Works under old crypto API

macOS before 10.7 requires to use OpenSSL because a lot of things is
missed.

Author: catap

vendor/crypto-hash/Cargo.toml

@@ -23,9 +23,9 @@ license = "MIT"
 repository = "https://github.com/malept/crypto-hash"
 [dependencies.hex]
 version = "0.3"
-[target."cfg(not(any(target_os = \"windows\", target_os = \"macos\")))".dependencies.openssl]
+[target."cfg(not(any(target_os = \"windows\", all(target_os = \"macos\", not(feature = \"macos_before_10_7\")))))".dependencies.openssl]
 version = "0.10"
-[target."cfg(target_os = \"macos\")".dependencies.commoncrypto]
+[target."cfg(all(target_os = \"macos\", not(feature = \"macos_before_10_7\")))".dependencies.commoncrypto]
 version = "0.2"
 [target."cfg(target_os = \"windows\")".dependencies.winapi]
 version = "0.3"

vendor/crypto-hash/src/lib.rs

@@ -43,7 +43,7 @@
 
 #![warn(missing_docs)]
 
-#[cfg(target_os = "macos")]
+#[cfg(all(target_os = "macos", not(feature = "macos_before_10_7")))]
 extern crate commoncrypto;
 extern crate hex;
 #[cfg(not(any(target_os = "macos", target_os = "windows")))]
@@ -53,13 +53,13 @@ extern crate winapi;
 
 use std::io::Write;
 
-#[cfg(target_os = "macos")]
+#[cfg(all(target_os = "macos", not(feature = "macos_before_10_7")))]
 #[path = "imp/commoncrypto.rs"]
 mod imp;
 #[cfg(target_os = "windows")]
 #[path = "imp/cryptoapi.rs"]
 mod imp;
-#[cfg(not(any(target_os = "macos", target_os = "windows")))]
+#[cfg(not(any(all(target_os = "macos", not(feature = "macos_before_10_7")), target_os = "windows")))]
 #[path = "imp/openssl.rs"]
 mod imp;
 

vendor/libgit2-sys/build.rs

@@ -132,6 +132,7 @@ fn main() {
 
         if windows {
             features.push_str("#define GIT_WINHTTP 1\n");
+        #[cfg(not(feature = "macos_before_10_7"))]
         } else if target.contains("apple") {
             features.push_str("#define GIT_SECURE_TRANSPORT 1\n");
         } else {