t/lex-libobj.sh

   1 #! /bin/sh
   2 # Copyright (C) 1999-2012 Free Software Foundation, Inc.
   3 #
   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)
   7 # any later version.
   8 #
   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.
  13 #
  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/>.
  16
  17 # Check that we can provide a personal 'yywrap' function through the
  18 # LIBOBJ machinery.
  19
  20 required='cc lex'
  21 . ./defs || exit 1
  22
  23 cat >> configure.ac << 'END'
  24 AC_PROG_CC
  25 AC_PROG_RANLIB
  26 AC_PROG_LEX
  27 save_LIBS=$LIBS
  28 LIBS="$LEXLIB $LIBS"
  29 AC_REPLACE_FUNCS([yywrap])
  30 LIBS=$save_LIBS
  31 AC_OUTPUT
  32 END
  33
  34 cat > Makefile.am << 'END'
  35 noinst_PROGRAMS = foo
  36 foo_SOURCES = foo.l
  37 foo_LDADD = $(LEXLIB) $(LIBOBJS)
  38 END
  39
  40 cat > yywrap.c << 'END'
  41 int yywrap (void)
  42 {
  43   return 1;
  44 }
  45 END
  46
  47 cat > foo.l <<'END'
  48 %{
  49 #define YY_NO_UNISTD_H 1
  50 %}
  51 %%
  52 "END" return EOF;
  53 .
  54 %%
  55 int main (void)
  56 {
  57   return 0;
  58 }
  59 END
  60
  61 $ACLOCAL
  62 $AUTOCONF
  63 $AUTOMAKE -a
  64
  65 ./configure
  66 grep LIBOBJS Makefile # For debugging.
  67 $MAKE
  68 $MAKE distclean
  69
  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.
  79 $MAKE
  80
  81 yl_distcheck
  82
  83 :