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63ff24b580
autoconf/autoconf.in
Akim Demaille 63ff24b580 * autoconf.sh: Proprerly report names of unexpanded macros that 
begin with an underscore
2000-09-11 07:16:34 +00:00

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#! @SHELL@
# autoconf -- create `configure' using m4 macros
# Copyright (C) 1992, 93, 94, 96, 99, 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.
# If given no args, create `configure' from template file `configure.in'.
# With one arg, create a configure script on standard output from
# the given template file.
me=`echo "$0" | sed -e 's,.*/,,'`
usage="\
Usage: $0 [OPTION] ... [TEMPLATE-FILE]
Generate a configuration script from a TEMPLATE-FILE if given, or
\`configure.in' by default. Output is sent to the standard output if
TEMPLATE-FILE is given, else into \`configure'.
Operation modes:
-h, --help print this help, then exit
-V, --version print version number, then exit
-v, --verbose verbosely report processing
-d, --debug don't remove temporary files
-m, --macrodir=DIR directory storing Autoconf's macro files
-l, --localdir=DIR directory storing the \`aclocal.m4' file
-o, --output=FILE save output in FILE (stdout is the default)
-W, --warnings=CATEGORY report the warnings falling in CATEGORY [syntax]
Warning categories include:
\`cross' cross compilation issues
\`obsolete' obsolete constructs
\`syntax' dubious syntactic constructs
\`all' all the warnings
\`no-CATEGORY' turn off the warnings on CATEGORY
\`none' turn off all the warnings
\`error' warnings are error
The environment variable \`WARNINGS' is honored.
Tracing:
-t, --trace=MACRO report the list of calls to MACRO
-i, --initialization also trace Autoconf's initialization process
In tracing mode, no configuration script is created.
Report bugs to <bug-autoconf@gnu.org>."
version="\
autoconf (GNU @PACKAGE@) @VERSION@
Written by David J. MacKenzie.
Copyright (C) 1992, 93, 94, 96, 99, 2000 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
help="\
Try \`$me --help' for more information."
exit_missing_arg="\
echo \"$me: option \\\`\$1' requires an argument\" >&2
echo \"\$help\" >&2
exit 1"
# NLS nuisances.
if test "${LANG+set}" = set; then LANG=C; export LANG; fi
if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
if test "${LC_CTYPE+set}" = set; then LC_CTYPE=C; export LC_CTYPE; fi
if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
# ac_LF_and_DOT
# We use echo to avoid assuming a particular line-breaking character.
# The extra dot is to prevent the shell from consuming trailing
# line-breaks from the sub-command output. A line-break within
# single-quotes doesn't work because, if this script is created in a
# platform that uses two characters for line-breaks (e.g., DOS), tr
# would break.
ac_LF_and_DOT=`echo; echo .`
# Find GNU m4.
# Handle the case that m4 has moved since we were configured.
# It may have been found originally in a build directory.
: ${M4=@M4@}
case "$M4" in
/*) test -f "$M4" || M4=m4 ;;
esac
# Some non-GNU m4's don't reject the --help option, so give them /dev/null.
case `$M4 --help </dev/null 2>&1` in
*reload-state*);;
*) echo "$me: Autoconf requires GNU m4 1.4 or later" >&2; exit 1 ;;
esac
# Variables.
: ${autoconf_dir=${AC_MACRODIR=@datadir@}}
: ${AC_ACLOCALDIR=`(aclocal --print-ac-dir) 2>/dev/null`}
: ${AWK=@AWK@}
debug=false
# Trace Autoconf's initialization?
initialization=false
localdir=.
outfile=
# Exit status.
status=0
# Tasks:
# - trace
# Trace the first arguments of some macros
# - script
# Produce the configure script (default)
task=script
tmp=
verbose=:
# Parse command line.
while test $# -gt 0 ; do
optarg=`expr "$1" : '--[^=]*=\(.*\)' \| \
"$1" : '-.\(.*\)'`
case $1 in
--version | --vers* | -V )
echo "$version" ; exit 0 ;;
--help | --h* | -h )
echo "$usage"; exit 0 ;;
--debug | --d* | -d )
debug=:; shift ;;
--verbose | --verb* | -v )
verbose=echo
shift;;
--localdir=* | --l*=* )
localdir=$optarg
shift ;;
--localdir | --l* | -l )
test $# = 1 && eval "$exit_missing_arg"
shift
localdir=$1
shift ;;
--autoconf-dir=*)
autoconf_dir=$optarg
shift ;;
--autoconf-dir | -A* )
test $# = 1 && eval "$exit_missing_arg"
shift
autoconf_dir=$1
shift ;;
--macrodir=* | --m*=* )
echo "$me: warning: --macrodir is obsolete, use --autoconf-dir" >&1
autoconf_dir=$optarg
shift ;;
--macrodir | --m* | -m )
echo "$me: warning: --macrodir is obsolete, use --autoconf-dir" >&1
test $# = 1 && eval "$exit_missing_arg"
shift
autoconf_dir=$1
shift ;;
--trace | -t )
test $# = 1 && eval "$exit_missing_arg"
task=trace
shift
traces="$traces '"`echo "$1" | sed "s/'/'\\\\\\\\''/g"`"'"
shift ;;
--trace=* )
task=trace
traces="$traces '"`echo "$optarg" | sed "s/'/'\\\\\\\\''/g"`"'"
shift ;;
--initialization | -i )
initialization=:
shift;;
--output | -o )
test $# = 1 && eval "$exit_missing_arg"
shift
outfile=$1
shift ;;
--output=* )
outfile=$optarg
shift ;;
-o* )
outfile=$optarg
shift ;;
--warnings | -W )
test $# = 1 && eval "$exit_missing_arg"
shift
warnings=$warnings,$1
shift ;;
--warnings=* | -W* )
warnings=$warnings,$optarg
shift ;;
-- ) # Stop option processing
shift; break ;;
- ) # Use stdin as input.
break ;;
-* )
exec >&2
echo "$me: invalid option $1"
echo "$help"
exit 1 ;;
* )
break ;;
esac
done
# The warnings are the concatenation of 1. application's defaults,
# 2. $WARNINGS, $3 command line options, in that order.
# Set them in the order expected by the M4 macros: the converse.
alphabet='abcdefghijklmnopqrstuvwxyz'
ALPHABET='ABCDEFGHIJKLMNOPQRSTUVWXYZ'
_ac_warnings=
for warning in `IFS=,; echo syntax,$WARNINGS,$warnings |
tr $ALPHABET $alphabet`
do
test -n $warning || continue
_ac_warnings="$warning"`test -n "$_ac_warnings" && echo ",$_ac_warnings"`
done
# Trap on 0 to stop playing with `rm'.
$debug ||
{
trap 'status=$?; rm -rf $tmp && exit $status' 0
trap '(exit $?); exit' 1 2 13 15
}
# Create a (secure) tmp directory for tmp files.
: ${TMPDIR=/tmp}
{
tmp=`(umask 077 && mktemp -d -q "$TMPDIR/acXXXXXX") 2>/dev/null` &&
test -n "$tmp" && test -d "$tmp"
} ||
{
tmp=$TMPDIR/ac$$ && (umask 077 && mkdir $tmp)
} ||
{
echo "$me: cannot create a temporary directory in $TMPDIR" >&2
(exit 1); exit;
}
# Running m4.
test -f "$autoconf_dir/acsite.m4" && acsite_m4="$autoconf_dir/acsite.m4"
test -f "$localdir/aclocal.m4" && aclocal_m4="$localdir/aclocal.m4"
m4_common="$acsite_m4 $aclocal_m4 -I $autoconf_dir -I $localdir"
run_m4="$M4 $autoconf_dir/autoconf.m4 $m4_common"
run_m4f="$M4 --reload $autoconf_dir/autoconf.m4f $m4_common"
# Find the input file.
case $# in
0) infile=configure.in
test $task = script && test -z "$outfile" && outfile=configure;;
1) infile=$1 ;;
*) exec >&2
echo "$me: invalid number of arguments."
