2 # Copyright (C) 1999-2013 Free Software Foundation, Inc.
4 # This program is free software; you can redistribute it and/or modify
5 # it under the terms of the GNU General Public License as published by
6 # the Free Software Foundation; either version 2, or (at your option)
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 # GNU General Public License for more details.
14 # You should have received a copy of the GNU General Public License
15 # along with this program. If not, see <http://www.gnu.org/licenses/>.
17 # Check that we can provide a personal 'yywrap' function through the
23 cat >> configure.ac << 'END'
29 AC_REPLACE_FUNCS([yywrap])
34 cat > Makefile.am << 'END'
37 foo_LDADD = $(LEXLIB) $(LIBOBJS)
40 cat > yywrap.c << 'END'
49 #define YY_NO_UNISTD_H 1
66 grep LIBOBJS Makefile # For debugging.
70 # Force "no system lex library". Setting LEXLIB to a non-empty value
71 # ensures that configure won't search for a "lex library", and simply
72 # rely on the LEXLIB to provide it, if needed. So, by setting LEXLIB
73 # to a blank but non-empty value we can fool configure into thinking
74 # that no system-level library providing a 'yywrap' function is
75 # available. See also discussion on automake bug#11306.
76 ./configure LEXLIB=' '
77 grep LIBOBJS Makefile # For debugging.
78 grep '^LIBOBJS *=.*yywrap.*\.o' Makefile # Sanity check.