Edit
thodg/libiconv/autoconf/autoconf
Bruno Haible
- autoconf/autoconf
-
#! /bin/sh # -*- shell-script -*- # autoconf -- create `configure' using m4 macros # Copyright 1992, 1993, 1994, 1996, 1999, 2000, 2001 # 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. me=`echo "$0" | sed -e 's,.*[\\/],,'` usage="\ Usage: $0 [OPTION] ... [TEMPLATE-FILE] Generate a configuration script from a TEMPLATE-FILE if given, or \`configure.ac' if present, or else \`configure.in'. Output is sent to the standard output if TEMPLATE-FILE is given, else into \`configure'. Operation modes: -h, --help print this help, then exit -V, --version print version number, then exit -v, --verbose verbosely report processing -d, --debug don't remove temporary files -o, --output=FILE save output in FILE (stdout is the default) -W, --warnings=CATEGORY report the warnings falling in CATEGORY [syntax] Warning categories include: \`cross' cross compilation issues \`obsolete' obsolete constructs \`syntax' dubious syntactic constructs \`all' all the warnings \`no-CATEGORY' turn off the warnings on CATEGORY \`none' turn off all the warnings \`error' warnings are error The environment variable \`WARNINGS' is honored. Library directories: -A, --autoconf-dir=ACDIR Autoconf's macro files location (rarely needed) -l, --localdir=DIR location of the \`aclocal.m4' file Tracing: -t, --trace=MACRO report the list of calls to MACRO -i, --initialization also trace Autoconf's initialization process In tracing mode, no configuration script is created. Report bugs to <bug-autoconf@gnu.org>." version="\ autoconf (GNU Autoconf) 2.52 Written by David J. MacKenzie. Copyright 1992, 1993, 1994, 1996, 1999, 2000, 2001 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE." help="\ Try \`$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. : ${M4=/usr/bin/m4} case "$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 # Set some high recursion limit as the default limit, 250, has already # been hit with AC_OUTPUT. case " $M4 " in *" --nesting-limit"* | *" -L"* ) # Don't override the user's choice ;; *) M4="$M4 --nesting-limit=1024" ;; esac # Find a good AWK. : ${AWK=gawk} if echo xfoo | $AWK '/foo|^bar$/ { print }' | grep xfoo >/dev/null; then :; else echo "$me: the regex engine of $AWK is too broken to be used" >&2 echo "$me: you might want to install GNU AWK" >&2 exit 1 fi # Variables. : ${autoconf_dir=${AC_MACRODIR=/usr/share/autoconf}} test -z "$AC_ACLOCALDIR" && AC_ACLOCALDIR=`(aclocal --print-ac-dir) 2>/dev/null` 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 "x$1" : 'x--[^=]*=\(.*\)' \| \ "x$1" : 'x-.\(.*\)'` case $1 in --version | -V ) echo "$version" ; exit 0 ;; --help | -h ) echo "$usage"; exit 0 ;; --debug | -d ) debug=:; shift ;; --verbose | -v ) verbose=echo shift;; --localdir=* | -l?* ) localdir=$optarg shift ;; --localdir | -l ) test $# = 1 && eval "$exit_missing_arg" shift localdir=$1 shift ;; --autoconf-dir=* | -A?* ) autoconf_dir=$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" >&2 autoconf_dir=$optarg shift ;; --macrodir | -m ) echo "$me: warning: --macrodir is obsolete, use --autoconf-dir" >&2 test $# = 1 && eval "$exit_missing_arg" shift autoconf_dir=$1 shift ;; --trace=* | -t?* ) task=trace traces="$traces '"`echo "$optarg" | sed "s/'/'\\\\\\\\''/g"`"'" shift ;; --trace | -t ) test $# = 1 && eval "$exit_missing_arg" task=trace shift traces="$traces '"`echo "$1" | sed "s/'/'\\\\\\\\''/g"`"'" shift ;; --initialization | -i ) initialization=: shift;; --output=* | -o?* ) outfile=$optarg shift ;; --output | -o ) test $# = 1 && eval "$exit_missing_arg" shift outfile=$1 shift ;; --warnings=* | -W?