Bump to autoconf 2.69 and automake 1.15.1

~~~
New in v2:

- Remove version checks from AUTOMAKE_OPTIONS and AC_PREREQ from
  configure.ac's (see rationale below).
- Add AC_USE_SYSTEM_EXTENSIONS to intl/configure.ac (see problem #10).
- Add missing AC_LANG_SOURCE usage in root configure.ac.
- Update README-maintainer-mode
- Re-generated all (hopefully) that needs to be generated.  I built
  using --enable-maintainer-mode, and grepped around to find references
  to prior versions of autoconf/automake.

I forced pushed to users/simark/autotools-bump on sourceware.
~~~

When trying to run the update-gnulib.sh script in gdb, I get this:

Error: Wrong automake version (Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/\${ <-- HERE ([^      =:+{}]+)}/ at /opt/automake/1.11.1/bin/automake line 4113.), we need 1.11.1.
Aborting.

Apparently, it's an issue with a regex in automake that triggers a
warning starting with Perl 5.22.  It has been fixed in automake 1.15.1.
So I think it's a good excuse to bump the versions of autoconf and
automake used in the gnulib import.  And to avoid requiring multiple
builds of autoconf/automake, it was suggested that we bump the required
version of those tools for all binutils-gdb.

For autoconf, the 2.69 version is universally available, so it's an easy
choice.  For automake, different distros and distro versions have
different automake versions.  But 1.15.1 seems to be the most readily
available as a package.  In any case, it's easy to build it from source.

I removed the version checks from AUTOMAKE_OPTIONS and AC_PREREQ,
because I don't think they are useful in our case.  They only specify a
lower bound for the acceptable version of automake/autoconf.  That's
useful if you let the user choose the version of the tool they want to
use, but want to set a minimum version (because you use a feature that
was introduced in that version).  In our case, we force people to use a
specific version anyway.  For the autoconf version, we have the check in
config/override.m4 that enforces the version we want.  It will be one
less thing to update next time we change autotools version.

This patch only includes the manually edited file.  The changes to
generated files are included in the following patch.  I have included
the generated changes in the ChangeLog entries below, and would amend
them just before pushing.

To help with testing, I pushed the changes to the
users/simark/autotools-bump on sourceware's git.

I hit a few categories of problems that required some changes.  They are
described below along with the chosen solutions.

Problem 1:

  configure.ac:17: warning: AM_INIT_AUTOMAKE: two- and three-arguments forms are deprecated.  For more info, see:
  configure.ac:17: http://www.gnu.org/software/automake/manual/automake.html#Modernize-AM_005fINIT_005fAUTOMAKE-invocation

Solution 1:

  Adjust the code based on the example at that URL.

Problem 2 (in zlib/):

  Makefile.am: error: required file './INSTALL' not found
  Makefile.am:   'automake --add-missing' can install 'INSTALL'
  Makefile.am: error: required file './NEWS' not found
  Makefile.am: error: required file './AUTHORS' not found
  Makefile.am: error: required file './COPYING' not found
  Makefile.am:   'automake --add-missing' can install 'COPYING'

Solution 2:

  Add the foreign option to AUTOMAKE_OPTIONS.

Problem 3:

  doc/Makefile.am:20: error: support for Cygnus-style trees has been removed

Solution 3:

  Remove the cygnus options.

Problem 4:

  Makefile.am:656: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')

Solution 4:

  Rename "INCLUDES = " to "AM_CPPFLAGS += " (because AM_CPPFLAGS is
  already defined earlier).

Problem 5:

  doc/Makefile.am:71: warning: suffix '.texinfo' for Texinfo files is discouraged; use '.texi' instead
  doc/Makefile.am: warning: Oops!
  doc/Makefile.am:     It appears this file (or files included by it) are triggering
  doc/Makefile.am:     an undocumented, soon-to-be-removed automake hack.
  doc/Makefile.am:     Future automake versions will no longer place in the builddir
  doc/Makefile.am:     (rather than in the srcdir) the generated '.info' files that
  doc/Makefile.am:     appear to be cleaned, by e.g. being listed in CLEANFILES or
  doc/Makefile.am:     DISTCLEANFILES.
  doc/Makefile.am:     If you want your '.info' files to be placed in the builddir
  doc/Makefile.am:     rather than in the srcdir, you have to use the shiny new
  doc/Makefile.am:     'info-in-builddir' automake option.

