1#! @SHELL@
2# autoheader -- create `config.h.in' from `configure.in'
3# Copyright (C) 1992, 1993, 1994, 1996, 1998 Free Software Foundation, Inc.
4
5# This program is free software; you can redistribute it and/or modify
6# it under the terms of the GNU General Public License as published by
7# the Free Software Foundation; either version 2, or (at your option)
8# any later version.
9
10# This program is distributed in the hope that it will be useful,
11# but WITHOUT ANY WARRANTY; without even the implied warranty of
12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13# GNU General Public License for more details.
14
15# You should have received a copy of the GNU General Public License
16# along with this program; if not, write to the Free Software
17# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
18# 02111-1307, USA.
19
20# Written by Roland McGrath.
21
22# If given no args, create `config.h.in' from template file `configure.in'.
23# With one arg, create a header file on standard output from
24# the given template file.
25
26usage="\
27Usage: autoheader [-h] [--help] [-m dir] [--macrodir=dir]
28       [-l dir] [--localdir=dir] [--version] [template-file]"
29
30# NLS nuisances.
31# Only set these to C if already set.  These must not be set unconditionally
32# because not all systems understand e.g. LANG=C (notably SCO).
33# Fixing LC_MESSAGES prevents Solaris sh from translating var values in `set'!
34# Non-C LC_CTYPE values break the ctype check.
35if test "${LANG+set}"   = set; then LANG=C;   export LANG;   fi
36if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
37if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
38if test "${LC_CTYPE+set}"    = set; then LC_CTYPE=C;    export LC_CTYPE;    fi
39
40test -z "${AC_MACRODIR}" && AC_MACRODIR=@datadir@
41test -z "${M4}" && M4=@M4@
42case "${M4}" in
43/*) # Handle the case that m4 has moved since we were configured.
44    # It may have been found originally in a build directory.
45    test -f "${M4}" || M4=m4 ;;
46esac
47
48localdir=.
49show_version=no
50
51while test $# -gt 0 ; do
52   case "${1}" in
53      -h | --help | --h* )
54         echo "${usage}"; exit 0 ;;
55      --localdir=* | --l*=* )
56         localdir="`echo \"${1}\" | sed -e 's/^[^=]*=//'`"
57         shift ;;
58      -l | --localdir | --l*)
59         shift
60         test $# -eq 0 && { echo "${usage}" 1>&2; exit 1; }
61         localdir="${1}"
62         shift ;;
63      --macrodir=* | --m*=* )
64         AC_MACRODIR="`echo \"${1}\" | sed -e 's/^[^=]*=//'`"
65         shift ;;
66      -m | --macrodir | --m* )
67         shift
68         test $# -eq 0 && { echo "${usage}" 1>&2; exit 1; }
69         AC_MACRODIR="${1}"
70         shift ;;
71      --version | --v* )
72         show_version=yes; shift ;;
73      -- )     # Stop option processing
74        shift; break ;;
75      - )	# Use stdin as input.
76        break ;;
77      -* )
78        echo "${usage}" 1>&2; exit 1 ;;
79      * )
80        break ;;
81   esac
82done
83
84if test $show_version = yes; then
85  version=`sed -n 's/define.AC_ACVERSION.[ 	]*\([0-9.]*\).*/\1/p' \
86    $AC_MACRODIR/acgeneral.m4`
87  echo "Autoconf version $version"
88  exit 0
89fi
90
91TEMPLATES="${AC_MACRODIR}/acconfig.h"
92test -r $localdir/acconfig.h && TEMPLATES="${TEMPLATES} $localdir/acconfig.h"
93
94case $# in
95  0) infile=configure.in ;;
96  1) infile=$1 ;;
97  *) echo "$usage" >&2; exit 1 ;;
98esac
99
100config_h=config.h
101syms=
102types=
103funcs=
104headers=
105libs=
106
107if test "$localdir" != .; then
108  use_localdir="-I$localdir -DAC_LOCALDIR=$localdir"
109else
110  use_localdir=
111fi
112
113# Use the frozen version of Autoconf if available.
114r= f=
115# Some non-GNU m4's don't reject the --help option, so give them /dev/null.
116case `$M4 --help < /dev/null 2>&1` in
117*reload-state*) test -r $AC_MACRODIR/autoheader.m4f && { r=--reload f=f; } ;;
118*traditional*) ;;
119*) echo Autoconf requires GNU m4 1.1 or later >&2; exit 1 ;;
120esac
121
122# Extract assignments of SYMS, TYPES, FUNCS, HEADERS, and LIBS from the
123# modified autoconf processing of the input file.  The sed hair is
124# necessary to win for multi-line macro invocations.
125eval "`$M4 -I$AC_MACRODIR $use_localdir $r autoheader.m4$f $infile |
126       sed -n -e '
127		: again
128		/^@@@.*@@@$/s/^@@@\(.*\)@@@$/\1/p
129		/^@@@/{
130			s/^@@@//p
131			n
132			s/^/@@@/
133			b again
134		}'`"
135
136# Make SYMS newline-separated rather than blank-separated, and remove dups.
137# Start each symbol with a blank (to match the blank after "#undef")
138# to reduce the possibility of mistakenly matching another symbol that
139# is a substring of it.