* ) warnings=$warnings,$optarg shift ;; --warnings | -W ) test $# = 1 && eval "$exit_missing_arg" shift warnings=$warnings,$1 shift ;; -- ) # Stop option processing shift; break ;; - ) # Use stdin as input. break ;; -* ) exec >&2 echo "$me: invalid option $1" echo "$help" exit 1 ;; * ) break ;; esac done # The warnings are the concatenation of 1. application's defaults, # 2. $WARNINGS, $3 command line options, in that order. # Set them in the order expected by the M4 macros: the converse. alphabet='abcdefghijklmnopqrstuvwxyz' ALPHABET='ABCDEFGHIJKLMNOPQRSTUVWXYZ' NUMBERS='0123456789' WORDCHAR=_$alphabet$ALPHABET$NUMBERS m4_warnings= for warning in `IFS=,; echo syntax $WARNINGS $warnings | tr $ALPHABET $alphabet` do test -n $warning || continue m4_warnings="$warning"`test -n "$m4_warnings" && echo ",$m4_warnings"` done # Trap on 0 to stop playing with `rm'. $debug || { trap 'status=$?; rm -rf $tmp && exit $status' 0 trap '(exit 1); exit 1' 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 $TMPDIR" >&2 (exit 1); exit 1; } # Running m4. test -f "$autoconf_dir/acsite.m4" && acsite_m4="$autoconf_dir/acsite.m4" test -f "$localdir/aclocal.m4" && aclocal_m4="$localdir/aclocal.m4" m4_common="-I $autoconf_dir -I $localdir -Dm4_tmpdir=$tmp" m4_prefiles=" $autoconf_dir/autoconf.m4 $acsite_m4 $aclocal_m4" m4f_prefiles="--reload-state=$autoconf_dir/autoconf.m4f $acsite_m4 $aclocal_m4" run_m4="$M4 $m4_common" # Find the input file. case $# in 0) case `ls configure.ac configure.in 2>/dev/null` in *ac*in ) echo "$me: warning: both \`configure.ac' and \`configure.in' are present." >&2 echo "$me: warning: proceeding with \`configure.ac'." >&2 infile=configure.ac;; *ac ) infile=configure.ac;; *in ) infile=configure.in;; * ) echo "$me: no input file" >&2 exit 1;; esac test $task = script && test -z "$outfile" && outfile=configure;; 1) infile=$1 ;; *) exec >&2 echo "$me: invalid number of arguments." echo "$help" (exit 1); exit 1 ;; esac # Unless specified, the output is stdout. test -z "$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 1 fi # Output is produced into FD 4. Prepare it. case $outfile in -) # Output to stdout exec 4>&1 ;; * ) exec 4>$outfile;; esac # Initializations are performed. Proceed to the main task. case $task in ## --------------------------------- ## ## Generate the `configure' script. ## ## --------------------------------- ## script) # M4 expansion. : >$tmp/forbidden.rx : >$tmp/allowed.rx $verbose "$me: running $run_m4 -Dm4_warnings=$m4_warnings $m4f_prefiles $infile" >&2 $run_m4 -Dm4_warnings=$m4_warnings $m4f_prefiles $infile >$tmp/configure || { (exit 1); exit 1; } if test "x$outfile" != x-; then chmod +x $outfile fi # Put the real line numbers into configure to make config.log more # helpful. Because quoting can sometimes get really painful in m4, # there are special @tokens@ to substitute. sed 's/^ //' >"$tmp/finalize.awk" <<EOF # Load the list of tokens which escape the forbidden patterns. BEGIN { # Be sure the read GAWK documentation to understand the parens # around \`tmp "/forbidden.rx"'. while ((getline pattern < (tmp "/forbidden.rx")) > 0) forbidden = (forbidden ? forbidden "|" : "") pattern close (tmp "/forbidden.rx") if (verbose) errprint("$me: forbidden: " forbidden) while ((getline pattern < (tmp "/allowed.rx")) > 0) allowed = (allowed ? allowed "|" : "") pattern if (!allowed) allowed = "^$" close (tmp "/allowed.rx") if (verbose) errprint("$me: allowed: " allowed) } function errprint (message) { # BAD! the pipe to 'cat >&2' doesn't work for DJGPP. # print message | "cat >&2" # Use normal redirection instead: print message > "$tmp/finalize.err" } function undefined (file, line, macro) { errprint(file ":" line ": error: possibly undefined macro: " macro) } # Body. { sub (/[ \t]*$/, "") if (\$0 == "") { if (!duplicate) { oline++ print } duplicate = 1 next } duplicate = 0 oline++ if (\$0 ~ /__oline__/) while (sub (/__oline__/, oline)) continue while (sub (/@<:@/, "[")) continue while (sub (/@:>@/, "]")) continue while (sub (/@S\|@/, "$")) continue while (sub (/@%:@/, "#")) continue print # Dubious feature: we tolerate macro names when commented. sub (/#.