t/lex-lib-external.sh

   1 #! /bin/sh
   2 # Copyright (C) 2011-2024 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 AM_LFLAGS = --never-interactive
  32
  33 bin_PROGRAMS = lexer
  34 lexer_SOURCES = foo.l
  35 lexer_LDADD = $(LEXLIB)
  36
  37 .PHONY: have-lexlib
  38 have-lexlib:
  39         test x'$(LEXLIB)' != x
  40         echo 'int main (void) { return yywrap (); }' > x.c
  41         $(CC) -c x.c
  42         $(CC) x.$(OBJEXT) $(LEXLIB)
  43         rm -f x.c *.$(OBJEXT) *.o *.out *.exe
  44 END
  45
  46 cat > foo.l <<'END'
  47 %%
  48 "GOOD"   return EOF;
  49 .
  50 %%
  51 int main (void)
  52 {
  53   /* We don't use a 'while' loop here (like a real lexer would do)
  54      to avoid possible hangs. */
  55   if (yylex () == EOF)
  56     return 0;
  57   else
  58     return 1;
  59 }
  60 END
  61
  62 $ACLOCAL
  63 $AUTOCONF
  64 $AUTOMAKE -a
  65
  66 ./configure
  67 $MAKE have-lexlib || skip_ "no system-wide lex library found"
  68
  69 # Program should build and run and distribute.
  70 $MAKE all
  71 if ! cross_compiling; then
  72   echo GOOD | ./lexer
  73   echo BAD | ./lexer && exit 1
  74   : For shells with busted 'set -e'.
  75 fi
  76 yl_distcheck
  77
  78 :