# Parameterized macros.
# Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001
# 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 2, or (at your option)
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
-#
+
# As a special exception, the Free Software Foundation gives unlimited
# permission to copy, distribute and modify the configure scripts that
# are the output of Autoconf. You need not follow the terms of the GNU
# it reaches the end of `configure.ac'.
#
# - BINSH
-# AC_REQUIRE'd #! /bin/sh line
-# - REVISION
+# #! /bin/sh
+# - HEADER-REVISION
# Sent by AC_REVISION
-# - NOTICE
-# copyright notice(s)
+# - HEADER-COMMENT
+# Purpose of the script.
+# - HEADER-COPYRIGHT
+# Copyright notice(s)
+# - M4SH-INIT
+# Initialization of bottom layers.
+#
# - DEFAULTS
# early initializations (defaults)
# - PARSE_ARGS
# DIVERSION-NAME which is supposed to be an actual diversion number.
# Of course it would be nicer to use m4_case here, instead of zillions
# of little macros, but it then takes twice longer to run `autoconf'!
-m4_define([_m4_divert(BINSH)], 0)
-m4_define([_m4_divert(REVISION)], 1)
-m4_define([_m4_divert(NOTICE)], 2)
-m4_define([_m4_divert(DEFAULTS)], 3)
-m4_define([_m4_divert(PARSE_ARGS)], 4)
+#
+# From M4sugar:
+# -1. KILL
+#
+# From M4sh:
+# 0. BINSH
+# 1. HEADER-REVISION
+# 2. HEADER-COMMENT
+# 3. HEADER-COPYRIGHT
+# 4. M4SH-INIT
-m4_define([_m4_divert(HELP_BEGIN)], 10)
-m4_define([_m4_divert(HELP_CANON)], 11)
-m4_define([_m4_divert(HELP_ENABLE)], 12)
-m4_define([_m4_divert(HELP_WITH)], 13)
-m4_define([_m4_divert(HELP_VAR)], 14)
-m4_define([_m4_divert(HELP_VAR_END)], 15)
-m4_define([_m4_divert(HELP_END)], 16)
+m4_define([_m4_divert(DEFAULTS)], 10)
+m4_define([_m4_divert(PARSE_ARGS)], 20)
-m4_define([_m4_divert(VERSION_BEGIN)], 20)
-m4_define([_m4_divert(VERSION_FSF)], 21)
-m4_define([_m4_divert(VERSION_USER)], 22)
-m4_define([_m4_divert(VERSION_END)], 23)
+m4_define([_m4_divert(HELP_BEGIN)], 100)
+m4_define([_m4_divert(HELP_CANON)], 101)
+m4_define([_m4_divert(HELP_ENABLE)], 102)
+m4_define([_m4_divert(HELP_WITH)], 103)
+m4_define([_m4_divert(HELP_VAR)], 104)
+m4_define([_m4_divert(HELP_VAR_END)], 105)
+m4_define([_m4_divert(HELP_END)], 106)
-m4_define([_m4_divert(INIT_PREPARE)], 30)
+m4_define([_m4_divert(VERSION_BEGIN)], 200)
+m4_define([_m4_divert(VERSION_FSF)], 201)
+m4_define([_m4_divert(VERSION_USER)], 202)
+m4_define([_m4_divert(VERSION_END)], 203)
-m4_define([_m4_divert(BODY)], 40)
+m4_define([_m4_divert(INIT_PREPARE)], 300)
-m4_define([_m4_divert(PREPARE)], 100)
+m4_define([_m4_divert(BODY)], 400)
#
# m4_patsubst(m4_quote($1), [^], [# ])
m4_define([AC_COPYRIGHT],
-[m4_divert_text([NOTICE],
+[m4_divert_text([HEADER-COPYRIGHT],
[m4_patsubst([
$1], [^], [@%:@ ])])dnl
m4_divert_text(m4_default([$2], [VERSION_USER]),
# The second quote in the translit is just to cope with font-lock-mode
# which sees the opening of a string.
m4_define([AC_REVISION],
-[m4_divert_text([REVISION],
+[m4_divert_text([HEADER-REVISION],
[@%:@ From __file__ m4_translit([$1], [$""]).])dnl
])
# _AC_INIT_NOTICE
# ---------------
m4_define([_AC_INIT_NOTICE],
-[m4_divert_text([NOTICE],
+[m4_divert_text([HEADER-COMMENT],
[@%:@ Guess values for system-dependent variables and create Makefiles.
@%:@ Generated by Autoconf AC_ACVERSION[]dnl
m4_ifset([AC_PACKAGE_STRING], [ for AC_PACKAGE_STRING]).])
m4_ifset([AC_PACKAGE_BUGREPORT],
- [m4_divert_text([NOTICE],
+ [m4_divert_text([HEADER-COMMENT],
[@%:@
@%:@ Report bugs to <AC_PACKAGE_BUGREPORT>.])])
])
# AC_PLAIN_SCRIPT
# ---------------
# Simulate AC_INIT, i.e., pretend this is the beginning of the `configure'
-# generation. This is used by some tests, and let `autoconf' be used to
+# generation. This is used by some tests, and lets `autoconf' be used to
# generate other scripts than `configure'.
m4_define([AC_PLAIN_SCRIPT],
[AS_INIT
# and many other people.
+# We heavily use m4's diversions both for the initializations and for
+# required macros (see m4_require), because in both cases we have to
+# issue high in `configure' something which is discovered late.
+#
+# KILL is only used to suppress output.
+#
+# - BINSH
+# AC_REQUIRE'd #! /bin/sh line
+# - HEADER-REVISION
+# RCS keywords etc.
+# - HEADER-COMMENT
+# Purpose of the script etc.
+# - HEADER-COPYRIGHT
+# Copyright notice(s)
+# - M4SH-INIT
+# M4sh's initializations
+
+
+
+# _m4_divert(DIVERSION-NAME)
+# --------------------------
+# Convert a diversion name into its number. Otherwise, return
+# DIVERSION-NAME which is supposed to be an actual diversion number.
+# Of course it would be nicer to use m4_case here, instead of zillions
+# of little macros, but it then takes twice longer to run `autoconf'!
+m4_define([_m4_divert(BINSH)], 0)
+m4_define([_m4_divert(HEADER-REVISION)], 1)
+m4_define([_m4_divert(HEADER-COMMENT)], 2)
+m4_define([_m4_divert(HEADER-COPYRIGHT)], 3)
+m4_define([_m4_divert(M4SH-INIT)], 4)
+
+# Aaarg. Yet it starts with compatibility issues... Libtool wants to
+# use NOTICE to insert its own LIBTOOL-INIT stuff. People should ask
+# before diving into our internals :(
+m4_copy([_m4_divert(M4SH-INIT)], [_m4_divert(NOTICE)])
+
+
+
## ------------------------- ##
## 1. Sanitizing the shell. ##
## ------------------------- ##
# -----------------
# Try to be as Bourne and/or POSIX as possible.
m4_defun([AS_SHELL_SANITIZE],
-[# Be Bourne compatible
+[
+## --------------------- ##
+## M4sh Initialization. ##
+## --------------------- ##
+
+# Be Bourne compatible
if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then
emulate sh
NULLCMD=:
# | IF-FALSE
# | fi
# with simplifications is IF-TRUE and/or IF-FALSE is empty.
+#
+# FIXME: Be n-ary, just as m4_if.
m4_define([AS_IF],
[m4_ifval([$2$3],
[if $1; then
projects / thirdparty / autoconf.git / commitdiff