*/, "") # Get the tokens. split (\$0, tokens, /[^$WORDCHAR]*/) for (token in tokens) if (match (tokens[token], forbidden) && !match (tokens[token], allowed)) { macros [tokens [token]] = oline some_macros_were_not_expanded = 1 } } # If there are some macros which are left unexpanded in the output, # try to find the input which is responsible. Otherwise, try to help. END { if (some_macros_were_not_expanded) { line = 0 while (getline < "$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 $AWK -v tmp="$tmp" \ `$verbose "-v verbose=1"` \ -f "$tmp/finalize.awk" <$tmp/configure >&4 || { test -f "$tmp/finalize.err" && cat "$tmp/finalize.err" >&2 (exit 1); exit 1; } test -f "$tmp/finalize.err" && cat "$tmp/finalize.err" >&2 ;; # End of the task script. ## -------------- ## ## Trace macros. ## ## -------------- ## trace) # trace.m4 # -------- # Routines to process formatted m4 traces. sed 's/^ //' >$tmp/trace.m4 <<\EOF divert(-1) changequote([, ]) # _at_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 `flattened': spaces are singled out, # and no new line remains. define([_at_at], [at_ifelse([$#], [1], [], [$#], [2], [[[$2]]], [[[$2]][$1]$0([$1], at_shift(at_shift($@)))])]) define([_at_percent], [at_ifelse([$#], [1], [], [$#], [2], [at_flatten([$2])], [at_flatten([$2])[$1]$0([$1], at_shift(at_shift($@)))])]) define([_at_star], [at_ifelse([$#], [1], [], [$#], [2], [[$2]], [[$2][$1]$0([$1], at_shift(at_shift($@)))])]) # FLATTEN quotes its result. define([at_flatten], [at_patsubst(at_patsubst(at_patsubst([[[$1]]], [\\ ]), [[ ]+], [ ]), [^ *\(.*\) *$], [[\1]])]) define([at_args], [at_shift(at_shift(at_shift(at_shift(at_shift($@)))))]) define([at_at], [_$0([$1], at_args($@))]) define([at_percent], [_$0([$1], at_args($@))]) define([at_star], [_$0([$1], at_args($@))]) EOF # If you trace `define', then on `define([m4_exit], defn([m4exit])' you # will produce # # AT_define([m4sugar.m4], [115], [1], [define], [m4_exit], <m4exit>) # # Since `<m4exit>' is not quoted, the outter m4, when processing # `trace.m4' will exit prematurely. Hence, move all the builtins to # the `at_' name space. echo '# Copy the builtins.' >>$tmp/trace.m4 echo "dumpdef" | $M4 2>&1 >/dev/null | sed 's/^\([^:]*\):.*/define([at_\1], defn([\1]))/' >>$tmp/trace.m4 echo >>$tmp/trace.m4 echo '# Disable the builtins.' >>$tmp/trace.m4 echo "dumpdef" | $M4 2>&1 >/dev/null | sed 's/^\([^:]*\):.*/at_undefine([\1])/' >>$tmp/trace.m4 echo >>$tmp/trace.m4 # trace2m4.sed # ------------ # Transform the traces from m4 into an m4 input file. # Typically, transform: # # | m4trace:configure.ac:3: -1- AC_SUBST([exec_prefix], [NONE]) # # into # # | AT_AC_SUBST([configure.ac], [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_at([" (separator ? separator : ",") "], $@)[" # $*, list of unquoted effective arguments. if (arg == "*") return "]at_star([" (separator ? separator : ",") "], $@)[" # $%, list of flattened unquoted effective arguments. if (arg == "%") return "]at_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) ~ /[*@%]/) { # $sx, short separator `s'. res = res trans(substr (cp, 3, 1), substr (cp, 2, 1)) cp = substr(cp, 3) } else { error("invalid escape: " substr (cp, 1, 2)) } } else res = res char } # Produce the definition of AT_<MACRO> = the translation of the request. print "at_define([AT_" macro "]," print "[[" res "]])" print "" close("cat >&2") } EOF # Extract both the m4 program and the m4 options from TRACES. echo "## ------------------------- ##" >>$tmp/trace.m4 echo "## Trace processing macros. ##" >>$tmp/trace.m4 echo "## ------------------------- ##" >>$tmp/trace.m4 echo >>$tmp/trace.m4 eval set dummy "$traces" shift for trace do echo "# $trace" >>$tmp/trace.m4 # The request may be several lines long, hence sed has to quit. macro_name=`echo "$trace" | sed 's/:.