echo "$help"
(exit 1); exit ;;
esac
# Unless specified, the output is stdout.
test -z "$outfile" && outfile=-
# We need an actual file.
if test z$infile = z-; then
infile=$tmp/stdin
cat >$infile
elif test ! -r "$infile"; then
echo "$me: $infile: No such file or directory" >&2
(exit 1); exit
fi
# Output is produced into FD 4. Prepare it.
case "x$outfile" in
x-) # Output to stdout
exec 4>&1 ;;
* )
exec 4>$outfile;;
esac
# Initializations are performed. Proceed to the main task.
case $task in
## --------------------------------- ##
## Generate the `configure' script. ##
## --------------------------------- ##
script)
# M4 expansion.
$run_m4f -D_AC_WARNINGS=$_ac_warnings $infile >$tmp/configure || exit
# You can add your own prefixes to pattern if you want to check for
# them too.
pattern="_?A[CHM]_|m4_"
if test "x$outfile" != x-; then
chmod +x $outfile
fi
# Put the real line numbers into configure to make config.log more
# helpful. Because quoting can sometimes get really painful in m4,
# there are special @tokens@ to substitute.
cat >$tmp/finalize.awk <<EOF
function undefined (file, line, macro)
{
print file ":" line ": error: undefined macro: " macro | "cat >&2"
}
{
sub(/[ ]*$/, "")
if (\$0 == "")
{
if (!duplicate)
{
oline++
print
}
duplicate = 1
next
}
duplicate = 0
oline++
if (\$0 ~ /__oline__/)
while (sub(/__oline__/, oline))
continue
while (sub (/@<:@/, "["))
continue
while (sub (/@:>@/, "]"))
continue
while (sub (/@S\|@/, "$"))
continue
while (sub (/@%:@/, "#"))
continue
# Dubious feature: we tolerate macro names when commented.
if (/^[^#]*($pattern)/)
{
match (\$0, /($pattern)[_A-Za-z0-9]*/)
macros [substr (\$0, RSTART, RLENGTH)] = oline
some_macros_were_not_expanded = 1
}
print
}
# If there are some macros which are left unexpanded in the output,
# try to find the input which is responsible. Otherwise, try to help.
END {
if (some_macros_were_not_expanded)
{
line = 0
while (getline < "$infile")
{
line++
for (macro in macros)
if (index (\$0, macro))
{
delete macros [macro]
undefined("$infile", line, macro)
}
}
close ("$infile")
for (macro in macros)
undefined("$outfile", macros [macro], macro)
exit 1
}
}
EOF
$AWK -f $tmp/finalize.awk <$tmp/configure >&4 || exit 1
;; # End of the task script.
## -------------- ##
## Trace macros. ##
## -------------- ##
trace)
# trace.m4
# --------
# Routines to process formatted m4 traces.
cat >$tmp/trace.m4 <<\EOF
divert(-1)
changequote([, ])
# _MODE(SEPARATOR, ELT1, ELT2...)
# -------------------------------
# List the elements, separating then with SEPARATOR.
# MODE can be:
# `at' -- the elements are enclosed in brackets.
# `star' -- the elements are listed as are.
# `percent' -- the elements are `smashed': spaces are singled out,
# and no new line remains.
define([_at],
[ifelse([$#], [1], [],
[$#], [2], [[[$2]]],
[[[$2]][$1]$0([$1], shift(shift($@)))])])
define([_percent],
[ifelse([$#], [1], [],
[$#], [2], [smash([$2])],
[smash([$2])[$1]$0([$1], shift(shift($@)))])])
define([_star],
[ifelse([$#], [1], [],
[$#], [2], [[$2]],
[[$2][$1]$0([$1], shift(shift($@)))])])
# Smash quotes its result.
define([smash],
[patsubst(patsubst(patsubst([[[$1]]],
[\\
]),
[[
]+],
[ ]),
[^ *\(.*\) *$], [[\1]])])
define([args], [shift(shift(shift(shift(shift($@)))))])
define([at], [_$0([$1], args($@))])
define([percent], [_$0([$1], args($@))])
define([star], [_$0([$1], args($@))])
