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

#
# Check for FLEX.
#
# This macro verifies that flex is installed. If successful, then
# 1) LEX is set to flex (to emulate lex calls)
# 2) FLEX is set to flex
#
AC_DEFUN([AC_PROG_FLEX], [
    AC_PROG_LEX(noyywrap)
    if test "$LEX" != "flex"; then
        AC_SUBST(FLEX,[])
        AC_MSG_ERROR([flex not found])
    else
        AC_SUBST(FLEX,[flex])
    fi
])