Cross Reference: /src/external/bsd/pam-u2f/dist/m4

`Name`	`Date`	`Size`
Up to higher level directory
`ax_check_compile_flag.m4`	15-Jan-2025	`2.1K`
`lib-ld.m4`	03-Mar-2020	`3.4K`
`lib-link.m4`	03-Mar-2020	`31.3K`
`lib-prefix.m4`	03-Mar-2020	`8.1K`