Add test for unstable values of -Clink-self-contained

Author: Kobzol

tests/run-make/rust-lld/rmake.rs

@@ -1,5 +1,5 @@
-// Test linking using `cc` with `rust-lld`, using the unstable CLI described in MCP 510
-// see https://github.com/rust-lang/compiler-team/issues/510 for more info
+// Test linking using `cc` with `rust-lld`, using the `-Clinker-features` and
+// `-Clink-self-contained` CLI flags.
 
 //@ needs-rust-lld
 //@ ignore-s390x lld does not yet support s390x as target
@@ -14,7 +14,7 @@ fn main() {
         rustc().arg("-Clinker-features=+lld").arg("-Clink-self-contained=+linker").input("main.rs"),
     );
 
-    // It should not be used when we explicitly opt-out of lld.
+    // It should not be used when we explicitly opt out of lld.
     assert_rustc_doesnt_use_lld(rustc().arg("-Clinker-features=-lld").input("main.rs"));
 
     // While we're here, also check that the last linker feature flag "wins" when passed multiple

tests/ui/linking/link-self-contained-unstable.crto.stderr

@@ -0,0 +1,2 @@
+error: only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values
+

tests/ui/linking/link-self-contained-unstable.libc.stderr

@@ -0,0 +1,2 @@
+error: only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values
+

tests/ui/linking/link-self-contained-unstable.mingw.stderr

@@ -0,0 +1,2 @@
+error: only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values
+

tests/ui/linking/link-self-contained-unstable.rs

@@ -0,0 +1,18 @@
+// Checks that values for `-Clink-self-contained` other than the blanket enable/disable and
+// `+/-linker` require `-Zunstable-options`.
+
+//@ check-fail
+//@ revisions: crto libc unwind sanitizers mingw
+//@ [crto] compile-flags: -Clink-self-contained=+crto
+//@ [libc] compile-flags: -Clink-self-contained=-libc
+//@ [unwind] compile-flags: -Clink-self-contained=+unwind
+//@ [sanitizers] compile-flags: -Clink-self-contained=-sanitizers
+//@ [mingw] compile-flags: -Clink-self-contained=+mingw
+
+fn main() {}
+
+//[crto]~? ERROR only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values
+//[libc]~? ERROR only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values
+//[unwind]~? ERROR only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values
+//[sanitizers]~? ERROR only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values
+//[mingw]~? ERROR only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values

tests/ui/linking/link-self-contained-unstable.sanitizers.stderr

@@ -0,0 +1,2 @@
+error: only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values
+

tests/ui/linking/link-self-contained-unstable.unwind.stderr

@@ -0,0 +1,2 @@
+error: only `-C link-self-contained` values `y`/`yes`/`on`/`n`/`no`/`off`/`-linker`/`+linker` are stable, the `-Z unstable-options` flag must also be passed to use the unstable values
+

tests/ui/linking/linker-features-lld-disallowed-target.rs

@@ -6,3 +6,5 @@
 
 #![feature(no_core)]
 #![no_core]
+
+//~? ERROR `-C linker-features` with lld are unstable for the `x86_64-unknown-linux-musl` target, the `-Z unstable-options` flag must also be passed to use it on this target

tests/ui/linking/linker-features-lld-disallowed-target.stderr

@@ -1,2 +1,2 @@
-error: `-C linker-features` with lld are unstable for the `x86_64-unknown-linux-musl target, ` the `-Z unstable-options` flag must also be passed to use it on this target
+error: `-C linker-features` with lld are unstable for the `x86_64-unknown-linux-musl` target, the `-Z unstable-options` flag must also be passed to use it on this target
 

tests/ui/linking/linker-features-unstable-cc.rs

@@ -6,3 +6,5 @@
 
 #![feature(no_core)]
 #![no_core]
+
+//~? ERROR incorrect value `+cc` for codegen option `linker-features` - a list of enabled (`+` prefix) and disabled (`-` prefix) features: `lld` was expected