can't boostrap if used for CXX/CC caching

[matthiaskrgr]

I use sccache to cache CC and CXX invocations as well.

CC="sccache clang"
CXX="sccache clang++"

however with this, sccache fails to build itself!

The problem is that sccache requires rust-crypto 0.2.36, a package that has not been updated for 2.5 years and still uses the deprecated gcc crate (instead of cc)

Patching rustc-crypto to use cc is only a matter of a couple of lines

diff --git a/Cargo.toml b/Cargo.toml
index 8ea941a..ca3c58d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ name = "crypto"
 with-bench = []

 [build-dependencies]
-gcc = "^0.3"
+cc = "*"

 [dependencies]
 libc = "^0.2"
diff --git a/build.rs b/build.rs
index 92dd2b6..85b5da0 100644
--- a/build.rs
+++ b/build.rs
@@ -4,7 +4,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.

-extern crate gcc;
+extern crate cc;

 use std::env;
 use std::path::Path;
@@ -13,7 +13,7 @@ fn main() {
     let target = env::var("TARGET").unwrap();
     let host = env::var("HOST").unwrap();
     if target.contains("msvc") && host.contains("windows") {
-        let mut config = gcc::Config::new();
+        let mut config = cc::Build::new();
         config.file("src/util_helpers.asm");
         config.file("src/aesni_helpers.asm");
         if target.contains("x86_64") {
@@ -22,7 +22,7 @@ fn main() {
         config.compile("lib_rust_crypto_helpers.a");
     }
     else {
-        let mut cfg = gcc::Config::new();
+        let mut cfg = cc::Build::new();
         cfg.file("src/util_helpers.c");
         cfg.file("src/aesni_helpers.c");
         if env::var_os("CC").is_none() {

however I'm not sure if this can be archived from sccaches Cargo.toml

[TriplEight]

I'd suggest moving to something which is actually better and being supported: https://github.com/RustCrypto

[mati865]

cc https://github.com/mozilla/sccache/issues/330

[luser]

310 has a patch to switch everything to RustCrypto. Someone would need to make the decision and then review and land that patch. (I'm no longer actively maintaining sccache.)