t/lex-lib-external.sh

   1 #! /bin/sh
   2 # Copyright (C) 2011-2018 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 <https://www.gnu.org/licenses/>.
  16
  17 # Check that we can get use the 'yywrap' function from a system-wide
  18 # library, if that's available.
  19
  20 required='cc lex'
  21 . test-init.sh
  22
  23 cat >> configure.ac << 'END'
  24 AC_PROG_CC
  25 AC_PROG_RANLIB
  26 AC_PROG_LEX
  27 AC_OUTPUT
  28 END
  29
  30 cat > Makefile.am << 'END'
  31 bin_PROGRAMS = lexer
  32 lexer_SOURCES = foo.l
  33 lexer_LDADD = $(LEXLIB)
  34
  35 .PHONY: have-lexlib
  36 have-lexlib:
  37         test x'$(LEXLIB)' != x
  38         echo 'int main (void) { return yywrap (); }' > x.c
  39         $(CC) -c x.c
  40         $(CC) x.$(OBJEXT) $(LEXLIB)
  41         rm -f x.c *.$(OBJEXT) *.o *.out *.exe
  42 END
  43
  44 cat > foo.l <<'END'
  45 %{
  46 #define YY_NO_UNISTD_H 1
  47 %}
  48 %%
  49 "GOOD"   return EOF;
  50 .
  51 %%
  52 int main (void)
  53 {
  54   /* We don't use a 'while' loop here (like a real lexer would do)
  55      to avoid possible hangs. */
  56   if (yylex () == EOF)
  57     return 0;
  58   else
  59     return 1;
  60 }
  61 END
  62
  63 $ACLOCAL
  64 $AUTOCONF
  65 $AUTOMAKE -a
  66
  67 ./configure
  68 $MAKE have-lexlib || skip_ "no system-wide lex library found"
  69
  70 # Program should build and run and distribute.
  71 $MAKE all
  72 if ! cross_compiling; then
  73   echo GOOD | ./lexer
  74   echo BAD | ./lexer && exit 1
  75   : For shells with busted 'set -e'.
  76 fi
  77 yl_distcheck
  78
  79 :