Solution 5:

  Rename .texinfo files to .texi.

Problem 6:

  doc/Makefile.am: warning: Oops!
  doc/Makefile.am:     It appears this file (or files included by it) are triggering
  doc/Makefile.am:     an undocumented, soon-to-be-removed automake hack.
  doc/Makefile.am:     Future automake versions will no longer place in the builddir
  doc/Makefile.am:     (rather than in the srcdir) the generated '.info' files that
  doc/Makefile.am:     appear to be cleaned, by e.g. being listed in CLEANFILES or
  doc/Makefile.am:     DISTCLEANFILES.
  doc/Makefile.am:     If you want your '.info' files to be placed in the builddir
  doc/Makefile.am:     rather than in the srcdir, you have to use the shiny new
  doc/Makefile.am:     'info-in-builddir' automake option.

Solution 6:

  Remove the hack at the bottom of doc/Makefile.am and use
  the info-in-builddir automake option.

Problem 7:

  doc/Makefile.am:35: error: required file '../texinfo.tex' not found
  doc/Makefile.am:35:   'automake --add-missing' can install 'texinfo.tex'

Solution 7:

  Use the no-texinfo.tex automake option.  We also have one in
  texinfo/texinfo.tex, not sure if we should point to that, or move it
  (or a newer version of it added with automake --add-missing) to
  top-level.

Problem 8:

  Makefile.am:131: warning: source file 'config/tc-aarch64.c' is in a subdirectory,
  Makefile.am:131: but option 'subdir-objects' is disabled
  automake: warning: possible forward-incompatibility.
  automake: At least a source file is in a subdirectory, but the 'subdir-objects'
  automake: automake option hasn't been enabled.  For now, the corresponding output
  automake: object file(s) will be placed in the top-level directory.  However,
  automake: this behaviour will change in future Automake versions: they will
  automake: unconditionally cause object files to be placed in the same subdirectory
  automake: of the corresponding sources.
  automake: You are advised to start using 'subdir-objects' option throughout your
  automake: project, to avoid future incompatibilities.

Solution 8:

  Use subdir-objects, that means adjusting references to some .o that will now
  be in config/.

Problem 9:

  configure.ac:375: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body
  ../../lib/autoconf/lang.m4:193: AC_LANG_CONFTEST is expanded from...
  ../../lib/autoconf/general.m4:2601: _AC_COMPILE_IFELSE is expanded from...
  ../../lib/autoconf/general.m4:2617: AC_COMPILE_IFELSE is expanded from...
  ../../lib/m4sugar/m4sh.m4:639: AS_IF is expanded from...
  ../../lib/autoconf/general.m4:2042: AC_CACHE_VAL is expanded from...
  ../../lib/autoconf/general.m4:2063: AC_CACHE_CHECK is expanded from...
  configure.ac:375: the top level

Solution 9:

  Use AC_LANG_SOURCE, or use proper quoting.

Problem 10 (in intl/):

  configure.ac:7: warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS
  /usr/share/aclocal/threadlib.m4:36: gl_THREADLIB_EARLY_BODY is expanded from...
  /usr/share/aclocal/threadlib.m4:29: gl_THREADLIB_EARLY is expanded from...
  /usr/share/aclocal/threadlib.m4:318: gl_THREADLIB is expanded from...
  /usr/share/aclocal/lock.m4:9: gl_LOCK is expanded from...
  /usr/share/aclocal/intl.m4:211: gt_INTL_SUBDIR_CORE is expanded from...
  /usr/share/aclocal/intl.m4:25: AM_INTL_SUBDIR is expanded from...
  /usr/share/aclocal/gettext.m4:57: AM_GNU_GETTEXT is expanded from...
  configure.ac:7: the top level

Solution 10:

  Add AC_USE_SYSTEM_EXTENSIONS in configure.ac.

