mirror of
git://git.sv.gnu.org/autoconf
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252 lines
7.3 KiB
Bash
252 lines
7.3 KiB
Bash
#! /bin/sh
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# autoheader -- create `config.h.in' from `configure.in'
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# Copyright (C) 1992, 1993, 1994 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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# Written by Roland McGrath.
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# If given no args, create `config.h.in' from template file `configure.in'.
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# With one arg, create a header file on standard output from
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# the given template file.
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usage="\
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Usage: autoheader [-h] [--help] [-m dir] [--macrodir=dir]
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[-l dir] [--localdir=dir] [--version] [template-file]"
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# NLS nuisances.
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# Only set `LANG' and `LC_ALL' to "C" if already set.
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# These must not be set unconditionally because not all systems understand
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# e.g. LANG=C (notably SCO).
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if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
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if test "${LANG+set}" = set; then LANG=C; export LANG; fi
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test -z "${AC_MACRODIR}" && AC_MACRODIR=@datadir@
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test -z "${M4}" && M4=@M4@
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case "${M4}" in
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/*) # Handle the case that m4 has moved since we were configured.
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# It may have been found originally in a build directory.
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test -f "${M4}" || M4=m4 ;;
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esac
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localdir=.
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show_version=no
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while test $# -gt 0 ; do
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case "${1}" in
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-h | --help | --h* )
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echo "${usage}"; exit 0 ;;
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--localdir=* | --l*=* )
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localdir="`echo \"${1}\" | sed -e 's/^[^=]*=//'`"
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shift ;;
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-l | --localdir | --l*)
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shift
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test $# -eq 0 && { echo "${usage}" 1>&2; exit 1; }
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localdir="${1}"
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shift ;;
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--macrodir=* | --m*=* )
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AC_MACRODIR="`echo \"${1}\" | sed -e 's/^[^=]*=//'`"
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shift ;;
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-m | --macrodir | --m* )
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shift
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test $# -eq 0 && { echo "${usage}" 1>&2; exit 1; }
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AC_MACRODIR="${1}"
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shift ;;
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--version | --v* )
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show_version=yes; shift ;;
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-- ) # Stop option processing
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shift; break ;;
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- ) # Use stdin as input.
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break ;;
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-* )
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echo "${usage}" 1>&2; exit 1 ;;
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* )
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break ;;
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esac
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done
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if test $show_version = yes; then
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version=`sed -n 's/define.AC_ACVERSION.[ ]*\([0-9.]*\).*/\1/p' \
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$AC_MACRODIR/acgeneral.m4`
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echo "Autoconf version $version"
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exit 0
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fi
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TEMPLATES="${AC_MACRODIR}/acconfig.h"
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test -r $localdir/acconfig.h && TEMPLATES="${TEMPLATES} $localdir/acconfig.h"
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case $# in
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0) infile=configure.in ;;
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1) infile=$1 ;;
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*) echo "$usage" >&2; exit 1 ;;
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esac
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config_h=config.h
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syms=
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types=
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funcs=
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headers=
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libs=
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if test "$localdir" != .; then
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use_localdir="-I$localdir -DAC_LOCALDIR=$localdir"
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else
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use_localdir=
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fi
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# Use the frozen version of Autoconf if available.
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r= f=
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# Some non-GNU m4's don't reject the --help option, so give them /dev/null.
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case `$M4 --help < /dev/null 2>&1` in
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*reload-state*) test -r $AC_MACRODIR/autoheader.m4f && { r=--reload f=f; } ;;
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*traditional*) ;;
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*) echo Autoconf requires GNU m4 1.1 or later >&2; exit 1 ;;
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esac
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# Extract assignments of SYMS, TYPES, FUNCS, HEADERS, and LIBS from the
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# modified autoconf processing of the input file. The sed hair is
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# necessary to win for multi-line macro invocations.
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eval "`$M4 -I$AC_MACRODIR $use_localdir $r autoheader.m4$f $infile |
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sed -n -e '
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: again
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/^@@@.*@@@$/s/^@@@\(.*\)@@@$/\1/p
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/^@@@/{
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s/^@@@//p
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n
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s/^/@@@/
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b again
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}'`"
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# Make SYMS newline-separated rather than blank-separated, and remove dups.
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# Start each symbol with a blank (to match the blank after "#undef")
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# to reduce the possibility of mistakenly matching another symbol that
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# is a substring of it.
