1#! @SHELL@
2# -*- shell-script -*-
3# autoheader -- create `config.h.in' from `configure.ac'
4# Copyright 1992, 1993, 1994, 1996, 1998, 1999, 2000, 2001
5# Free Software Foundation, Inc.
6
7# This program is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2, or (at your option)
10# any later version.
11
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15# GNU General Public License for more details.
16
17# You should have received a copy of the GNU General Public License
18# along with this program; if not, write to the Free Software
19# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20# 02111-1307, USA.
21
22# Written by Roland McGrath.
23
24me=`echo "$0" | sed -e 's,.*[/\\],,'`
25
26usage="\
27Usage: $0 [OPTION] ... [TEMPLATE-FILE]
28
29Create a template file of C \`#define' statements for \`configure' to
30use.  To this end, scan TEMPLATE-FILE, or \`configure.ac' if present,
31or else \`configure.in'.
32
33  -h, --help               print this help, then exit
34  -V, --version            print version number, then exit
35  -v, --verbose            verbosely report processing
36  -d, --debug              don't remove temporary files
37  -W, --warnings=CATEGORY  report the warnings falling in CATEGORY
38
39Warning categories include:
40  \`obsolete'      obsolete constructs
41  \`all'           all the warnings
42  \`no-CATEGORY'   turn off the warnings on CATEGORY
43  \`none'          turn off all the warnings
44  \`error'         warnings are error
45
46Library directories:
47  -A, --autoconf-dir=ACDIR  Autoconf's macro files location (rarely needed)
48  -l, --localdir=DIR        location of \`aclocal.m4' and \`acconfig.h'
49
50Report bugs to <bug-autoconf@gnu.org>."
51
52version="\
53autoheader (@PACKAGE_NAME@) @VERSION@
54Written by Roland McGrath.
55
56Copyright 1992, 1993, 1994, 1996, 1998, 1999, 2000, 2001
57Free Software Foundation, Inc.
58This is free software; see the source for copying conditions.  There is NO
59warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
60
61help="\
62Try \`$me --help' for more information."
63
64exit_missing_arg="\
65echo \"$me: option \\\`\$1' requires an argument\" >&2
66echo \"\$help\" >&2
67exit 1"
68
69# NLS nuisances.
70# Only set these to C if already set.  These must not be set unconditionally
71# because not all systems understand e.g. LANG=C (notably SCO).
72# Fixing LC_MESSAGES prevents Solaris sh from translating var values in `set'!
73# Non-C LC_CTYPE values break the ctype check.
74if test "${LANG+set}"   = set; then LANG=C;   export LANG;   fi
75if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
76if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
77if test "${LC_CTYPE+set}"    = set; then LC_CTYPE=C;    export LC_CTYPE;    fi
78
79# Variables.
80: ${autoconf_dir=${AC_MACRODIR=@datadir@}}
81dir=`echo "$0" | sed -e 's,[^/]*$,,'`
82# We test "$dir/autoconf" in case we are in the build tree, in which case
83# the names are not transformed yet.
84for autoconf in "$AUTOCONF" \
85                "$dir/@autoconf-name@" \
86                "$dir/autoconf" \
87                "@bindir@/@autoconf-name@"; do
88  test -f "$autoconf" && break
89done
90debug=false
91localdir=.
92status=0
93tmp=
94verbose=:
95warning_all=false
96warning_error=false
97warning_obsolete=false
98
99# Parse command line.
