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

3 files changed, 1 insertions, 219 deletions

diff --git a/lib/gnulib.mk b/lib/gnulib.mk
index e219292aa34..231b38dbf03 100644
--- a/lib/gnulib.mk
+++ b/lib/gnulib.mk
@@ -21,7 +21,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=open --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=sigprocmask --avoid=threadlib --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt byteswap c-ctype c-strcase careadlinkat close-stream count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dtotimespec dup2 environ execinfo faccessat fcntl fcntl-h fdatasync fdopendir filemode fstatat fsync getloadavg getopt-gnu gettime gettimeofday intprops largefile lstat manywarnings memrchr mkostemp mktime pipe2 pselect pthread_sigmask putenv qacl readlink readlinkat sig2str socklen stat-time stdalign stdarg stdbool stdio strftime strtoimax strtoumax symlink sys_stat sys_time time timer-time timespec-add timespec-sub unsetenv update-copyright utimens warnings
+# Reproduce by: gnulib-tool --import --dir=. --lib=libgnu --source-base=lib --m4-base=m4 --doc-base=doc --tests-base=tests --aux-dir=build-aux --avoid=close --avoid=dup --avoid=fchdir --avoid=fstat --avoid=malloc-posix --avoid=msvc-inval --avoid=msvc-nothrow --avoid=open --avoid=openat-die --avoid=opendir --avoid=raise --avoid=save-cwd --avoid=select --avoid=sigprocmask --avoid=stdarg --avoid=stdbool --avoid=threadlib --makefile-name=gnulib.mk --conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca-opt byteswap c-ctype c-strcase careadlinkat close-stream count-one-bits count-trailing-zeros crypto/md5 crypto/sha1 crypto/sha256 crypto/sha512 dtoastr dtotimespec dup2 environ execinfo faccessat fcntl fcntl-h fdatasync fdopendir filemode fstatat fsync getloadavg getopt-gnu gettime gettimeofday intprops largefile lstat manywarnings memrchr mkostemp mktime pipe2 pselect pthread_sigmask putenv qacl readlink readlinkat sig2str socklen stat-time stdalign stdio strftime strtoimax strtoumax symlink sys_stat sys_time time timer-time timespec-add timespec-sub unsetenv update-copyright utimens warnings
 
 
 MOSTLYCLEANFILES += core *.stackdump
@@ -900,57 +900,6 @@ EXTRA_DIST += stdalign.in.h
 
 ## end   gnulib module stdalign
 
-## begin gnulib module stdarg
-
-BUILT_SOURCES += $(STDARG_H)
-
-# We need the following in order to create <stdarg.h> when the system
-# doesn't have one that works with the given compiler.
-if GL_GENERATE_STDARG_H
-stdarg.h: stdarg.in.h $(top_builddir)/config.status
-        $(AM_V_GEN)rm -f $@-t $@ && \
-        { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */' && \
-          sed -e 's|@''GUARD_PREFIX''@|GL|g' \
-              -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
-              -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
-              -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
-              -e 's|@''NEXT_STDARG_H''@|$(NEXT_STDARG_H)|g' \
-              < $(srcdir)/stdarg.in.h; \
-        } > $@-t && \
-        mv $@-t $@
-else
-stdarg.h: $(top_builddir)/config.status
-        rm -f $@
-endif
-MOSTLYCLEANFILES += stdarg.h stdarg.h-t
-
-EXTRA_DIST += stdarg.in.h
-
-## end   gnulib module stdarg
-
-## begin gnulib module stdbool
-
-BUILT_SOURCES += $(STDBOOL_H)
-
-# We need the following in order to create <stdbool.h> when the system
-# doesn't have one that works.
-if GL_GENERATE_STDBOOL_H
-stdbool.h: stdbool.in.h $(top_builddir)/config.status
-        $(AM_V_GEN)rm -f $@-t $@ && \
-        { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \
-          sed -e 's/@''HAVE__BOOL''@/$(HAVE__BOOL)/g' < $(srcdir)/stdbool.in.h; \
-        } > $@-t && \
-        mv $@-t $@
-else
-stdbool.h: $(top_builddir)/config.status
-        rm -f $@
-endif
-MOSTLYCLEANFILES += stdbool.h stdbool.h-t
-
-EXTRA_DIST += stdbool.in.h
-
-## end   gnulib module stdbool
-
 ## begin gnulib module stddef
 
