Likewise.
* lib/xstriconveh.h: Likewise.
* lib/xstrndup.h: Likewise.
* lib/xstrtol-error.h: Likewise.
* lib/xvasprintf.h: Likewise.
* Makefile (config_h_MACROS*): New variables.
(sc_check_config_h_reminder): New rule.

1 files changed, 5 insertions, 1 deletions

diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index 0df2181871..0216017461 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 83
+# gnulib-common.m4 serial 84
 dnl Copyright (C) 2007-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -15,6 +15,10 @@ AC_DEFUN([gl_COMMON], [
   AC_REQUIRE([gl_ZZGNULIB])
 ])
 AC_DEFUN([gl_COMMON_BODY], [
+  AH_VERBATIM([0witness],
+[/* Witness that <config.h> has been included.  */
+#define _GL_CONFIG_H_INCLUDED 1
+])
   AH_VERBATIM([_GL_GNUC_PREREQ],
 [/* True if the compiler says it groks GNU C version MAJOR.MINOR.  */
 #if defined __GNUC__ && defined __GNUC_MINOR__