140syms="`for sym in $syms; do echo $sym; done | sort | uniq | sed 's@^@ @'`"
141
142if test $# -eq 0; then
143  tmpout=autoh$$
144  trap "rm -f $tmpout; exit 1" 1 2 15
145  exec > $tmpout
146fi
147
148# Support "outfile[:infile]", defaulting infile="outfile.in".
149case "$config_h" in
150*:*) config_h_in=`echo "$config_h"|sed 's%.*:%%'`
151     config_h=`echo "$config_h"|sed 's%:.*%%'` ;;
152*) config_h_in="${config_h}.in" ;;
153esac
154
155# Don't write "do not edit" -- it will get copied into the
156# config.h, which it's ok to edit.
157cat <<EOF
158/* ${config_h_in}.  Generated automatically from $infile by autoheader.  */
159EOF
160
161test -r ${config_h}.top && cat ${config_h}.top
162test -r $localdir/acconfig.h &&
163  grep @TOP@ $localdir/acconfig.h >/dev/null &&
164  sed '/@TOP@/,$d' $localdir/acconfig.h
165
166# This puts each template paragraph on its own line, separated by @s.
167if test -n "$syms"; then
168  # Make sure the boundary of template files is also the boundary
169  # of the paragraph.  Extra newlines don't hurt since they will
170  # be removed.
171  # Undocumented useless feature: stuff outside of @TOP@ and @BOTTOM@ 
172  # is ignored in the systemwide acconfig.h too.
173  for t in $TEMPLATES; do
174    sedscript=""
175    grep @TOP@ $t >/dev/null && sedscript="1,/@TOP@/d;"
176    grep @BOTTOM@ $t >/dev/null && sedscript="$sedscript /@BOTTOM@/,\$d;"
177    # This substitution makes "#undef<TAB>FOO" in acconfig.h work.
178    sed -n -e "$sedscript s/	/ /g; p" $t
179    echo; echo
180  done |
181  # The sed script is suboptimal because it has to take care of
182  # some broken seds (e.g. AIX) that remove '\n' from the
183  # pattern/hold space if the line is empty. (junio@twinsun.com).
184  sed -n -e '
185	/^[ 	]*$/{
186		x
187		s/\n/@/g
188		p
189		s/.*/@/
190		x
191	}
192	H' | sed -e 's/@@*/@/g' |
193  # Select each paragraph that refers to a symbol we picked out above.
194  # Some fgrep's have limits on the number of lines that can be in the
195  # pattern on the command line, so use a temporary file containing the
196  # pattern.
197  (fgrep_tmp=${TMPDIR-/tmp}/autoh$$
198   trap "rm -f $fgrep_tmp; exit 1" 1 2 15
199   cat > $fgrep_tmp <<EOF
200$syms
201EOF
202   fgrep -f $fgrep_tmp
203   rm -f $fgrep_tmp) |
204  tr @ \\012
205fi
206
207echo "$types" | tr , \\012 | sort | uniq | while read ctype; do
208  test -z "$ctype" && continue
209  sym="`echo "${ctype}" | tr 'abcdefghijklmnopqrstuvwxyz *' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_P'`"
210  echo "
211/* The number of bytes in a ${ctype}.  */
212#undef SIZEOF_${sym}"
213done
214
215# /bin/sh on the Alpha gives `for' a random value if $funcs is empty.
216if test -n "$funcs"; then
217  for func in `for x in $funcs; do echo $x; done | sort | uniq`; do
218    sym="`echo ${func} | sed 's/[^a-zA-Z0-9_]/_/g' | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`"
219    echo "
220/* Define if you have the ${func} function.  */
221#undef HAVE_${sym}"
222  done
223fi
224
225if test -n "$headers"; then
226  for header in `for x in $headers; do echo $x; done | sort | uniq`; do
227
228    sym="`echo ${header} | sed 's/[^a-zA-Z0-9_]/_/g' | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`"
229    echo "
230/* Define if you have the <${header}> header file.  */
231#undef HAVE_${sym}"
232  done
233fi
234
235if test -n "$libs"; then
236  for lib in `for x in $libs; do echo $x; done | sort | uniq`; do
237   sym="`echo ${lib} | sed 's/[^a-zA-Z0-9_]/_/g' | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`"
238    echo "
239/* Define if you have the ${lib} library (-l${lib}).  */
240#undef HAVE_LIB${sym}"
241  done
242fi
243
244if test -n "$verbatim"; then
245  echo "$verbatim"
246fi
247
248# Handle the case where @BOTTOM@ is the first line of acconfig.h.
249test -r $localdir/acconfig.h &&
250  grep @BOTTOM@ $localdir/acconfig.h >/dev/null &&
251  sed -n '/@BOTTOM@/,${/@BOTTOM@/!p;}' $localdir/acconfig.h
252test -f ${config_h}.bot && cat ${config_h}.bot
253
254status=0
255
256if test -n "$syms"; then
257  for sym in $syms; do
258    if fgrep $sym $TEMPLATES >/dev/null; then
259      : # All is well.
260    else
261      echo "$0: Symbol \`${sym}' is not covered by $TEMPLATES" >&2
262      status=1
263    fi
264  done
265fi
266
267if test $# -eq 0; then
268  if test $status -eq 0; then
269    if test -f ${config_h_in} && cmp -s $tmpout ${config_h_in}; then
270      rm -f $tmpout # File didn't change, so don't update its mod time.
271    else
272      mv -f $tmpout ${config_h_in}
273    fi
274  else
275    rm -f $tmpout
276  fi
277fi
278
279exit $status
280