2 # Extract the initialization actions from source files.
4 # Copyright (C) 1996, 97, 98, 99, 2000, 2001, 2002, 2004, 2006, 2008 Free Software Foundation, Inc.
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2, or (at your option)
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this software; see the file COPYING. If not, write to
18 # the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 # Boston, MA 02110-1301 USA
23 # Usage: guile-snarf [-o OUTFILE] [CPP-ARGS ...]
25 # Initialization actions are extracted to OUTFILE or to standard
26 # output when no OUTFILE has been specified or when OUTFILE is "-".
27 # The C preprocessor is called with CPP-ARGS (which usually include a
28 # input file) and the output is filtered for the actions.
30 # If there are errors during processing, OUTFILE is deleted and the
31 # program exits with non-zero status.
33 # During snarfing, the pre-processor macro SCM_MAGIC_SNARFER is
34 # defined. You can use this to avoid including snarfer output files
35 # that don't yet exist by writing code like this:
37 # #ifndef SCM_MAGIC_SNARFER
41 # If the environment variable CPP is set, use its value instead of the
42 # C pre-processor determined at Guile configure-time: "@CPP@".
48 modern_snarf () # writes stdout
50 ## Apparently, AIX's preprocessor is unhappy if you try to #include an
52 echo "/* cpp arguments: $@ */" ;
53 ${cpp} -DSCM_MAGIC_SNARF_INITS -DSCM_MAGIC_SNARFER "$@" > ${temp} && cpp_ok_p=true
54 grep "^ *\^ *\^" ${temp} | sed -e "s/^ *\^ *\^//" -e "s/\^\ *:\ *\^.*/;/"
59 # process command line
60 if [ x"$1" = x--help ] ; then
61 @AWK@ '/^#.Commentary:/,/^#.Code:/' $0 | grep -v Code: \
62 | sed -e 1,2d -e 's/^. *//g'
66 then outfile="$2" ; shift ; shift ;
70 # set vars and handler -- handle CPP override
73 if [ x"$TMPDIR" = x ]; then TMPDIR="/tmp" ; else : ; fi
74 tempdir="$TMPDIR/guile-snarf.$$"
75 (umask 077 && mkdir $tempdir) || exit 1
78 if [ x"$CPP" = x ] ; then cpp="@CPP@" ; else cpp="$CPP" ; fi
80 trap "rm -rf $tempdir" 0 1 2 15
82 if [ ! "$outfile" = "-" ] ; then
83 modern_snarf "$@" > $outfile
88 # zonk outfile if errors occurred
92 [ ! "$outfile" = "-" ] && rm -f $outfile
96 # guile-snarf ends here