100while test $# -gt 0 ; do
101  optarg=`expr "x$1" : 'x--[^=]*=\(.*\)' \| \
102               "x$1" : 'x-.\(.*\)'`
103  case $1 in
104    --version | -V )
105       echo "$version" ; exit 0 ;;
106    --help | -h )
107       echo "$usage"; exit 0 ;;
108
109    --debug | -d )
110       debug=:; shift ;;
111    --verbose | -v )
112       verbose=echo
113       shift;;
114
115    --localdir=* | -l?* )
116       localdir=$optarg
117       shift ;;
118    --localdir | -l )
119       test $# = 1 && eval "$exit_missing_arg"
120       shift
121       localdir=$1
122       shift ;;
123
124    --autoconf-dir=* | -A?* )
125      autoconf_dir=$optarg
126       shift ;;
127    --autoconf-dir | -A )
128       test $# = 1 && eval "$exit_missing_arg"
129       shift
130       autoconf_dir=$1
131       shift ;;
132    --macrodir=* | -m?* )
133       echo "$me: warning: --macrodir is obsolete, use --autoconf-dir" >&2
134       autoconf_dir=$optarg
135       shift ;;
136    --macrodir | -m )
137       echo "$me: warning: --macrodir is obsolete, use --autoconf-dir" >&2
138       test $# = 1 && eval "$exit_missing_arg"
139       shift
140       autoconf_dir=$1
141       shift ;;
142
143    --warnings=* | -W?* )
144       warnings=$warnings,$optarg
145       shift ;;
146    --warnings | -W )
147       test $# = 1 && eval "$exit_missing_arg"
148       shift
149       warnings=$warnings,$1
150       shift ;;
151
152    -- )     # Stop option processing
153      shift; break ;;
154    - )     # Use stdin as input.
155      break ;;
156    -* )
157      exec >&2
158      echo "$me: invalid option $1"
159      echo "$help"
160      exit 1 ;;
161    * )
162      break ;;
163  esac
164done
165
166# The warnings are the concatenation of 1. application's defaults
167# (here, none), 2. $WARNINGS, $3 command line options, in that order.
168alphabet='abcdefghijklmnopqrstuvwxyz'
169ALPHABET='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
170_ac_warnings=
171for warning in `IFS=,; echo $WARNINGS,$warnings | tr $ALPHABET $alphabet`
172do
173  case $warning in
174  '' | ,)   continue;;
175  no-*) eval warning_`expr x$warning : 'xno-\(.*\)'`=false;;
176  *)    eval warning_$warning=:;;
177  esac
178done
179
180# Trap on 0 to stop playing with `rm'.
181$debug ||
182{
183  trap 'status=$?; rm -rf $tmp && exit $status' 0
184  trap '(exit 1); exit 1' 1 2 13 15
185}
186
187# Create a (secure) tmp directory for tmp files.
188: ${TMPDIR=/tmp}
189{
190  tmp=`(umask 077 && mktemp -d -q "$TMPDIR/ahXXXXXX") 2>/dev/null` &&
191  test -n "$tmp" && test -d "$tmp"
192}  ||
193{
194  tmp=$TMPDIR/ah$$
195  (umask 077 && mkdir $tmp)
196} ||
197{
198   echo "$me: cannot create a temporary directory in $TMPDIR" >&2
199   (exit 1); exit 1
200}
201
202# Preach.
203if ($warning_all || $warning_obsolete) &&
204    (test -f $config_h.top ||
205     test -f $config_h.bot ||
206     test -f $localdir/acconfig.h); then
207  sed -e "s/^    /$me: WARNING: /" >&2 <<\EOF
208    Using auxiliary files such as `acconfig.h', `config.h.bot'
209    and `config.h.top', to define templates for `config.h.in'
210    is deprecated and discouraged.
211
212    Using the third argument of `AC_DEFINE' and
213    `AC_DEFINE_UNQUOTED' allows to define a template without
214    `acconfig.h':
215
216      AC_DEFINE([NEED_MAIN], 1,
217                [Define if a function `main' is needed.])
218
219    More sophisticated templates can also be produced, see the
220    documentation.
221EOF
222  $warning_error && { (exit 1); exit 1; }
223fi
224
225acconfigs=
226test -r $localdir/acconfig.h && acconfigs="$acconfigs $localdir/acconfig.h"
227
228# Find the input file.
229case $# in
230  0)
231    case `ls configure.ac configure.in 2>/dev/null` in
232      *ac*in )
233        echo "$me: warning: both \`configure.ac' and \`configure.in' are present." >&2
234        echo "$me: warning: proceeding with \`configure.ac'." >&2
235        infile=configure.ac;;
236      *ac ) infile=configure.ac;;
237      *in ) infile=configure.in;;
238      * )
239        echo "$me: no input file" >&2
240        (exit 1); exit 1;;
241    esac;;
242  1) infile=$1 ;;
243  *) exec >&2
244     echo "$me: invalid number of arguments."
245     echo "$help"
246     (exit 1); exit 1;;
247esac
248
249# Set up autoconf.