 BUILT_SOURCES += $(STDDEF_H)
diff --git a/lib/stdarg.in.h b/lib/stdarg.in.h
deleted file mode 100644
index 5b37dd3601a..00000000000
--- a/lib/stdarg.in.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/* Substitute for and wrapper around <stdarg.h>.
-   Copyright (C) 2008-2014 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, see <http://www.gnu.org/licenses/>.  */
-
-#ifndef _@GUARD_PREFIX@_STDARG_H
-
-#if __GNUC__ >= 3
-@PRAGMA_SYSTEM_HEADER@
-#endif
-@PRAGMA_COLUMNS@
-
-/* The include_next requires a split double-inclusion guard.  */
-#@INCLUDE_NEXT@ @NEXT_STDARG_H@
-
-#ifndef _@GUARD_PREFIX@_STDARG_H
-#define _@GUARD_PREFIX@_STDARG_H
-
-#ifndef va_copy
-# define va_copy(a,b) ((a) = (b))
-#endif
-
-#endif /* _@GUARD_PREFIX@_STDARG_H */
-#endif /* _@GUARD_PREFIX@_STDARG_H */
diff --git a/lib/stdbool.in.h b/lib/stdbool.in.h
deleted file mode 100644
index 651e8dffdb3..00000000000
--- a/lib/stdbool.in.h
+++ /dev/null
@@ -1,132 +0,0 @@
-/* Copyright (C) 2001-2003, 2006-2014 Free Software Foundation, Inc.
-   Written by Bruno Haible <haible@clisp.cons.org>, 2001.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, see <http://www.gnu.org/licenses/>.  */
-
-#ifndef _GL_STDBOOL_H
-#define _GL_STDBOOL_H
-
-/* ISO C 99 <stdbool.h> for platforms that lack it.  */
-
-/* Usage suggestions:
-
-   Programs that use <stdbool.h> should be aware of some limitations
-   and standards compliance issues.
-
-   Standards compliance:
-
-       - <stdbool.h> must be #included before 'bool', 'false', 'true'
-         can be used.
-
-       - You cannot assume that sizeof (bool) == 1.
-
-       - Programs should not undefine the macros bool, true, and false,
-         as C99 lists that as an "obsolescent feature".
-
-   Limitations of this substitute, when used in a C89 environment:
-
-       - <stdbool.h> must be #included before the '_Bool' type can be used.
-
-       - You cannot assume that _Bool is a typedef; it might be a macro.
-
-       - Bit-fields of type 'bool' are not supported.  Portable code
-         should use 'unsigned int foo : 1;' rather than 'bool foo : 1;'.
-
-       - In C99, casts and automatic conversions to '_Bool' or 'bool' are
-         performed in such a way that every nonzero value gets converted
-         to 'true', and zero gets converted to 'false'.  This doesn't work
-         with this substitute.  With this substitute, only the values 0 and 1
-         give the expected result when converted to _Bool' or 'bool'.
-
-       - C99 allows the use of (_Bool)0.0 in constant expressions, but
-         this substitute cannot always provide this property.
-
-   Also, it is suggested that programs use 'bool' rather than '_Bool';
-   this isn't required, but 'bool' is more common.  */
-
-
-/* 7.16. Boolean type and values */
-
-/* BeOS <sys/socket.h> already #defines false 0, true 1.  We use the same
-   definitions below, but temporarily we have to #undef them.  */
-#if defined __BEOS__ && !defined __HAIKU__
-# include <OS.h> /* defines bool but not _Bool */
-# undef false
-# undef true
-#endif
-
-#ifdef __cplusplus
-# define _Bool bool
-# define bool bool
-#else
-# if defined __BEOS__ && !defined __HAIKU__
-  /* A compiler known to have 'bool'.  */
-  /* If the compiler already has both 'bool' and '_Bool', we can assume they
-     are the same types.  */
-#  if !@HAVE__BOOL@
-typedef bool _Bool;
-#  endif
-# else
-#  if !defined __GNUC__
-   /* If @HAVE__BOOL@:
-        Some HP-UX cc and AIX IBM C compiler versions have compiler bugs when
-        the built-in _Bool type is used.  See
-          http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
-          http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
-          http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html
-        Similar bugs are likely with other compilers as well; this file
-        wouldn't be used if <stdbool.h> was working.
-        So we override the _Bool type.
-      If !@HAVE__BOOL@:
-        Need to define _Bool ourselves. As 'signed char' or as an enum type?
-        Use of a typedef, with SunPRO C, leads to a stupid
-          "warning: _Bool is a keyword in ISO C99".
-        Use of an enum type, with IRIX cc, leads to a stupid
-          "warning(1185): enumerated type mixed with another type".
-        Even the existence of an enum type, without a typedef,
-          "Invalid enumerator. (badenum)" with HP-UX cc on Tru64.
-        The only benefit of the enum, debuggability, is not important
-        with these compilers.  So use 'signed char' and no enum.  */
-#   define _Bool signed char
-#  else
-   /* With this compiler, trust the _Bool type if the compiler has it.  */
-#   if !@HAVE__BOOL@
-   /* For the sake of symbolic names in gdb, define true and false as
-      enum constants, not only as macros.
-      It is tempting to write
-         typedef enum { false = 0, true = 1 } _Bool;
-      so that gdb prints values of type 'bool' symbolically.  But then
-      values of type '_Bool' might promote to 'int' or 'unsigned int'
-      (see ISO C 99 6.7.2.2.(4)); however, '_Bool' must promote to 'int'
-      (see ISO C 99 6.3.1.1.(2)).  So add a negative value to the
-      enum; this ensures that '_Bool' promotes to 'int'.  */
-typedef enum { _Bool_must_promote_to_int = -1, false = 0, true = 1 } _Bool;
-#   endif
-#  endif
-# endif
-# define bool _Bool
-#endif
-
-/* The other macros must be usable in preprocessor directives.  */
-#ifdef __cplusplus
-# define false false
-# define true true
-#else
-# define false 0
-# define true 1
-#endif
-
-#define __bool_true_false_are_defined 1
-
-#endif /* _GL_STDBOOL_H */