*//;q'` # If for instance TRACE is `define', be sure to have an empty # TRACE_FORMAT. case $trace in $macro_name:* ) trace_format=`echo "$trace" | sed "1s/^$macro_name:/:/"`;; * ) trace_format=;; esac # GNU M4 1.4's tracing of builtins is buggy. When run on this input: # # | divert(-1) # | changequote([, ]) # | define([m4_eval], defn([eval])) # | eval(1) # | m4_eval(2) # | undefine([eval]) # | m4_eval(3) # # it behaves this way: # # | % m4 input.m4 -da -t eval # | m4trace: -1- eval(1) # | m4trace: -1- m4_eval(2) # | m4trace: -1- m4_eval(3) # | % # # Conversely: # # | % m4 input.m4 -da -t m4_eval # | % # # So we will merge them, i.e. tracing `BUILTIN' or tracing # `m4_BUILTIN' will be the same: tracing both, but honoring the # *last* trace specification. # FIXME: This is not enough: in the output `$0' will be `BUILTIN' # sometimes and `m4_BUILTIN' at others. We should render a unique name, # the one specified by the user. base_name=`echo "$macro_name" | sed 's/^m4_//'` if echo "ifdef(\`$base_name', \`', \`m4exit(-1)')" | $M4; then # BASE_NAME is a builtin. trace_opt="$trace_opt -t $base_name -t m4_$base_name" echo "$base_name$trace_format" | $AWK -f $tmp/translate.awk >>$tmp/trace.m4 || { (exit 1); exit 1; } echo "m4_$base_name$trace_format" | $AWK -f $tmp/translate.awk >>$tmp/trace.m4 || { (exit 1); exit 1; } else # MACRO_NAME is not a builtin. trace_opt="$trace_opt -t $macro_name" echo "$trace" | $AWK -f $tmp/translate.awk >>$tmp/trace.m4 || { (exit 1); exit 1; } fi echo >>$tmp/trace.m4 done echo "## ------------------- ##" >>$tmp/trace.m4 echo "## Traces to process. ##" >>$tmp/trace.m4 echo "## ------------------- ##" >>$tmp/trace.m4 echo >>$tmp/trace.m4 echo "at_divert(0)at_dnl" >>$tmp/trace.m4 # Do we trace the initialization? # `errprint' must be silent, otherwise there can be warnings mixed # with traces in m4's stderr. run_m4_trace="$run_m4 $trace_opt -daflq -Derrprint" if $initialization; then trace_prefiles="$m4_prefiles" else trace_prefiles="$m4f_prefiles" fi # Run m4 on the input file to get traces. # # We used to have a simple pipe, which was very convenient as it # allows to use traces on never ending expansions (i.e., when # debugging :) but it is requires to keep error messages *and* # traces in stderr. This is too fragile, as it results in # unexpected data in the output. autoheader has been fragile to # this. $verbose "$me: running $run_m4_trace $trace_prefiles $infile -o $tmp/traces" >&2 $run_m4_trace $trace_prefiles $infile -o $tmp/traces >/dev/null || { echo "$me: tracing failed" >&2 (exit 1); exit 1 } $verbose "$me: running $M4 $tmp/trace.m4" >&2 sed -f $tmp/trace2m4.sed $tmp/traces | # Now we are ready to run m4 to process the trace file. if $debug; then cat >>$tmp/trace.m4 $M4 $tmp/trace.m4 else $M4 $tmp/trace.m4 - fi | # It makes no sense to try to transform __oline__. sed ' s/@<:@/[/g s/@:>@/]/g s/@S|@/$/g s/@%:@/#/g ' >&4 || { echo "$me: traces formatting failed" >&2 (exit 1); exit 1 } ;; ## ------------ ## ## Unknown task ## ## ------------ ## *) echo "$me: internal error: unknown task: $task" >&2 (exit 1); exit 1 esac (exit $status); exit $status