include(m4sugar.m4)# -*- Autoconf -*- # This file is part of Autoconf. # M4 sugar for common shell constructs. # Requires GNU M4 and M4sugar. # Copyright 2000 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) # 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, 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 # General Public License when using or distributing such scripts, even # though portions of the text of Autoconf appear in them. The GNU # General Public License (GPL) does govern all other use of the material # that constitutes the Autoconf program. # # Certain portions of the Autoconf source text are designed to be copied # (in certain cases, depending on the input) into the output of # Autoconf. We call these the "data" portions. The rest of the Autoconf # source text consists of comments plus executable code that decides which # of the data portions to output in any given case. We call these # comments and executable code the "non-data" portions. Autoconf never # copies any of the non-data portions into its output. # # This special exception to the GPL applies to versions of Autoconf # released by the Free Software Foundation. When you make and # distribute a modified version of Autoconf, you may extend this special # exception to the GPL to apply to your modified version as well, *unless* # your modified version has the potential to copy into its output some # of the text that was the non-data portion of the version that you started # with. (In other words, unless your change moves or copies text from # the non-data portions to the data portions.) If your modification has # such potential, you must delete any notice of this special exception # to the GPL from your modified version. # # Written by Akim Demaille, Pavel Roskin, Alexandre Oliva, Lars J. Aas # and many other people. ## ------------------------- ## ## 1. Sanitizing the shell. ## ## ------------------------- ## # AS_SHELL_SANITIZE # ----------------- # Try to be as Bourne and/or POSIX as possible. m4_defun([AS_SHELL_SANITIZE], [# Be Bourne compatible if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then emulate sh NULLCMD=: elif test -n "${BASH_VERSION+set}" && (set -o posix) >/dev/null 2>&1; then set -o posix fi _AS_EXPR_PREPARE _AS_UNSET_PREPARE # NLS nuisances. AS_UNSET([LANG], [C]) AS_UNSET([LC_ALL], [C]) AS_UNSET([LC_TIME], [C]) AS_UNSET([LC_CTYPE], [C]) AS_UNSET([LANGUAGE], [C]) AS_UNSET([LC_COLLATE], [C]) AS_UNSET([LC_NUMERIC], [C]) AS_UNSET([LC_MESSAGES], [C]) # IFS # We need space, tab and new line, in precisely that order. ac_nl=' ' IFS=" $ac_nl" # CDPATH. AS_UNSET([CDPATH], [:]) ]) ## ----------------------------- ## ## 2. Wrappers around builtins. ## ## ----------------------------- ## # This section is lexicographically sorted. # AS_EXIT([EXIT-CODE = 1]) # ------------------------ # Exit and set exit code to EXIT-CODE in the way that it's seen # within "trap 0". # # We cannot simply use "exit N" because some shells (zsh and Solaris sh) # will not set $? to N while running the code set by "trap 0" # So we set $? by executing "exit N" in the subshell and then exit. m4_define([AS_EXIT], [{ (exit m4_default([$1], 1)); exit; }]) # AS_IFELSE(TEST, [IF-TRUE], [IF-FALSE]) # -------------------------------------- # Expand into # | if TEST; then # | IF-TRUE # | else # | IF-FALSE # | fi # with simplifications is IF-TRUE and/or IF-FALSE is empty. m4_define([AS_IFELSE], [m4_ifval([$2$3], [if $1; then m4_ifval([$2], [$2], :) m4_ifvaln([$3], [else $3])dnl fi ])dnl ])# AS_IFELSE # _AS_UNSET_PREPARE # ----------------- # AS_UNSET depends upon $as_unset: compute it. m4_defun([_AS_UNSET_PREPARE], [# Support unset when possible. if (FOO=FOO; unset FOO) >/dev/null 2>&1; then as_unset=unset else as_unset=false fi ]) # AS_UNSET(VAR, [VALUE-IF-UNSET-NOT-SUPPORTED = `']) # -------------------------------------------------- # Try to unset the env VAR, otherwise set it to # VALUE-IF-UNSET-NOT-SUPPORTED. `ac_unset' must have been computed. m4_defun([AS_UNSET], [m4_require([_AS_UNSET_PREPARE])dnl $as_unset $1 || test "${$1+set}" != set || { $1=$2; export $1; }]) ## ------------------------------------------ ## ## 3. Error and warnings at the shell level. ## ## ------------------------------------------ ## # If AS_MESSAGE_LOG_FD is defined, shell messages are duplicated there # too. # _AS_QUOTE_IFELSE(STRING, IF-MODERN-QUOTATION, IF-OLD-QUOTATION) # --------------------------------------------------------------- # Compatibility glue between the old AS_MSG suite which did not # quote anything, and the modern suite which quotes the quotes. # If STRING contains `\\' or `\$', it's modern. # If STRING contains `\"' or `\`', it's old. # Otherwise it's modern. # We use two quotes in the pattern to keep highlighting tools at