ChangeLog:

	* libtool.m4: Use AC_LANG_SOURCE.
	* configure.ac: Remove AC_PREREQ, use AC_LANG_SOURCE.
	* README-maintainer-mode: Update version requirements.
	* ar-lib: New file.
	* test-driver: New file.
	* configure: Re-generate.

bfd/ChangeLog:

	* Makefile.am (AUTOMAKE_OPTIONS): Remove 1.11.
	(INCLUDES): Rename to ...
	(AM_CPPFLAGS): ... this.
	* configure.ac: Remove AC_PREREQ.
	* doc/Makefile.am (AUTOMAKE_OPTIONS): Remove 1.9, cygnus, add
	info-in-builddir no-texinfo.tex.
	(info_TEXINFOS): Rename bfd.texinfo to bfd.texi.
	* doc/bfd.texinfo: Rename to ...
	* doc/bfd.texi: ... this.
	* Makefile.in: Re-generate.
	* aclocal.m4: Re-generate.
	* config.in: Re-generate.
	* configure: Re-generate.
	* doc/Makefile.in: Re-generate.

binutils/ChangeLog:

	* configure.ac: Remove AC_PREREQ.
	* doc/Makefile.am (AUTOMAKE_OPTIONS): Remove cygnus, add
	info-in-builddir no-texinfo.tex.
	* Makefile.in: Re-generate.
	* aclocal.m4: Re-generate.
	* config.in: Re-generate.
	* configure: Re-generate.
	* doc/Makefile.in: Re-generate.

config/ChangeLog:

	* override.m4 (_GCC_AUTOCONF_VERSION): Bump from 2.64 to 2.69.

etc/ChangeLog:

	* configure.in: Remove AC_PREREQ.
	* configure: Re-generate.

gas/ChangeLog:

	* Makefile.am (AUTOMAKE_OPTIONS): Remove 1.11, add subdir-objects.
	(TARG_CPU_O, OBJ_FORMAT_O, ATOF_TARG_O): Add config/ prefix.
	* configure.ac (TARG_CPU_O, OBJ_FORMAT_O, ATOF_TARG_O, emfiles,
	extra_objects): Add config/ prefix.
	* doc/as.texinfo: Rename to...
	* doc/as.texi: ... this.
	* doc/Makefile.am: Rename as.texinfo to as.texi throughout.
	Remove DISTCLEANFILES hack.
	(AUTOMAKE_OPTIONS): Remove 1.8, cygnus, add no-texinfo.tex and
	info-in-builddir.
	* Makefile.in: Re-generate.
	* aclocal.m4: Re-generate.
	* config.in: Re-generate.
	* configure: Re-generate.
	* doc/Makefile.in: Re-generate.

gdb/ChangeLog:

	* common/common-defs.h (PACKAGE_NAME, PACKAGE_VERSION,
	PACKAGE_STRING, PACKAGE_TARNAME): Undefine.
	* configure.ac: Remove AC_PREREQ, add missing quoting.
	* gnulib/configure.ac: Modernize usage of
	AC_INIT/AM_INIT_AUTOMAKE.  Remove AC_PREREQ.
	* gnulib/update-gnulib.sh (AUTOCONF_VERSION): Bump to 2.69.
	(AUTOMAKE_VERSION): Bump to 1.15.1.
	* configure: Re-generate.
	* config.in: Re-generate.
	* aclocal.m4: Re-generate.
	* gnulib/aclocal.m4: Re-generate.
	* gnulib/config.in: Re-generate.
	* gnulib/configure: Re-generate.
	* gnulib/import/Makefile.in: Re-generate.

gdb/gdbserver/ChangeLog:

	* configure.ac: Remove AC_PREREQ, add missing quoting.
	* configure: Re-generate.
	* config.in: Re-generate.
	* aclocal.m4: Re-generate.

gdb/testsuite/ChangeLog:

	* configure.ac: Remove AC_PREREQ.
	* configure: Re-generate.

gold/ChangeLog:

	* configure.ac: Remove AC_PREREQ, add missing quoting and usage
	of AC_LANG_SOURCE.
	* Makefile.in: Re-generate.
	* aclocal.m4: Re-generate.
	* configure: Re-generate.
	* testsuite/Makefile.in: Re-generate.

