add support for needs-dynamic-linking

Author: pietroalbini

src/tools/compiletest/src/header/needs.rs

@@ -130,6 +130,11 @@ pub(super) fn handle_needs(
             condition: config.git_hash,
             ignore_reason: "ignored when git hashes have been omitted for building",
         },
+        Need {
+            name: "needs-dynamic-linking",
+            condition: config.target_cfg().dynamic_linking,
+            ignore_reason: "ignored on targets without dynamic linking",
+        },
     ];
 
     let (name, comment) = match ln.split_once([':', ' ']) {

tests/ui/issues/issue-12133-3.rs

@@ -4,7 +4,7 @@
 // aux-build:issue-12133-dylib2.rs
 // ignore-emscripten no dylib support
 // ignore-musl
-// ignore-sgx no dylib support
+// needs-dynamic-linking
 
 // pretty-expanded FIXME #23616
 

tests/ui/issues/issue-85461.rs

@@ -1,6 +1,7 @@
 // compile-flags: -Cinstrument-coverage -Ccodegen-units=4 --crate-type dylib -Copt-level=0
 // build-pass
 // needs-profiler-support
+// needs-dynamic-linking
 
 // Regression test for #85461 where MSVC sometimes fails to link instrument-coverage binaries
 // with dead code and #[inline(always)].

tests/ui/proc-macro/crt-static.rs

@@ -7,6 +7,7 @@
 // build-pass
 // force-host
 // no-prefer-dynamic
+// needs-dynamic-linking
 
 #![crate_type = "proc-macro"]