autocfg

autocfg 1.5.1 is a build-script helper that probes the host rustc for compiler feature support by spawning it as a subprocess. No findings. No unsafe code, no external dependencies, no network access.

autocfg 1.5.0 is a dependency-free build-script utility that probes rustc features by invoking the compiler on synthesized snippets. No findings; no unsafe, no binaries, no build script, no network — safe to use as a build dependency.