maint: use a git submodule for gnulib

* .gitmodules: New file, to track gnulib.
* .gnulib: Submodule directory.
* Makefile.am (EXTRA_DIST): Don't list config.rpath or
gitlog-to-changelog.
* autogen.sh: Adapt to use the new submodule.
* cfg.mk: New file.
(SUBDIRS): Add gnulib/lib and gnulib/tests.
(dist-hook): Reflect new location of getlog-to-changelog.
* configure.ac: Set build-aux/ as AUX_DIR.
Invoke gl_EARLY and gl_INIT.
(AC_CONFIG_FILES): Add gnulib/lib/Makefile and gnulib/tests/Makefile.

1 files changed, 153 insertions, 0 deletions

diff --git a/cfg.mk b/cfg.mk
new file mode 100644
index 00000000..071c856b
--- /dev/null
+++ b/cfg.mk
@@ -0,0 +1,153 @@
+# Customize Makefile.maint.                           -*- makefile -*-
+# Copyright (C) 2003-2009 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 of the License, 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/>.
+
+# Use alpha.gnu.org for alpha and beta releases.
+# Use ftp.gnu.org for major releases.
+gnu_ftp_host-alpha = alpha.gnu.org
+gnu_ftp_host-beta = alpha.gnu.org
+gnu_ftp_host-major = ftp.gnu.org
+gnu_rel_host = $(gnu_ftp_host-$(RELEASE_TYPE))
+
+url_dir_list = \
+  ftp://$(gnu_rel_host)/gnu/coreutils
+
+# Tests not to run as part of "make distcheck".
+local-checks-to-skip =			\
+  sc_po_check				\
+  changelog-check			\
+  check-AUTHORS				\
+  makefile-check			\
+  makefile_path_separator_check		\
+  patch-check				\
+  sc_GPL_version			\
+  sc_always_defined_macros		\
+  sc_cast_of_alloca_return_value	\
+  sc_dd_max_sym_length			\
+  sc_error_exit_success			\
+  sc_file_system			\
+  sc_immutable_NEWS			\
+  sc_makefile_path_separator_check	\
+  sc_obsolete_symbols			\
+  sc_prohibit_S_IS_definition		\
+  sc_prohibit_atoi_atof			\
+  sc_prohibit_jm_in_m4			\
+  sc_prohibit_quote_without_use		\
+  sc_prohibit_quotearg_without_use	\
+  sc_prohibit_stat_st_blocks		\
+  sc_prohibit_strcmp_and_strncmp	\
+  sc_prohibit_strcmp			\
+  sc_root_tests				\
+  sc_space_tab				\
+  sc_sun_os_names			\
+  sc_system_h_headers			\
+  sc_tight_scope			\
+  sc_two_space_separator_in_usage	\
+  sc_error_message_uppercase		\
+  sc_program_name			\
+  sc_require_test_exit_idiom		\
+  sc_makefile_check			\
+  sc_useless_cpp_parens
+
+# Avoid uses of write(2).  Either switch to streams (fwrite), or use
+# the safewrite wrapper.
+sc_avoid_write:
+	@if $(VC_LIST_EXCEPT) | grep '\.c$$' > /dev/null; then		\
+	  grep '\<write *(' $$($(VC_LIST_EXCEPT) | grep '\.c$$') &&	\
+	    { echo "$(ME): the above files use write;"			\
+	      " consider using the safewrite wrapper instead"		\
+		  1>&2; exit 1; } || :;					\
+	else :;								\
+	fi
+
+# Use STREQ rather than comparing strcmp == 0, or != 0.
+# Similarly, use STREQLEN or STRPREFIX rather than strncmp.
+sc_prohibit_strcmp_and_strncmp:
+	@grep -nE '! *strn?cmp *\(|\<strn?cmp *\([^)]+\) *=='		\
+	    $$($(VC_LIST_EXCEPT))					\
