1 files changed, 82 insertions, 0 deletions
diff --git a/t/yacc-depend.sh b/t/yacc-depend.sh
new file mode 100755
index 000000000..73d64ad12
--- /dev/null
+++ b/t/yacc-depend.sh
@@ -0,0 +1,82 @@
+#! /bin/sh
+# Copyright (C) 2001-2012 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 <http://www.gnu.org/licenses/>.
+
+# Make sure depcomp does not needlessly update headers for yacc rules.
+# Report from Paolo Bonzini.
+
+required=yacc
+. ./defs || Exit 1
+
+cat >> configure.ac << 'END'
+AC_PROG_CC
+AC_PROG_YACC
+AC_OUTPUT
+END
+
+cat > Makefile.am << 'END'
+bin_PROGRAMS = foo
+AM_YFLAGS = -d
+foo_SOURCES = foo.y main.c
+BUILT_SOURCES = foo.h
+END
+
+cat > foo.y << 'END'
+%{
+int yylex () { return 0; }
+void yyerror (char *s) { return; }
+%}
+%token TOKEN
+%%
+foobar : 'f' 'o' 'o' 'b' 'a' 'r' {};
+END
+
+
+cat > main.c << 'END'
+#include "foo.h"
+int main(void)
+{
+  return yyparse ();
+}
+END
+
+$ACLOCAL
+$AUTOCONF
+$AUTOMAKE -a
+
+# Try to enable dependency tracking if possible, even if that means
+# using slow dependency extractors.
+./configure --enable-dependency-tracking
+$MAKE
+ls -l # For debugging.
+
+# Make sure foo.h is not updated if not really needed.
+$sleep
+: > my-timestamp
+$sleep
+touch foo.y
+$MAKE
+stat my-timestamp foo.* || : # For debugging.
+is_newest my-timestamp foo.h
+
+# Make sure foo.h is updated if needed.
+$sleep
+sed 's/TOKEN/TEKON/g' foo.y > t
+mv -f t foo.y
+$MAKE
+stat my-timestamp foo.* || : # For debugging.
+is_newest foo.h my-timestamp
+
+: