Using #[cfg(target_os = ...] doesn't work in build scripts

[stormshield-kg]

Cross-compiling pq-src from a Linux host to a Windows target doesn't work because of these lines :

pq-sys/pq-src/build.rs

Lines 181 to 182 in 5454b4f

	#[cfg(not(target_os = "windows"))]
	let openssl = std::env::var("DEP_OPENSSL_INCLUDE").unwrap();

The target os is the host target in build.rs when cross-compiling, see cargo issue : rust-lang/cargo#4932 (comment).

[weiznich]

Thanks for opening this bug report. You are right that will not work for cross compiling. Also the file list is likely broken:

pq-sys/pq-src/build.rs

Line 4 in 722f606

#[cfg(any(target_os = "linux", target_os = "windows"))]

(see also the other #[cfg] a bit below).

Would you mind submitting a PR fixing these locations to use the the target provided by the environment variables set by cargo instead?

[stormshield-kg]

Yes, see #54.