For PR738:
Demote check for bison from error to warning and make sure that the
makefile can handle an empty definition for BISON variable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29861 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/configure b/configure
index 25bbe72..7f35be5 100755
--- a/configure
+++ b/configure
@@ -6365,9 +6365,9 @@
{ echo "$as_me:$LINENO: result: $llvm_cv_has_bison" >&5
echo "${ECHO_T}$llvm_cv_has_bison" >&6; }
if test "$YACC" != "bison -y"; then
- { { echo "$as_me:$LINENO: error: bison not found but required" >&5
-echo "$as_me: error: bison not found but required" >&2;}
- { (exit 1); exit 1; }; }
+
+ { echo "$as_me:$LINENO: WARNING: bison not found, can't rebuild grammars" >&5
+echo "$as_me: WARNING: bison not found, can't rebuild grammars" >&2;}
else
BISON=bison