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autoheader.sh
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Linux/UNIX/POSIX Shell Script
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1994-06-12
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7KB
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236 lines
#!/bin/sh
# autoheader -- create `config.h.in' from `configure.in'
# Copyright (C) 1992, 1993, 1994 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., 675 Mass Ave, Cambridge, MA 02139, USA.
# Written by Roland McGrath.
# If given no args, create `config.h.in' from template file `configure.in'.
# With one arg, create a header file on standard output from
# the given template file.
usage="Usage: autoheader [-h] [--help] [-m dir] [--macrodir=dir]
[-v] [--version] [template-file]"
# NLS nuisances.
# These must not be set unconditionally because not all systems understand
# e.g. LANG=C (notably SCO).
if test "${LC_ALL+set}" = 'set' ; then LC_ALL=C; export LC_ALL; fi
if test "${LANG+set}" = 'set' ; then LANG=C; export LANG; fi
test -z "${AC_MACRODIR}" && AC_MACRODIR=@datadir@
test -z "${M4}" && M4=@M4@
case "${M4}" in
/*) # Handle the case that m4 has moved since we were configured.
# It may have been found originally in a build directory.
test -f "${M4}" || M4=m4 ;;
esac
print_version=""
while test $# -gt 0 ; do
case "z${1}" in
z-h | z--help | z--h* )
/bin/echo "${usage}"; exit 0 ;;
z--macrodir=* | z--m*=* )
AC_MACRODIR="`/bin/echo \"${1}\" | sed -e 's/^[^=]*=//'`"
shift ;;
z-m | z--macrodir | z--m* )
shift
test $# -eq 0 && { /bin/echo "${usage}" 1>&2; exit 1; }
AC_MACRODIR="${1}"
shift ;;
z-v | z--version | z--v* )
print_version="-DAC_PRINT_VERSION"
shift ;;
z-- ) # Stop option processing
shift; break ;;
z- ) # Use stdin as input.
break ;;
z-* )
/bin/echo "${usage}" 1>&2; exit 1 ;;
* )
break ;;
esac
done
TEMPLATES="${AC_MACRODIR}/acconfig.h"
test -r acconfig.h && TEMPLATES="${TEMPLATES} acconfig.h"
MACROFILES="${AC_MACRODIR}/acgeneral.m4 ${AC_MACRODIR}/acspecific.m4"
test -r ${AC_MACRODIR}/aclocal.m4 \
&& MACROFILES="${MACROFILES} ${AC_MACRODIR}/aclocal.m4"
test -r aclocal.m4 && MACROFILES="${MACROFILES} aclocal.m4"
MACROFILES="${print_version} ${MACROFILES}"
case $# in
0) if test -n "$print_version"
then infile=/dev/null
else infile=configure.in; fi ;;
1) infile=$1 ;;
*) /bin/echo "$usage" >&2; exit 1 ;;
esac
# These are the alternate definitions of the acgeneral.m4 macros we want to
# redefine. They produce strings in the output marked with "@@@" so we can
# easily extract the information we want. The `#' at the end of the first
# line of each definition seems to be necessary to prevent m4 from eating
# the newline, which makes the @@@ not always be at the beginning of a line.
frob='define([AC_DEFINE],[#
@@@syms="$syms $1"@@@
])dnl
define([AC_SIZEOF_TYPE],[#
@@@types="$types,$1"@@@
])dnl
define([AC_HAVE_FUNCS],[#
@@@funcs="$funcs $1"@@@
])dnl
define([AC_HAVE_HEADERS],[#
@@@headers="$headers $1"@@@
])dnl
define([AC_CONFIG_HEADER],[#
@@@config_h=$1@@@
])dnl
define([AC_HAVE_LIBRARY], [#
changequote(/,/)dnl
define(/libname/, dnl
patsubst(patsubst($1, /lib\([^\.]*\)\.a/, /\1/), /-l/, //))dnl
changequote([,])dnl
@@@libs="$libs libname"@@@
# If it was found, we do:
$2
# If it was not found, we do:
$3
])dnl
'
