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-rw-r--r--third_party/rust/cc/src/bin/gcc-shim.rs48
1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/rust/cc/src/bin/gcc-shim.rs b/third_party/rust/cc/src/bin/gcc-shim.rs
new file mode 100644
index 0000000000..1731df82ea
--- /dev/null
+++ b/third_party/rust/cc/src/bin/gcc-shim.rs
@@ -0,0 +1,48 @@
+#![cfg_attr(test, allow(dead_code))]
+
+use std::env;
+use std::fs::File;
+use std::io::prelude::*;
+use std::path::PathBuf;
+
+fn main() {
+ let mut args = env::args();
+ let program = args.next().expect("Unexpected empty args");
+
+ let out_dir = PathBuf::from(
+ env::var_os("GCCTEST_OUT_DIR").expect(&format!("{}: GCCTEST_OUT_DIR not found", program)),
+ );
+
+ // Find the first nonexistent candidate file to which the program's args can be written.
+ for i in 0.. {
+ let candidate = &out_dir.join(format!("out{}", i));
+
+ // If the file exists, commands have already run. Try again.
+ if candidate.exists() {
+ continue;
+ }
+
+ // Create a file and record the args passed to the command.
+ let mut f = File::create(candidate).expect(&format!(
+ "{}: can't create candidate: {}",
+ program,
+ candidate.to_string_lossy()
+ ));
+ for arg in args {
+ writeln!(f, "{}", arg).expect(&format!(
+ "{}: can't write to candidate: {}",
+ program,
+ candidate.to_string_lossy()
+ ));
+ }
+ break;
+ }
+
+ // Create a file used by some tests.
+ let path = &out_dir.join("libfoo.a");
+ File::create(path).expect(&format!(
+ "{}: can't create libfoo.a: {}",
+ program,
+ path.to_string_lossy()
+ ));
+}