250autoconf="$autoconf -l $localdir"
251export autoconf_dir
252
253# ----------------------- #
254# Real work starts here.  #
255# ----------------------- #
256
257# Source what the traces are trying to tell us.
258$verbose $me: running $autoconf to trace from $infile >&2
259$autoconf  \
260  --trace AC_CONFIG_HEADERS:': $${config_h="$1"}' \
261  --trace AH_OUTPUT:'ac_verbatim_$1="\
262$2"' \
263  --trace AC_DEFINE_TRACE_LITERAL:'syms="$$syms $1"' \
264  $infile >$tmp/traces.sh || { (exit 1); exit 1; }
265
266$verbose $me: sourcing $tmp/traces.sh >&2
267if (set -e && . $tmp/traces.sh) >/dev/null 2>&1; then
268  . $tmp/traces.sh
269else
270  echo "$me: error: shell error while sourcing $tmp/traces.sh" >&2
271  (exit 1); exit 1
272fi
273
274
275# Make SYMS newline-separated rather than blank-separated, and remove dups.
276# Start each symbol with a blank (to match the blank after "#undef")
277# to reduce the possibility of mistakenly matching another symbol that
278# is a substring of it.
279# Beware that some of the symbols might actually be macro with arguments:
280# keep only their name.
281syms=`for sym in $syms; do echo $sym; done |
282  sed -e 's/(.*//' |
283  sort |
284  uniq |
285  sed -e 's@^@ @'`
286
287
288# We template only the first CONFIG_HEADER.
289config_h=`set X $config_h; echo $2`
290# Support "outfile[:infile]", defaulting infile="outfile.in".
291case "$config_h" in
292"") echo "$me: error: AC_CONFIG_HEADERS not found in $infile" >&2
293    (exit 1); exit 1 ;;
294*:*) config_h_in=`echo "$config_h" | sed 's/.*://'`
295     config_h=`echo "$config_h" | sed 's/:.*//'` ;;
296*) config_h_in="$config_h.in" ;;
297esac
298
299# Don't write "do not edit" -- it will get copied into the
300# config.h, which it's ok to edit.
301cat <<EOF >$tmp/config.hin
302/* $config_h_in.  Generated automatically from $infile by autoheader.  */
303EOF
304
305# Dump the top.
306test -r $config_h.top && cat $config_h.top >>$tmp/config.hin
307
308# Dump `acconfig.h' but its bottom.
309test -r $localdir/acconfig.h &&
310  sed '/@BOTTOM@/,$d;s/@TOP@//' $localdir/acconfig.h >>$tmp/config.hin
311
312# Dump the templates from `configure.ac'.
313for verb in `(set) 2>&1 | sed -n -e '/^ac_verbatim/s/^\([^=]*\)=.*$/\1/p' | sort`; do
314  eval value=\$$verb
315  cat >>$tmp/config.hin <<EOF
316
317$value
318EOF
319done
320
321# Handle the case where @BOTTOM@ is the first line of acconfig.h.
322test -r $localdir/acconfig.h &&
323  grep @BOTTOM@ $localdir/acconfig.h >/dev/null &&
324  sed -n '/@BOTTOM@/,${/@BOTTOM@/!p;}' $localdir/acconfig.h >>$tmp/config.hin
325test -f $config_h.bot && cat $config_h.bot >>$tmp/config.hin
326
327
328# Check that all the symbols have a template.
329$verbose $me: checking completeness of the template >&2
330# Regexp for a white space.
331w='[ 	]'
332if test -n "$syms"; then
333  for sym in $syms; do
334    if egrep "^#$w*[a-z]*$w$w*$sym($w*|$w.*)$" $tmp/config.hin >/dev/null; then
335      : # All is well.
336    else
337      echo "$me: No template for symbol \`$sym'" >&2
338      status=1
339    fi
340  done
341fi
342
343
344# If the run was successful, output the result.
345if test $status = 0; then
346  if test $# = 0; then
347    # Output is a file
348    if test -f $config_h_in && cmp -s $tmp/config.hin $config_h_in; then
349      # File didn't change, so don't update its mod time.
350      echo "$me: $config_h_in is unchanged" >&2
351    else
352      mv -f $tmp/config.hin $config_h_in
353    fi
354  else
355    # Output is stdout
356    cat $tmp/config.hin
357  fi
358fi
359
360(exit $status); exit $status
361