Function enable_pam_impl_cfg

pub fn enable_pam_impl_cfg()

Generates cargo directives for build scripts to enable cfg(pam_impl).

Print this in your build.rs script to be able to use the custom pam_impl configuration directive.

// Your package's build.rs:

fn main() {
    // Also available at libpam_sys::pam_impl::enable_pam_impl_cfg().
    libpam_sys_impls::enable_pam_impl_cfg();
    // whatever else you do in your build script.
}

This will set the current pam_impl as well as registering all known PAM implementations with rustc-check-cfg to get cfg-checking.

The names that appear in the cfg variables are the same as the values in the PamImpl enum.

#[cfg(pam_impl = "OpenPam")]
fn openpam_specific_func(handle: *const libpam_sys::pam_handle) {
    let environ = libpam_sys::pam_getenvlist(handle);
    // ...
    libpam_sys::openpam_free_envlist()
}

// This will give you a warning since "UnknownImpl" is not a known
// PAM implementation.
#[cfg(not(pam_impl = "UnknownImpl"))]
fn do_something() {
    // ...
}