| Dan Gohman | f17a25c | 2007-07-18 16:29:46 +0000 | [diff] [blame] | 1 | # |
| 2 | # Check for Bison. | ||||
| 3 | # | ||||
| 4 | # This macro verifies that Bison is installed. If successful, then | ||||
| 5 | # 1) YACC is set to bison -y (to emulate YACC calls) | ||||
| 6 | # 2) BISON is set to bison | ||||
| 7 | # | ||||
| 8 | AC_DEFUN([AC_PROG_BISON], | ||||
| 9 | [AC_CACHE_CHECK([],[llvm_cv_has_bison],[AC_PROG_YACC()]) | ||||
| 10 | if test "$YACC" != "bison -y"; then | ||||
| 11 | AC_SUBST(BISON,[]) | ||||
| 12 | AC_MSG_WARN([bison not found, can't rebuild grammars]) | ||||
| 13 | else | ||||
| 14 | AC_SUBST(BISON,[bison]) | ||||
| 15 | fi]) | ||||