Create .cargo/config.toml with musl-specific build config

Author: rockbmb

.cargo/config.toml

@@ -0,0 +1,15 @@
+[target.x86_64-unknown-linux-musl]
+linker = "clang"
+rustflags = [
+  "-C", "link-arg=-fuse-ld=lld",
+  "-C", "link-arg=-static-libstdc++",
+  "-C", "target-feature=+crt-static",
+  "-L", "/usr/lib/x86_64-linux-musl",
+]
+
+[env]
+CC_x86_64-unknown-linux-musl = "clang"
+CXX_x86_64-unknown-linux-musl = "clang++"
+AR_x86_64-unknown-linux-musl = "ar"
+CFLAGS_x86_64-unknown-linux-musl = "-fPIC"
+CXXFLAGS_x86_64-unknown-linux-musl = "-fPIC -stdlib=libc++"