t/yacc-depend.sh

   1 #! /bin/sh
   2 # Copyright (C) 2001-2024 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 # Make sure depcomp does not needlessly update headers for yacc rules.
  18 # Report from Paolo Bonzini.
  19
  20 required='cc yacc'
  21 . test-init.sh
  22
  23 cat >> configure.ac << 'END'
  24 AC_PROG_CC
  25 AC_PROG_YACC
  26 AC_OUTPUT
  27 END
  28
  29 cat > Makefile.am << 'END'
  30 bin_PROGRAMS = foo
  31 AM_YFLAGS = -d
  32 AM_LFLAGS = --never-interactive
  33
  34 foo_SOURCES = foo.y main.c
  35 BUILT_SOURCES = foo.h
  36 END
  37
  38 cat > foo.y << 'END'
  39 %{
  40 int yylex () { return 0; }
  41 void yyerror (const char *s) {}
  42 %}
  43 %token TOKEN
  44 %%
  45 foobar : 'f' 'o' 'o' 'b' 'a' 'r' {};
  46 END
  47
  48
  49 cat > main.c << 'END'
  50 #include "foo.h"
  51 extern int yyparse (void);
  52 int main(void)
  53 {
  54   return yyparse ();
  55 }
  56 END
  57
  58 $ACLOCAL
  59 $AUTOCONF
  60 $AUTOMAKE -a
  61
  62 # Try to enable dependency tracking if possible, even if that means
  63 # using slow dependency extractors.
  64 ./configure --enable-dependency-tracking
  65 $MAKE
  66 ls -l # For debugging.
  67
  68 # Make sure foo.h is not updated if not really needed.
  69 $sleep
  70 : > my-timestamp
  71 $sleep
  72 touch foo.y
  73 $MAKE
  74 stat my-timestamp foo.* || : # For debugging.
  75 is_newest my-timestamp foo.h
  76
  77 # Make sure foo.h is updated if needed.
  78 $sleep
  79 sed 's/TOKEN/TEKON/g' foo.y > t
  80 mv -f t foo.y
  81 $MAKE
  82 stat my-timestamp foo.* || : # For debugging.
  83 is_newest foo.h my-timestamp
  84
  85 :