gprof/ChangeLog:

	* configure.ac: Remove AC_PREREQ.
	* Makefile.am: Remove DISTCLEANFILES hack.
	(AUTOMAKE_OPTIONS): Remove 1.11, add info-in-builddir.
	* Makefile.in: Re-generate.
	* aclocal.m4: Re-generate.
	* configure: Re-generate.
	* gconfig.in: Re-generate.

intl/ChangeLog:

	* configure.ac: Add AC_USE_SYSTEM_EXTENSIONS, remove AC_PREREQ.
	* configure: Re-generate.
	* config.h.in: Re-generate.
	* aclocal.m4: Re-generate.

ld/ChangeLog:

	* configure.ac: Remove AC_PREREQ.
	* Makefile.am: Remove DISTCLEANFILES hack, rename ld.texinfo to
	ld.texi, ldint.texinfo to ldint.texi throughout.
	(AUTOMAKE_OPTIONS): Add info-in-builddir.
	* README: Rename ld.texinfo to ld.texi, ldint.texinfo to
	ldint.texi throughout.
	* gen-doc.texi: Likewise.
	* h8-doc.texi: Likewise.
	* ld.texinfo: Rename to ...
	* ld.texi: ... this.
	* ldint.texinfo: Rename to ...
	* ldint.texi: ... this.
	* Makefile.in: Re-generate.
	* aclocal.m4: Re-generate.
	* config.in: Re-generate.
	* configure: Re-generate.

libdecnumber/ChangeLog:

	* configure.ac: Remove AC_PREREQ.
	* configure: Re-generate.
	* aclocal.m4.

libiberty/ChangeLog:

	* configure.ac: Remove AC_PREREQ.
	* configure: Re-generate.
	* config.in: Re-generate.

opcodes/ChangeLog:

	* Makefile.am (AUTOMAKE_OPTIONS): Remove 1.11.
	* configure.ac: Remove AC_PREREQ.
	* Makefile.in: Re-generate.
	* aclocal.m4: Re-generate.
	* configure: Re-generate.

readline/ChangeLog.gdb:

	* configure: Re-generate.
	* examples/rlfe/configure: Re-generate.

sim/ChangeLog:

	* All configure.ac: Remove AC_PREREQ.
	* All configure: Re-generate.

zlib/ChangeLog.bin-gdb:

	* configure.ac: Modernize AC_INIT call, remove AC_PREREQ.
	* Makefile.am (AUTOMAKE_OPTIONS): Remove 1.8, cygnus, add
	foreign.
	* Makefile.in: Re-generate.
	* aclocal.m4: Re-generate.
	* configure: Re-generate.

7 files changed, 11 insertions, 19 deletions

diff --git a/ld/Makefile.am b/ld/Makefile.am
index fcd9083..d86ad09 100644
--- a/ld/Makefile.am
+++ b/ld/Makefile.am
@@ -17,7 +17,7 @@
 # <http://www.gnu.org/licenses/>.
 #
 
-AUTOMAKE_OPTIONS = dejagnu no-texinfo.tex no-dist foreign
+AUTOMAKE_OPTIONS = dejagnu no-texinfo.tex no-dist foreign info-in-builddir
 ACLOCAL_AMFLAGS = -I .. -I ../config -I ../bfd
 TEXINFO_TEX = ../texinfo/texinfo.tex
 
@@ -80,7 +80,7 @@ INCDIR	= $(BASEDIR)/include
 # What version of the manual to build
 DOCVER = gen
 
-# Options to extract the man page from ld.texinfo
+# Options to extract the man page from ld.texi
 MANCONF = -Dman
 
 TEXI2POD = perl $(BASEDIR)/etc/texi2pod.pl $(AM_MAKEINFOFLAGS)
@@ -135,9 +135,9 @@ CXXFLAGS_FOR_TARGET = `echo $(CXXFLAGS) | sed -e 's/-fsanitize=address//g' -e 's
 
 transform = s/^ld-new$$/$(installed_linker)/;@program_transform_name@
 bin_PROGRAMS = ld-new
-info_TEXINFOS = ld.texinfo
+info_TEXINFOS = ld.texi
 ld_TEXINFOS = configdoc.texi
-noinst_TEXINFOS = ldint.texinfo
+noinst_TEXINFOS = ldint.texi
 man_MANS = ld.1
 
