diff --git a/Makefile.rules b/Makefile.rules index 42c367a9499..808e2b5a761 100644 --- a/Makefile.rules +++ b/Makefile.rules @@ -1315,10 +1315,14 @@ all:: $(YaccFiles:%.y=$(PROJ_SRC_DIR)/%.cpp.cvs) # Rule for building the bison based parsers... $(PROJ_SRC_DIR)/%.cpp $(PROJ_SRC_DIR)/%.h : $(PROJ_SRC_DIR)/%.y +ifneq ($(BISON),) $(Echo) "Bisoning $*.y" $(Verb) $(BISON) -v -d -p $(&5 echo "${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