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# Libreswan library for parsing configuration files
#
# Copyright (C) 2005 Michael Richardson <mcr@xelerance.com> Xelerance Corporation
# Copyright (C) 2012 Paul Wouters <paul@libreswan.org>
# Copyright (C) 2015 Andrew Cagney <cagney@gnu.org>
#
# 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 of the License, or (at your
# option) any later version. See <https://www.gnu.org/licenses/gpl2.txt>.
#
# 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.
LIBRARY=ipsecconf
LIB=lib${LIBRARY}.a
SRCS=confread.c confwrite.c starterwhack.c
SRCS+=parser.tab.c lex.yy.c keywords.c
SRCS+=interfaces.c
OBJS=${SRCS:.c=.o}
ifdef top_srcdir
include ${top_srcdir}/mk/library.mk
else
include ../../mk/library.mk
endif
# Hack to force the generated files to be built first. Not too bad
# since all the $(OBJS) indirectly depend on the header anyway.
$(OBJS): $(builddir)/parser.tab.h
# Avoid flex bugs:
#
# - flex 3.5.4 (centos 5) doesn't allow a space between the '-o'
# option and the file name.
#
# Fortunately later versions of flex seem to handle this.
#
# - flex < 2.5.35 generates an invalid extern
#
# Use sed to strip this out.
#
# - flex on RHEL 7 generates code that provokes GCC to warn
# about comparing a signed value with an unsigned value
# (Combination of a new GCC and an old flex).
#
# Adding one cast makes RHEL 6's GCC unhappy, so we add two.
# On RHEL 6, i is int and _yybytes_len is int.
# On RHEL 7, i is int and _yybytes_len is yy_size_t
# On Fedora 21, i is yy_size_t and _yybytes_len is yy_size_t
# On some architectures, yy_size_t is wider than int;
# which makes a mixed comparison OK.
#
# - flex 2.6.0-11 and gcc 4:5.3.1-3 on debian testing (2016-06-18)
# also warns about comparisons of different kinds, so we add a third
# fix.
#
# - avoid sed -i which somehow causes unwritable files on fedora 20
# with 9p filesystem mount.
LEX = flex
$(builddir)/lex.yy.c: parser.lex
: no space between -o and scratch output file
$(LEX) -o$@ --stdout $< | sed \
-e 's/for ( i = 0; i < _yybytes_len; ++i )$$/for ( i = 0; (yy_size_t)i < (yy_size_t)_yybytes_len; ++i )/' \
-e '/^extern int isatty.*$$/d' \
-e 's/if ((int) ((yy_n_chars) + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {$$/if (((yy_n_chars) + number_to_move) > YY_CURRENT_BUFFER_LVALUE->yy_buf_size) {/' \
> $@.tmp
: install result
mv $@.tmp $@
# Use wild card rule so that GNU Make knows that both are output from
# a single recipe.
# - sed command for workaround for older bison vs GCC warning
# - avoid sed -i which somehow causes unwritable files
# on fedora 20 with 9p filesystem mount
# - avoid creating the target file until it is done
# - $* matches %
#
# - run bison from the builddir so that parser.tab.h defines
# YY_YY_PARSER_TAB_H_INCLUDED and not a macro containing the
# buildpath. See parser-controls.h for why.
ifeq ($(USE_YACC),true)
BISON=yacc -b parser
else
BISON=bison
BISONOSFLAGS=-g --verbose
endif
$(builddir)/%.tab.h $(builddir)/%.tab.c: %.y
cd $(builddir) && $(BISON) ${BISONOSFLAGS} -v --defines=$*.tab.h -o $*.tab.c.tmp $(abs_srcdir)/$*.y
sed -e '/^ *#/s/if YYENABLE_NLS/if defined(YYENABLE_NLS) \&\& YYENABLE_NLS/' \
-e '/^ *#/s/if YYLTYPE_IS_TRIVIAL/if defined(YYLTYPE_IS_TRIVIAL) \&\& YYLTYPE_IS_TRIVIAL/' \
< $(builddir)/$*.tab.c.tmp > $(builddir)/$*.tab.c.sedtmp
rm $(builddir)/$*.tab.c.tmp
mv $(builddir)/$*.tab.c.sedtmp $(builddir)/$*.tab.c
clean: parser-clean
.PHONY: parser-clean
parser-clean:
cd $(builddir) && rm -f *.tab.[cdho] *.dot *.output lex.yy.[cdho] *tmp
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