4d6a05e2ff
the "Wrote xxx" messages was printed, although the compiler appeared to have been run on the .c file that was never claimed to have been written, but got an error because it couldn't find the .h file (also never claimed to have been written), and in one of the successes on the same buildbot, they were both printed for the same file. svn path=/trunk/; revision=41133
170 lines
3.7 KiB
Bash
Executable file
170 lines
3.7 KiB
Bash
Executable file
#! /bin/sh
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#
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# runlex.sh
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# Script to run Lex/Flex.
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# First argument is the (quoted) name of the command; if it's null, that
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# means that neither Flex nor Lex was found, so we report an error and
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# quit.
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#
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# $Id$
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#
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# Wireshark - Network traffic analyzer
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# By Gerald Combs <gerald@wireshark.org>
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# Copyright 2007 Gerald Combs
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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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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#
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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#
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# Get the name of the command to run, and then shift to get the arguments.
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#
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if [ $# -eq 0 ]
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then
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echo "Usage: runlex <lex/flex command to run> [ arguments ]" 1>&2
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exit 1
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fi
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LEX="$1"
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shift
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#
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# Check whether we have it.
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#
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if [ -z "${LEX}" ]
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then
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echo "Neither lex nor flex was found" 1>&2
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exit 1
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fi
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#
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# Process the flags. We don't use getopt because we don't want to
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# embed complete knowledge of what options are supported by Lex/Flex.
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#
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flags=""
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outfile=lex.yy.c
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while [ $# -ne 0 ]
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do
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case "$1" in
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-o*)
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#
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# Set the output file name.
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#
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outfile=`echo "$1" | sed 's/-o\(.*\)/\1/'`
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;;
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-*)
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#
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# Add this to the list of flags.
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#
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flags="$flags $1"
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;;
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--|*)
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#
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# End of flags.
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#
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break
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;;
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esac
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shift
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done
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#
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# OK, run it.
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#
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echo "Running ${LEX}"
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${LEX} -o"$outfile" $flags "$@"
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#
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# Did it succeed?
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#
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if [ $? -ne 0 ]
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then
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#
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# No. Exit with the failing exit status.
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#
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exitstatus=$?
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echo "${LEX} failed: exit status $exitstatus"
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exit $?
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fi
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#
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# Flex has the annoying habit of stripping all but the last component of
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# the "-o" flag argument and using that as the place to put the output.
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# This gets in the way of building in a directory different from the
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# source directory. Try to work around this.
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#
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# Is the outfile where we think it is?
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#
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outfile_base=`basename "$outfile"`
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if [ "$outfile_base" != "$outfile" -a \( ! -r "$outfile" \) -a -r "$outfile_base" ]
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then
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#
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# No, it's not, but it is in the current directory. Put it
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# where it's supposed to be.
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#
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mv "$outfile_base" "$outfile"
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if [ $? -ne 0 ]
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then
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echo $?
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fi
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fi
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echo "Wrote $outfile"
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#
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# OK, now let's generate a header file declaring the relevant functions
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# defined by the .c file; if the .c file is .../foo.c, the header file
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# will be .../foo_lex.h.
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#
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# This works around some other Flex suckage, wherein it doesn't declare
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# the lex routine before defining it, causing compiler warnings.
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# XXX - newer versions of Flex support --header-file=, to generate the
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# appropriate header file. With those versions, we should use that option.
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#
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#
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# Get the name of the prefix; scan the source files for a %option prefix
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# line. We use the last one.
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#
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echo "Getting prefix"
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prefix=`sed -n 's/%option[ ][ ]*prefix="\(.*\)".*/\1/p' "$@" | tail -1`
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if [ ! -z "$prefix" ]
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then
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prefixline="#define yylex ${prefix}lex"
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fi
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#
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# Construct the name of the header file.
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#
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echo "Getting header file name"
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header_file=`dirname "$outfile"`/`basename "$outfile" .c`_lex.h
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#
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# Spew out the declaration.
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#
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echo "Writing $header_file"
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cat <<EOF >$header_file
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/* This is generated by runlex.sh. Do not edit it. */
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$prefixline
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#ifndef YY_DECL
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#define YY_DECL int yylex(void)
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#endif
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YY_DECL;
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EOF
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echo "Wrote $header_file"
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