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syms="`for sym in $syms; do echo $sym; done | sort | uniq | sed 's@^@ @'`"
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if test $# -eq 0; then
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tmpout=autoh$$
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trap "rm -f $tmpout; exit 1" 1 2 15
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exec > $tmpout
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fi
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# Support "outfile[:infile]", defaulting infile="outfile.in".
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case "$config_h" in
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*:*) config_h_in=`echo "$config_h"|sed 's%.*:%%'`
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config_h=`echo "$config_h"|sed 's%:.*%%'` ;;
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*) config_h_in="${config_h}.in" ;;
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esac
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# Don't write "do not edit" -- it will get copied into the
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# config.h, which it's ok to edit.
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echo "/* ${config_h_in}. Generated automatically from $infile by autoheader. */"
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test -r ${config_h}.top && cat ${config_h}.top
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test -r $localdir/acconfig.h &&
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grep @TOP@ $localdir/acconfig.h >/dev/null &&
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sed '/@TOP@/,$d' $localdir/acconfig.h
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# This puts each template paragraph on its own line, separated by @s.
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if test -n "$syms"; then
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# Make sure the boundary of template files is also the boundary
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# of the paragraph. Extra newlines don't hurt since they will
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# be removed.
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for t in $TEMPLATES; do cat $t; echo; echo; done |
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# The sed script is suboptimal because it has to take care of
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# some broken seds (e.g. AIX) that remove '\n' from the
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# pattern/hold space if the line is empty. (junio@twinsun.com).
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sed -n -e '
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/^[ ]*$/{
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x
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s/\n/@/g
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p
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s/.*/@/
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x
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}
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H' | sed -e 's/@@*/@/g' |
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# Select each paragraph that refers to a symbol we picked out above.
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fgrep "$syms" |
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tr @ \\012
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fi
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echo "$types" | tr , \\012 | sort | uniq | while read ctype; do
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test -z "$ctype" && continue
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# Solaris 2.3 tr rejects noncontiguous characters in character classes.
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sym="`echo "${ctype}" | tr '[a-z] *' '[A-Z]_P'`"
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echo "
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/* The number of bytes in a ${ctype}. */
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#undef SIZEOF_${sym}"
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done
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# /bin/sh on the Alpha gives `for' a random value if $funcs is empty.
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if test -n "$funcs"; then
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for func in `for x in $funcs; do echo $x; done | sort | uniq`; do
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sym="`echo ${func} | sed 's/[^a-zA-Z0-9_]/_/g' | tr '[a-z]' '[A-Z]'`"
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echo "
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/* Define if you have the ${func} function. */
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#undef HAVE_${sym}"
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done
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fi
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if test -n "$headers"; then
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for header in `for x in $headers; do echo $x; done | sort | uniq`; do
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sym="`echo ${header} | sed 's/[^a-zA-Z0-9_]/_/g' | tr '[a-z]' '[A-Z]'`"
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echo "
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/* Define if you have the <${header}> header file. */
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#undef HAVE_${sym}"
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done
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fi
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if test -n "$libs"; then
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for lib in `for x in $libs; do echo $x; done | sort | uniq`; do
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sym="`echo ${lib} | sed 's/[^a-zA-Z0-9_]/_/g' | tr '[a-z]' '[A-Z]'`"
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echo "
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/* Define if you have the ${lib} library (-l${lib}). */
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#undef HAVE_LIB${sym}"
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done
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fi
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# Handle the case where @BOTTOM@ is the first line of acconfig.h.
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test -r $localdir/acconfig.h &&
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grep @BOTTOM@ $localdir/acconfig.h >/dev/null &&
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sed -n '/@BOTTOM@/,${/@BOTTOM@/!p;}' $localdir/acconfig.h
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test -f ${config_h}.bot && cat ${config_h}.bot
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status=0
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if test -n "$syms"; then
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for sym in $syms; do
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if fgrep $sym $TEMPLATES >/dev/null; then
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: # All is well.
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else
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echo "$0: Symbol \`${sym}' is not covered by $TEMPLATES" >&2
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status=1
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fi
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done
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fi
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if test $# -eq 0; then
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if test $status -eq 0; then
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if cmp -s $tmpout ${config_h_in}; then
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rm -f $tmpout
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else
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mv -f $tmpout ${config_h_in}
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fi
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else
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rm -f $tmpout
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fi
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fi
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exit $status
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