2 # Copyright (C) 2011-2013 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 # Automake lex support can work with flex '--header-file' option (see
18 # bugs #8844 and #9933).
23 # Here, we need to use the use flex option '--header-file', but some
24 # older flex versions don't support is (see automake bug#11524 and
25 # bug#12836). Skip this test if such an old flex version is detected.
26 $LEX --help | grep '.*--header-file' \
27 || skip_ "flex doesn't support the --header-file' option"
29 cat >> configure.ac << 'END'
35 cat > Makefile.am << 'END'
37 foo_SOURCES = lexer.l main.c mylex.h
38 foo_LFLAGS = --header-file=mylex.h
39 BUILT_SOURCES = mylex.h
40 # Recover from removal of header.
42 test -f $@ || rm -f foo-lexer.c
43 test -f $@ || $(MAKE) $(AM_MAKEFLAGS) foo-lexer.c
46 cat > lexer.l << 'END'
49 #define YY_NO_UNISTD_H 1
61 /* We don't use a 'while' loop here (like a real lexer would do)
62 to avoid possible hangs. */
76 # Program should build and run.
78 if ! cross_compiling; then
80 echo BAD | ./foo && exit 1
81 : For shells with busted 'set -e'.
84 # Recovering from header removal.
89 # Sanity check on distribution.