Crate libperl_config 

libperl-config

Build-time helper for crates that link against libperl. Reads the local Perl installation’s Config.pm (via perl -V:...) and turns the answers into cargo: directives + cfg(...) flags.

Used by libperl-sys and libperl-rs build scripts to:

• emit cargo:rustc-link-search / rustc-link-lib / rustc-link-arg from $Config{ccopts} and $Config{ldopts},
• expose feature toggles like cfg(perl_useithreads) based on $Config{useithreads},
• emit per-API-version cfgs (cfg(perlapi_ver26) … cfg(perlapi_ver42)) so source can branch on Perl version.

Typical usage in a downstream build.rs:

use libperl_config::PerlConfig;

fn main() {
    let config = PerlConfig::default();
    config.emit_cargo_ldopts();
    config.emit_features(&["useithreads"]);
    config.emit_all_perlapi_versions(10);
}

Selecting which perl to build against

By default the perl found on PATH is used. Set the PERL environment variable to an absolute path to pick a specific interpreter — e.g. an ExtUtils::MakeMaker postamble runs PERL=$(FULLPERL) cargo build ... so the perl that ran Makefile.PL and the perl being linked against are the same. Build scripts are automatically re-run when PERL changes.

See PerlConfig for the full API.

Modules

process_util

Structs

PerlCommand

PerlConfig