config_h=config.h
syms=
types=
funcs=
headers=
libs=
# We extract assignments of SYMS, TYPES, FUNCS, HEADERS, and LIBS from the
# modified autoconf processing of the input file. The sed hair is
# necessary to win for multi-line macro invocations.
eval "`/bin/echo \"$frob\" \
| $M4 $MACROFILES - $infile \
| sed -n -e '
: again
/^@@@.*@@@$/s/^@@@\(.*\)@@@$/\1/p
/^@@@/{
s/^@@@//p
n
s/^/@@@/
b again
}'`"
test -n "$print_version" && exit 0
# Make SYMS newline-separated rather than blank-separated, and remove dups.
syms="`for sym in $syms; do /bin/echo $sym; done | sort | uniq`"
if test $# -eq 0; then
tmpout=autoh$$
trap "rm -f $tmpout; exit 1" 1 2 15
exec > $tmpout
fi
# Don't write "do not edit" -- it will get copied into the
# config.h, which it's ok to edit.
/bin/echo "/* ${config_h}.in. Generated automatically from $infile by autoheader. */"
test -f ${config_h}.top && cat ${config_h}.top
# This puts each paragraph on its own line, separated by @s.
if test -n "$syms"; then
# Make sure the boundary of template files is also the boundary
# of the paragraph. Extra newlines don't hurt since they will
# be removed.
for t in $TEMPLATES; do cat $t; /bin/echo; /bin/echo; done |
# The sed script is suboptimal because it has to take care of
# some broken seds (e.g. AIX) that remove '\n' from the
# pattern/hold space if the line is empty. (junio@twinsun.com).
sed -n -e '
/^[ ]*$/{
x
s/\n/@/g
p
s/.*/@/
x
}
H' | sed -e 's/@@*/@/g' |
# Select each paragraph that refers to a symbol we picked out above.
fgrep "$syms" |
tr @ \\012
fi
/bin/echo "$types" | tr , \\012 | sort | uniq | while read ctype; do
test -z "$ctype" && continue
# Solaris 2.3 tr rejects noncontiguous characters in character classes.
sym="`/bin/echo "${ctype}" | tr '[a-z] *' '[A-Z]_P'`"
/bin/echo "
/* The number of bytes in a ${ctype}. */
#undef SIZEOF_${sym}"
done
for func in `for x in $funcs; do /bin/echo $x; done | sort | uniq`; do
sym="`/bin/echo ${func} | sed 's/[^a-zA-Z0-9_]/_/g' | tr '[a-z]' '[A-Z]'`"
/bin/echo "
/* Define if you have ${func}. */
#undef HAVE_${sym}"
done
for header in `for x in $headers; do /bin/echo $x; done | sort | uniq`; do
sym="`/bin/echo ${header} | sed 's/[^a-zA-Z0-9_]/_/g' | tr '[a-z]' '[A-Z]'`"
/bin/echo "
/* Define if you have the <${header}> header file. */
#undef HAVE_${sym}"
done
for lib in `for x in $libs; do /bin/echo $x; done | sort | uniq`; do
sym="`/bin/echo ${lib} | sed 's/[^a-zA-Z0-9_]/_/g' | tr '[a-z]' '[A-Z]'`"
/bin/echo "
/* Define if you have the ${lib} library (-l${lib}). */
#undef HAVE_LIB${sym}"
done
test -f ${config_h}.bot && cat ${config_h}.bot
status=0
for sym in $syms; do
if fgrep $sym $TEMPLATES >/dev/null; then
: # All is well.
else
/bin/echo "$0: Symbol \`${sym}' is not covered by $TEMPLATES" >&2
status=1
fi
done
if test $# -eq 0; then
if test $status -eq 0; then
if cmp -s $tmpout ${config_h}.in; then
rm -f $tmpout
else
mv -f $tmpout ${config_h}.in
fi
else
rm -f $tmpout
fi
fi
exit $status