# This script was snagged from the MESA project, which uses an MIT license.

#
# 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_PROG_YACC()
    if test "$YACC" != "bison -y"; then
        AC_SUBST(BISON,[])
        AC_MSG_WARN([bison not found])
    else
        AC_SUBST(BISON,[bison])
    fi
])