peace. m4_define([_AS_QUOTE_IFELSE], [m4_if(m4_regexp([$1], [\\[\\$]]), [-1], [m4_if(m4_regexp([$1], [\\[`""]]), [-1], [$2], [$3])], [$2])]) # _AS_ECHO_UNQUOTED(STRING, [FD = AS_MESSAGE_FD]) # --------------------------------------------------- # Perform shell expansions on STRING and echo the string to FD. m4_define([_AS_ECHO_UNQUOTED], [echo "$1" >&m4_default([$2], [AS_MESSAGE_FD])]) # _AS_QUOTE(STRING) # ----------------- # If there are quoted (via backslash) backquotes do nothing, else # backslash all the quotes. # FIXME: In a distant future (2.51 or +), this warning should be # classified as `syntax'. It is classified as `obsolete' to ease # the transition (for Libtool for instance). m4_define([_AS_QUOTE], [_AS_QUOTE_IFELSE([$1], [m4_patsubst([$1], [\([`""]\)], [\\\1])], [m4_warn([obsolete], [back quotes and double quotes should not be escaped in: $1])dnl $1])]) # _AS_ECHO(STRING, [FD = AS_FD_MSG]) # ---------------------------------- # Protect STRING from backquote expansion, echo the result to FD. m4_define([_AS_ECHO], [_AS_ECHO_UNQUOTED([_AS_QUOTE([$1])], $2)]) # AS_MESSAGE(STRING, [FD = AS_MESSAGE_FD]) # -------------------------------------------- m4_define([AS_MESSAGE], [m4_ifset([AS_MESSAGE_LOG_FD], [{ _AS_ECHO([$as_me:__oline__: $1], [AS_MESSAGE_LOG_FD]) _AS_ECHO($@);}], [_AS_ECHO($@)])[]dnl ]) # AS_WARN(PROBLEM) # ---------------- m4_define([AS_WARN], [m4_ifset([AS_MESSAGE_LOG_FD], [{ _AS_ECHO([$as_me:__oline__: WARNING: $1], [AS_MESSAGE_LOG_FD]) _AS_ECHO([$as_me: warning: $1], 2); }], [_AS_ECHO([$as_me: warning: $1], 2)])[]dnl ])# AS_WARN # AS_ERROR(ERROR, [EXIT-STATUS = 1]) # ---------------------------------- m4_define([AS_ERROR], [{m4_ifset([AC_LOG_FD], [_AS_ECHO([$as_me:__oline__: error: $1], [AS_MESSAGE_LOG_FD]) ])[]dnl _AS_ECHO([$as_me: error: $1], 2) AS_EXIT([$2]); }[]dnl ])# AS_ERROR ## -------------------------------------- ## ## 4. Portable versions of common tools. ## ## -------------------------------------- ## # This section is lexicographically sorted. # AS_DIRNAME(PATHNAME) # -------------------- # Simulate running `dirname(1)' on PATHNAME, not all systems have it. # This macro must be usable from inside ` `. # # Prefer expr to echo|sed, since expr is usually faster and it handles # backslashes and newlines correctly. However, older expr # implementations (e.g. SunOS 4 expr and Solaris 8 /usr/ucb/expr) have # a silly length limit that causes expr to fail if the matched # substring is longer than 120 bytes. So fall back on echo|sed if # expr fails. # # FIXME: Please note the following m4_require is quite wrong: if the first # occurrence of AS_DIRNAME_EXPR is in a backquoted expression, the # shell will be lost. We might have to introduce diversions for # setting up an M4sh script: required macros will then be expanded there. m4_defun([AS_DIRNAME_EXPR], [m4_require([_AS_EXPR_PREPARE])dnl $as_expr X[]$1 : 'X\(.*[[^/]]\)//*[[^/][^/]]*/*$' \| \ X[]$1 : 'X\(//\)[[^/]]' \| \ X[]$1 : 'X\(//\)$' \| \ X[]$1 : 'X\(/\)' \| \ . : '\(.\)']) m4_defun([AS_DIRNAME_SED], [echo X[]$1 | sed ['/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{ s//\1/; q; } /^X\(\/\/\)[^/].*/{ s//\1/; q; } /^X\(\/\/\)$/{ s//\1/; q; } /^X\(\/\).*/{ s//\1/; q; } s/.*/./; q']]) m4_defun([AS_DIRNAME], [AS_DIRNAME_EXPR([$1]) 2>/dev/null || AS_DIRNAME_SED([$1])]) # _AS_EXPR_PREPARE # ---------------- # Some expr work properly (i.e. compute and issue the right result), # but exit with failure. When a fall back to expr (as in AS_DIRNAME) # is provided, you get twice the result. Prevent this. m4_defun([_AS_EXPR_PREPARE], [if expr a : '\(a\)' >/dev/null 2>&1; then as_expr=expr else as_expr=false fi[]dnl ])# _AS_EXPR_PREPARE # AS_MKDIR_P(PATH) # ---------------- # Emulate `mkdir -p' with plain `mkdir'. m4_define([AS_MKDIR_P], [{ case $1 in [[\\/]]* | ?:[[\\/]]* ) ac_incr_dir=;; *) ac_incr_dir=.;; esac ac_dummy=$1 for ac_mkdir_dir in `IFS=/; set X $ac_dummy; shift; echo "$[@]"`; do ac_incr_dir=$ac_incr_dir/$ac_mkdir_dir test -d $ac_incr_dir || mkdir $ac_incr_dir done; } ])# AS_MKDIR_P ## ------------------ ## ## 5. Common idioms. ## ## ------------------ ## # This section is lexicographically sorted. # AS_TMPDIR(PREFIX) # ----------------- # Create as safely as possible a temporary directory which name is # inspired by PREFIX (should be 2-4 chars max), and set trap # mechanisms to remove it. m4_define([AS_TMPDIR], [# Create a temporary directory, and hook for its removal unless debugging. $debug || { trap 'exit_status=$?; rm -rf $tmp && exit $exit_status' 0 trap 'AS_EXIT([$?])' 1 2 13 15 } # Create a (secure) tmp directory for tmp files. : ${TMPDIR=/tmp} { tmp=`(umask 077 && mktemp -d -q "$TMPDIR/$1XXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" } || { tmp=$TMPDIR/$1$$-$RANDOM (umask 077 && mkdir $tmp) } || { echo "$me: cannot create a temporary directory in $TMPDIR" >&2 AS_EXIT }dnl ])# AS_TMPDIR