Rollup merge of #102634 - andrewpollack:refactor-test-rustcflags, r=Mark-Simulacrum

compiletest: Refactor test rustcflags

Refactoring `host-rustcflags` and `target-rustcflags` from `Option<String>` to `Vec<String>`

Ref: #102438

r? `@Mark-Simulacrum`

4 files changed, 22 insertions, 39 deletions

diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
index ebac73d8aad..7edd3c12041 100644
--- a/src/bootstrap/test.rs
+++ b/src/bootstrap/test.rs
@@ -1418,7 +1418,7 @@ note: if you're sure you want to do this, please open an issue as to why. In the
         }
         let mut flags = if is_rustdoc { Vec::new() } else { vec!["-Crpath".to_string()] };
         flags.push(format!("-Cdebuginfo={}", builder.config.rust_debuginfo_level_tests));
-        flags.push(builder.config.cmd.rustc_args().join(" "));
+        flags.extend(builder.config.cmd.rustc_args().iter().map(|s| s.to_string()));
 
         if let Some(linker) = builder.linker(target) {
             cmd.arg("--linker").arg(linker);
@@ -1427,12 +1427,16 @@ note: if you're sure you want to do this, please open an issue as to why. In the
         let mut hostflags = flags.clone();
         hostflags.push(format!("-Lnative={}", builder.test_helpers_out(compiler.host).display()));
         hostflags.extend(builder.lld_flags(compiler.host));
-        cmd.arg("--host-rustcflags").arg(hostflags.join(" "));
+        for flag in hostflags {
+            cmd.arg("--host-rustcflags").arg(flag);
+        }
 
         let mut targetflags = flags;
         targetflags.push(format!("-Lnative={}", builder.test_helpers_out(target).display()));
         targetflags.extend(builder.lld_flags(target));
-        cmd.arg("--target-rustcflags").arg(targetflags.join(" "));
+        for flag in targetflags {
+            cmd.arg("--target-rustcflags").arg(flag);
+        }
 
         cmd.arg("--python").arg(builder.python());
 
diff --git a/src/tools/compiletest/src/common.rs b/src/tools/compiletest/src/common.rs
index b9ac6c9f364..0260f684838 100644
--- a/src/tools/compiletest/src/common.rs
+++ b/src/tools/compiletest/src/common.rs
@@ -269,10 +269,10 @@ pub struct Config {
     pub runtool: Option<String>,
 
     /// Flags to pass to the compiler when building for the host
-    pub host_rustcflags: Option<String>,
+    pub host_rustcflags: Vec<String>,
 
     /// Flags to pass to the compiler when building for the target
-    pub target_rustcflags: Option<String>,
+    pub target_rustcflags: Vec<String>,
 
     /// Whether tests should be optimized by default. Individual test-suites and test files may
     /// override this setting.
@@ -457,12 +457,12 @@ pub enum Endian {
 }
 