EOF
# trace2m4.sed
# ------------
# Transform the traces from m4 into an m4 input file.
# Typically, transform:
# | m4trace:configure.in:3: -1- AC_SUBST([exec_prefix], [NONE])
# into
# | AT_AC_SUBST([configure.in], [3], [1], [AC_SUBST], [exec_prefix], [NONE])
# Pay attention that the file name might include colons, if under DOS
# for instance, so we don't use `[^:][^:]*'.
# The first s/// catches multiline traces, the second, traces as above.
preamble='m4trace:\(..*\):\([0-9][0-9]*\): -\([0-9][0-9]*\)-'
cat >$tmp/trace2m4.sed <<EOF
s/^$preamble \([^(][^(]*\)(\(.*\)$/AT_\4([\1], [\2], [\3], [\4], \5/
s/^$preamble \(.*\)$/AT_\4([\1], [\2], [\3], [\4])/
EOF
# translate.awk
# -------------
# Translate user tracing requests into m4 macros.
cat >$tmp/translate.awk <<\EOF
function trans (arg, sep)
{
# File name.
if (arg == "f")
return "$1"
# Line number.
if (arg == "l")
return "$2"
# Depth.
if (arg == "d")
return "$3"
# Name (also available as $0).
if (arg == "n")
return "$4"
# Escaped dollar.
if (arg == "$")
return "$"
# $@, list of quoted effective arguments.
if (arg == "@")
return "]at([" (separator ? separator : ",") "], $@)["
# $*, list of unquoted effective arguments.
if (arg == "*")
return "]star([" (separator ? separator : ",") "], $@)["
# $%, list of smashed unquoted effective arguments.
if (arg == "%")
return "]percent([" (separator ? separator : ":") "], $@)["
}
function error (message)
{
print message | "cat >&2"
exit 1
}
{
# Accumulate the whole input.
request = request $0 "\n"
}
END {
# Chomp.
request = substr (request, 1, length (request) - 1)
# The default request is `$f:$l:$n:$*'.
colon = index (request, ":")
macro = colon ? substr (request, 1, colon - 1) : request
request = colon ? substr (request, colon + 1) : "$f:$l:$n:$%"
res = ""
for (cp = request; cp; cp = substr (cp, 2))
{
char = substr (cp, 1, 1)
if (char == "$")
{
if (match (cp, /^\$[0-9]+/))
{
# $n -> $(n + 4)
res = res "$" (substr (cp, 2, RLENGTH - 1) + 4)
cp = substr (cp, RLENGTH)
}
else if (substr (cp, 2, 1) ~ /[fldn$@%*]/)
{
# $x, no separator given.
res = res trans(substr (cp, 2, 1))
cp = substr (cp, 2)
}
else if (substr (cp, 2, 1) == "{")
{
# ${sep}x, long separator.
end = index (cp, "}")
if (!end)
error("invalid escape: " cp)
separator = substr (cp, 3, end - 3)
if (substr (cp, end + 1, 1) ~ /[*@%]/)
res = res trans(substr (cp, end + 1, 1), separator)
else
error("invalid escape: " cp)
cp = substr (cp, end + 1)
}
else if (substr (cp, 3, 1) ~ /[*@%]/)
{
# $sx, short separator `s'.
res = res trans(substr (cp, 3, 1), substr (cp, 2, 1))
cp = substr(cp, 3)
}
else
{
error("invalid escape: " substr (cp, 1, 2))
}
}
else
res = res char
}
# Produce the definition of AT_<MACRO> = the translation of the request.
print "define([AT_" macro "], [[" res "]])"
close("cat >&2")
}
EOF
# Extract both the m4 program and the m4 options from TRACES.
eval set dummy "$traces"
shift
for trace
do
# The request may be several lines long, hence sed has to quit.
trace_opt="$trace_opt -t "`echo "$trace" | sed -e 's/:.*//;q'`
echo "$trace" | $AWK -f $tmp/translate.awk >>$tmp/trace.m4 || exit
done
echo "divert(0)dnl" >>$tmp/trace.m4
# Do we trace the initialization?
# `errprint' must be silent, otherwise there can be warnings mixed
# with traces in m4's stderr.
if $initialization; then
run_m4_trace="$run_m4 $trace_opt -daflq -Derrprint"
else
run_m4_trace="$run_m4f $trace_opt -daflq -Derrprint"
fi
# Run m4 on the input file to get traces.
$verbose "$me: running $run_m4_trace $infile | $M4 $tmp/trace.m4" >&2
$run_m4_trace $infile 2>&1 >/dev/null |
sed -f $tmp/trace2m4.sed |
# Now we are ready to run m4 to process the trace file.
$M4 $tmp/trace.m4 - |
# It makes no sense to try to transform __oline__.
sed '
s/@<:@/[/g
s/@:>@/]/g
s/@S|@/$/g
s/@%:@/#/g
' >&4
;;
## ------------ ##
## Unknown task ##
## ------------ ##
*)echo "$me: internal error: unknown task: $task" >&2
(exit 1); exit
esac
(exit $status); exit
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