+	  | grep -vE ':# *define STREQ(LEN)?\(' &&			\
+	  { echo '$(ME): use STREQ(LEN) in place of the above uses of strcmp(strncmp)' \
+		1>&2; exit 1; } || :
+
+# Use virAsprintf rather than a'sprintf since *strp is undefined on error.
+sc_prohibit_asprintf:
+	@re='\<[a]sprintf\>'						\
+	msg='use virAsprintf, not a'sprintf				\
+	  $(_prohibit_regexp)
+
+# Prohibit the inclusion of <ctype.h>.
+sc_prohibit_ctype_h:
+	@grep -E '^# *include  *<ctype\.h>' $$($(VC_LIST_EXCEPT)) &&	\
+	  { echo "$(ME): don't use ctype.h; instead, use c-ctype.h"	\
+		1>&2; exit 1; } || :
+
+# Ensure that no C source file uses TABs for indentation.
+sc_TAB_in_indentation:
+	@grep -lE '^ *	' /dev/null					\
+	     $$($(VC_LIST_EXCEPT)					\
+		| grep -E '\.[ch](\.in)?$$') &&				\
+	  { echo '$(ME): found TAB(s) used for indentation in C sources;'\
+	      'use spaces' 1>&2; exit 1; } || :
+
+ctype_re = isalnum|isalpha|isascii|isblank|iscntrl|isdigit|isgraph|islower\
+|isprint|ispunct|isspace|isupper|isxdigit|tolower|toupper
+
+sc_avoid_ctype_macros:
+	@grep -E '\b($(ctype_re)) *\(' /dev/null			\
+	     $$($(VC_LIST_EXCEPT)) &&					\
+	  { echo "$(ME): don't use ctype macros (use c-ctype.h)"	\
+		1>&2; exit 1; } || :
+
+sc_prohibit_virBufferAdd_with_string_literal:
+	@re='\<virBufferAdd *\([^,]+, *"[^"]'				\
+	msg='use virBufferAddLit, not virBufferAdd, with a string literal' \
+	  $(_prohibit_regexp)
+
+# Not only do they fail to deal well with ipv6, but the gethostby*
+# functions are also not thread-safe.
+sc_prohibit_gethostby:
+	@re='\<gethostby(addr|name2?) *\('				\
+	msg='use getaddrinfo, not gethostby*'				\
+	  $(_prohibit_regexp)
+
+# Disallow trailing blank lines.
+sc_prohibit_trailing_blank_lines:
+	@$(VC_LIST_EXCEPT) | xargs perl -ln -0777 -e			\
+	  '/\n\n+$$/ and print $$ARGV' > $@-t
+	@found=0; test -s $@-t && { found=1; cat $@-t 1>&2;		\
+	  echo '$(ME): found trailing blank line(s)' 1>&2; };		\
+	rm -f $@-t;							\
+	test $$found = 0
+
+# We don't use this feature of maint.mk.
+prev_version_file = /dev/null
+
+ifeq (0,$(MAKELEVEL))
+  _curr_status = .git-module-status
+  # The sed filter accommodates those who check out on a commit from which
+  # no tag is reachable.  In that case, git submodule status prints a "-"
+  # in column 1 and does not print a "git describe"-style string after the
+  # submodule name.  Contrast these:
+  # -b653eda3ac4864de205419d9f41eec267cb89eeb .gnulib
+  #  b653eda3ac4864de205419d9f41eec267cb89eeb .gnulib (v0.0-2286-gb653eda)
+  _submodule_hash = sed 's/.//;s/ .*//'
+  _update_required := $(shell						\
+      actual=$$(git submodule status | $(_submodule_hash));		\
+      stamp="$$($(_submodule_hash) $(_curr_status) 2>/dev/null)";	\
+      test "$$stamp" = "$$actual"; echo $$?)
+  ifeq (1,$(_update_required))
+    $(error gnulib update required; run ./autogen.sh first)
+  endif
+endif