 impl TargetCfg {
-    fn new(rustc_path: &Path, target: &str, target_rustcflags: &Option<String>) -> TargetCfg {
+    fn new(rustc_path: &Path, target: &str, target_rustcflags: &Vec<String>) -> TargetCfg {
         let output = match Command::new(rustc_path)
             .arg("--print=cfg")
             .arg("--target")
             .arg(target)
-            .args(target_rustcflags.into_iter().map(|s| s.split_whitespace()).flatten())
+            .args(target_rustcflags)
             .output()
         {
             Ok(output) => output,
diff --git a/src/tools/compiletest/src/main.rs b/src/tools/compiletest/src/main.rs
index a8cf6623f35..19cf54780c1 100644
--- a/src/tools/compiletest/src/main.rs
+++ b/src/tools/compiletest/src/main.rs
@@ -254,8 +254,8 @@ pub fn parse_config(args: Vec<String>) -> Config {
         }),
         logfile: matches.opt_str("logfile").map(|s| PathBuf::from(&s)),
         runtool: matches.opt_str("runtool"),
-        host_rustcflags: Some(matches.opt_strs("host-rustcflags").join(" ")),
-        target_rustcflags: Some(matches.opt_strs("target-rustcflags").join(" ")),
+        host_rustcflags: matches.opt_strs("host-rustcflags"),
+        target_rustcflags: matches.opt_strs("target-rustcflags"),
         optimize_tests: matches.opt_present("optimize-tests"),
         target,
         host: opt_str2(matches.opt_str("host")),
@@ -322,8 +322,8 @@ pub fn log_config(config: &Config) {
         format!("force_pass_mode: {}", opt_str(&config.force_pass_mode.map(|m| format!("{}", m))),),
     );
     logv(c, format!("runtool: {}", opt_str(&config.runtool)));
-    logv(c, format!("host-rustcflags: {}", opt_str(&config.host_rustcflags)));
-    logv(c, format!("target-rustcflags: {}", opt_str(&config.target_rustcflags)));
+    logv(c, format!("host-rustcflags: {:?}", config.host_rustcflags));
+    logv(c, format!("target-rustcflags: {:?}", config.target_rustcflags));
     logv(c, format!("target: {}", config.target));
     logv(c, format!("host: {}", config.host));
     logv(c, format!("android-cross-path: {:?}", config.android_cross_path.display()));
diff --git a/src/tools/compiletest/src/runtest.rs b/src/tools/compiletest/src/runtest.rs
index 8f289876f73..8af5f1da694 100644
--- a/src/tools/compiletest/src/runtest.rs
+++ b/src/tools/compiletest/src/runtest.rs
@@ -558,10 +558,7 @@ impl<'test> TestCx<'test> {
             .arg(&aux_dir)
             .args(&self.props.compile_flags)
             .envs(self.props.rustc_env.clone());
-        self.maybe_add_external_args(
-            &mut rustc,
-            self.split_maybe_args(&self.config.target_rustcflags),
-        );
+        self.maybe_add_external_args(&mut rustc, &self.config.target_rustcflags);
 
         let src = match read_from {
             ReadFrom::Stdin(src) => Some(src),
@@ -629,10 +626,7 @@ impl<'test> TestCx<'test> {
             .arg("-L")
             .arg(aux_dir);
         self.set_revision_flags(&mut rustc);
-        self.maybe_add_external_args(
-            &mut rustc,
-            self.split_maybe_args(&self.config.target_rustcflags),
-        );
+        self.maybe_add_external_args(&mut rustc, &self.config.target_rustcflags);
         rustc.args(&self.props.compile_flags);
 
         self.compose_and_run_compiler(rustc, Some(src))
@@ -1186,23 +1180,14 @@ impl<'test> TestCx<'test> {
         ProcRes { status, stdout: out, stderr: err, cmdline: format!("{:?}", cmd) }
     }
 
-    fn cleanup_debug_info_options(&self, options: &Option<String>) -> Option<String> {
-        if options.is_none() {
-            return None;
-        }
-
+    fn cleanup_debug_info_options(&self, options: &Vec<String>) -> Vec<String> {
         // Remove options that are either unwanted (-O) or may lead to duplicates due to RUSTFLAGS.
         let options_to_remove = ["-O".to_owned(), "-g".to_owned(), "--debuginfo".to_owned()];
-        let new_options = self
-            .split_maybe_args(options)
-            .into_iter()
-            .filter(|x| !options_to_remove.contains(x))
-            .collect::<Vec<String>>();
 
-        Some(new_options.join(" "))
+        options.iter().filter(|x| !options_to_remove.contains(x)).map(|x| x.clone()).collect()
     }
 
-    fn maybe_add_external_args(&self, cmd: &mut Command, args: Vec<String>) {
+    fn maybe_add_external_args(&self, cmd: &mut Command, args: &Vec<String>) {
         // Filter out the arguments that should not be added by runtest here.
         //
         // Notable use-cases are: do not add our optimisation flag if
@@ -2035,15 +2020,9 @@ impl<'test> TestCx<'test> {
         }
 
         if self.props.force_host {
-            self.maybe_add_external_args(
-                &mut rustc,
-                self.split_maybe_args(&self.config.host_rustcflags),
-            );
+            self.maybe_add_external_args(&mut rustc, &self.config.host_rustcflags);
         } else {
-            self.maybe_add_external_args(
-                &mut rustc,
-                self.split_maybe_args(&self.config.target_rustcflags),
-            );
+            self.maybe_add_external_args(&mut rustc, &self.config.target_rustcflags);
             if !is_rustdoc {
                 if let Some(ref linker) = self.config.linker {
                     rustc.arg(format!("-Clinker={}", linker));