3 files changed, 22 insertions, 1 deletions
diff --git a/src/compiletest/header.rs b/src/compiletest/header.rs
index f5505b6e83a..a648e51497e 100644
--- a/src/compiletest/header.rs
+++ b/src/compiletest/header.rs
@@ -170,6 +170,9 @@ pub fn is_test_ignored(config: &Config, testfile: &Path) -> bool {
         format!("ignore-{}",
                 config.stage_id.split('-').next().unwrap())
     }
+    fn ignore_env(config: &Config) -> String {
+        format!("ignore-{}", util::get_env(&config.target).unwrap_or("<unknown>"))
+    }
     fn ignore_gdb(config: &Config, line: &str) -> bool {
         if config.mode != common::DebugInfoGdb {
             return false;
@@ -231,6 +234,7 @@ pub fn is_test_ignored(config: &Config, testfile: &Path) -> bool {
         !parse_name_directive(ln, &ignore_target(config)) &&
         !parse_name_directive(ln, &ignore_architecture(config)) &&
         !parse_name_directive(ln, &ignore_stage(config)) &&
+        !parse_name_directive(ln, &ignore_env(config)) &&
         !(config.mode == common::Pretty && parse_name_directive(ln, "ignore-pretty")) &&
         !(config.target != config.host && parse_name_directive(ln, "ignore-cross-compile")) &&
         !ignore_gdb(config, ln) &&
diff --git a/src/compiletest/runtest.rs b/src/compiletest/runtest.rs
index 3d4aebad9d6..33d4f761eea 100644
--- a/src/compiletest/runtest.rs
+++ b/src/compiletest/runtest.rs
@@ -1233,7 +1233,20 @@ fn compose_and_run_compiler(config: &Config, props: &TestProps,
         let mut crate_type = if aux_props.no_prefer_dynamic {
             Vec::new()
         } else {
-            vec!("--crate-type=dylib".to_string())
+            // We primarily compile all auxiliary libraries as dynamic libraries
+            // to avoid code size bloat and large binaries as much as possible
+            // for the test suite (otherwise including libstd statically in all
+            // executables takes up quite a bit of space).
+            //
+            // For targets like MUSL, however, there is no support for dynamic
+            // libraries so we just go back to building a normal library. Note,
+            // however, that if the library is built with `force_host` then it's
+            // ok to be a dylib as the host should always support dylibs.
+            if config.target.contains("musl") && !aux_props.force_host {
+                vec!("--crate-type=lib".to_string())
+            } else {
+                vec!("--crate-type=dylib".to_string())
+            }
         };
         crate_type.extend(extra_link_args.clone().into_iter());
         let aux_args =
diff --git a/src/compiletest/util.rs b/src/compiletest/util.rs
index a8b26cb3ef7..184d62db451 100644
--- a/src/compiletest/util.rs
+++ b/src/compiletest/util.rs
@@ -60,6 +60,10 @@ pub fn get_arch(triple: &str) -> &'static str {
     panic!("Cannot determine Architecture from triple");
 }
 
+pub fn get_env(triple: &str) -> Option<&str> {
+    triple.split('-').nth(3)
+}
+
 pub fn make_new_path(path: &str) -> String {
     assert!(cfg!(windows));
     // Windows just uses PATH as the library search path, so we have to