 AM_MAKEINFOFLAGS = -I $(srcdir) -I $(BFDDIR)/doc -I ../bfd/doc \
@@ -1928,9 +1928,9 @@ configdoc.texi:	${DOCVER}-doc.texi
 # Build the man page from the texinfo file
 # The sed command removes the no-adjust Nroff command so that
 # the man output looks standard.
-ld.1: $(srcdir)/ld.texinfo configdoc.texi
+ld.1: $(srcdir)/ld.texi configdoc.texi
 	touch $@
-	-$(TEXI2POD) $(MANCONF) < $(srcdir)/ld.texinfo > ld.pod
+	-$(TEXI2POD) $(MANCONF) < $(srcdir)/ld.texi > ld.pod
 	-($(POD2MAN) ld.pod | \
 		sed -e '/^.if n .na/d' > $@.T$$$$ && \
 		mv -f $@.T$$$$ $@) || \
@@ -1994,10 +1994,3 @@ distclean-local:
 	rm -rf ldscripts
 
 MAINTAINERCLEANFILES += ld.info
-
-# Automake 1.9 will only build info files in the objdir if they are
-# mentioned in DISTCLEANFILES.  It doesn't have to be unconditional,
-# though, so we use a bogus condition.
-if GENINSRC_NEVER
-DISTCLEANFILES += ld.info
-endif
diff --git a/ld/README b/ld/README
index 16f9442..72b1125 100644
--- a/ld/README
+++ b/ld/README
@@ -18,8 +18,8 @@ There are many features of the linker:
 
 * The linker supports a control language.
 
-* There is a user manual (ld.texinfo), as well as the
-  beginnings of an internals manual (ldint.texinfo).
+* There is a user manual (ld.texi), as well as the
+  beginnings of an internals manual (ldint.texi).
 
 Installation
 ============
@@ -37,7 +37,7 @@ directory (one directory above this one).
 Porting to a new target
 =======================
 
-See the ldint.texinfo manual.
+See the ldint.texi manual.
 
 Reporting bugs etc
 ===========================
diff --git a/ld/configure.ac b/ld/configure.ac
index b14411e..d10c553 100644
--- a/ld/configure.ac
+++ b/ld/configure.ac
@@ -17,7 +17,6 @@ dnl along with this program; see the file COPYING3.  If not see
 dnl <http://www.gnu.org/licenses/>.
 dnl
 
-AC_PREREQ(2.59)
 m4_include([../bfd/version.m4])
 AC_INIT([ld], BFD_VERSION)
 AC_CONFIG_SRCDIR(ldmain.c)
diff --git a/ld/gen-doc.texi b/ld/gen-doc.texi
index 28acc93..1b80ee6 100644
--- a/ld/gen-doc.texi
+++ b/ld/gen-doc.texi
@@ -1,5 +1,5 @@
 @c Copyright (C) 2012-2018 Free Software Foundation, Inc.
-@c For copying conditions, see the file ld.texinfo.
+@c For copying conditions, see the file ld.texi.
 
 @c ------------------------------ CONFIGURATION VARS:
 @c 1. Inclusiveness of this manual
diff --git a/ld/h8-doc.texi b/ld/h8-doc.texi
index ee3fe6a..503eace 100644
--- a/ld/h8-doc.texi
+++ b/ld/h8-doc.texi
@@ -1,5 +1,5 @@
 @c Copyright (C) 2012-2018 Free Software Foundation, Inc.
-@c For copying conditions, see the file ld.texinfo.
+@c For copying conditions, see the file ld.texi.
 
 @c ------------------------------ CONFIGURATION VARS:
 @c 1. Inclusiveness of this manual
diff --git a/ld/ld.texinfo b/ld/ld.texi
index 40d79dd..40d79dd 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texi
diff --git a/ld/ldint.texinfo b/ld/ldint.texi
index 6df7c88..6df7c88 100644
--- a/ld/ldint.texinfo
+++ b/ld/ldint.texi