Migrate static-pie scripts to rmake

tests/run-make/static-pie/rmake.rs

@@ -11,10 +11,40 @@ use run_make_support::llvm_readobj;
 use run_make_support::rustc;
 use run_make_support::{cmd, run_with_args, target};
 
+// Minimum major versions supporting -static-pie
+const GCC_VERSION: u32 = 8;
+const CLANG_VERSION: u32 = 9;
+
+// Return `true` if the `compiler` version supports `-static-pie`.
 fn ok_compiler_version(compiler: &str) -> bool {
-    let check_file = format!("check_{compiler}_version.sh");
+    let version_threshold = match compiler {
+        "clang" => CLANG_VERSION,
+        "gcc" => GCC_VERSION,
+        other => panic!("unexpected compiler '{other}', expected 'clang' or 'gcc'"),
+    };
 
-    Command::new(check_file).status().is_ok_and(|status| status.success())
+    if Command::new(compiler).spawn().is_err() {
+        eprintln!("No {compiler} version detected");
+        return false;
+    }
+    // 'major.minor.patch', 'major.minor', or 'major'
+    let version: u32 = cmd(compiler)
+        .arg("-dumpversion")
+        .run()
+        .stdout_utf8()
+        .split(".")
+        .next()
+        .unwrap()
+        .parse()
+        .unwrap();
+
+    if version >= version_threshold {
+        eprintln!("{compiler} supports -static-pie");
+        true
+    } else {
+        eprintln!("{compiler} too old to support -static-pie, skipping test");
+        false
+    }
 }
 
 fn test(compiler: &str) {