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#! /bin/sh
# Copyright (C) 2011-2025 Free Software Foundation, Inc.
#
# 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, or (at your option)
# any later version.
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# Check that C++ source files derived from non-distributed Lex sources
# are cleaned by "make clean", while C++ source files derived from
# distributed Lex sources are cleaned by "make maintainer-clean".
# See also sister test 'lex-clean.sh'.
required='c++ lex'
. test-init.sh
cat >> configure.ac << 'END'
AC_PROG_CXX
AC_PROG_LEX
AC_OUTPUT
END
cat > Makefile.am << 'END'
AM_LFLAGS = --never-interactive
bin_PROGRAMS = foo bar baz qux
foo_SOURCES = mainfoo.cc parsefoo.lxx
bar_SOURCES = mainbar.cpp parsebar.ll
bar_LFLAGS = $(AM_LFLAGS)
baz_SOURCES = mainbaz.c++
nodist_baz_SOURCES = parsebaz.l++
qux_SOURCES = mainqux.cxx
nodist_qux_SOURCES = parsequx.lpp
qux_LFLAGS = $(AM_LFLAGS)
parsebaz.l++ parsequx.lpp:
cp $(srcdir)/parsefoo.lxx $@
CLEANFILES = parsebaz.l++ parsequx.lpp
LDADD = $(LEXLIB)
END
# For the explanation of the conditionals on using extern "C",
# see https://debbugs.gnu.org/cgi/bugreport.cgi?bug=45205#13.
cat > parsefoo.lxx << 'END'
%{
#define YY_DECL int yylex (void)
#if (defined __cplusplus) && ((!defined __sun) || (defined __EXTERN_C__))
extern "C"
#endif
YY_DECL;
%}
%%
"GOOD" return EOF;
.
%%
int yywrap (void)
{
return 1;
}
END
cp parsefoo.lxx parsebar.ll
cat > mainfoo.cc << 'END'
// This file should contain valid C++ but invalid C.
#if (defined __cplusplus) && ((!defined __sun) || (defined __EXTERN_C__))
extern "C"
#endif
int yylex (void);
using namespace std;
int main (int argc, char **argv)
{
return yylex ();
}
END
cp mainfoo.cc mainbar.cpp
cp mainfoo.cc mainbaz.c++
cp mainfoo.cc mainqux.cxx
$ACLOCAL
$AUTOCONF
$AUTOMAKE -a
./configure
cp config.status config.sav
$MAKE
ls -l
# Sanity checks.
test -f parsefoo.cxx
test -f bar-parsebar.cc
test -f parsebaz.l++
test -f parsebaz.c++
test -f parsequx.lpp
test -f qux-parsequx.cpp
for target in clean distclean; do
$MAKE $target
ls -l
test -f parsefoo.cxx
test -f bar-parsebar.cc
test ! -e parsebaz.l++
test ! -e parsebaz.c++
test ! -e parsequx.lpp
test ! -e qux-parsequx.cpp
done
cp config.sav config.status
./config.status # re-create Makefile
$MAKE maintainer-clean
ls -l
test -f parsefoo.lxx
test -f parsebar.ll
test ! -e parsefoo.cxx
test ! -e bar-parsebar.cc
test -f parsefoo.lxx
test -f parsebar.ll
test ! -e parsefoo.cxx
test ! -e bar-parsebar.cc
:
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