mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-18 12:29:21 +00:00
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
16 lines
407 B
Plaintext
16 lines
407 B
Plaintext
#
|
|
# Check for Bison.
|
|
#
|
|
# This macro verifies that Bison is installed. If successful, then
|
|
# 1) YACC is set to bison -y (to emulate YACC calls)
|
|
# 2) BISON is set to bison
|
|
#
|
|
AC_DEFUN([AC_PROG_BISON],
|
|
[AC_CACHE_CHECK([],[llvm_cv_has_bison],[AC_PROG_YACC()])
|
|
if test "$YACC" != "bison -y"; then
|
|
AC_SUBST(BISON,[])
|
|
AC_MSG_WARN([bison not found, can't rebuild grammars])
|
|
else
|
|
AC_SUBST(BISON,[bison])
|
|
fi])
|