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