[llvm-commits] CVS: llvm/autoconf/m4/bison.m4

[Reid Spencer]

Changes in directory llvm/autoconf/m4:

bison.m4 updated: 1.4 -> 1.5
---
Log message:

For PR738: http://llvm.org/PR738 :
Demote check for bison from error to warning and make sure that the 
makefile can handle an empty definition for BISON variable.


---
Diffs of the changes:  (+3 -2)

 bison.m4 |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)


Index: llvm/autoconf/m4/bison.m4
diff -u llvm/autoconf/m4/bison.m4:1.4 llvm/autoconf/m4/bison.m4:1.5
--- llvm/autoconf/m4/bison.m4:1.4	Mon Dec 13 03:37:41 2004
+++ llvm/autoconf/m4/bison.m4	Thu Aug 24 17:41:20 2006
@@ -8,7 +8,8 @@
 AC_DEFUN([AC_PROG_BISON],
 [AC_CACHE_CHECK([],[llvm_cv_has_bison],[AC_PROG_YACC()])
 if test "$YACC" != "bison -y"; then
-  AC_MSG_ERROR([bison not found but required])
+  AC_SUBST(BISON,[])
+  AC_MSG_WARN([bison not found, can't rebuild grammars])
 else
-  AC_SUBST(BISON,[bison],[location of bison])
+  AC_SUBST(BISON,[bison])
 fi])