rustbuild: Build libstd with ThinLTO

alexcrichton · alexcrichton · commit 832c9430bd6a · 2017-10-31T10:27:48.000-07:00
This commit moves the standard library to get compiled with multiple codegen units and ThinLTO like the compiler itself. This I would hope is the last major step towards closing out #45320
diff --git a/src/bootstrap/builder.rs b/src/bootstrap/builder.rs
@@ -623,8 +623,7 @@ impl<'a> Builder<'a> {
                 cargo.arg("--release");
             }
 
-            if mode != Mode::Libstd && // FIXME(#45320)
-               self.config.rust_codegen_units.is_none() &&
+            if self.config.rust_codegen_units.is_none() &&
                self.build.is_rust_llvm(compiler.host) &&
                !target.contains("mips") // FIXME(#45654)
             {

Original file line number	Diff line number	Diff line change
`@@ -623,8 +623,7 @@ impl<'a> Builder<'a> {`
`623`	`623`	`cargo.arg("--release");`
`624`	`624`	`}`
`625`	`625`
`626`		`- if mode != Mode::Libstd && // FIXME(#45320)`
`627`		`- self.config.rust_codegen_units.is_none() &&`
	`626`	`+ if self.config.rust_codegen_units.is_none() &&`
`628`	`627`	`self.build.is_rust_llvm(compiler.host) &&`
`629`	`628`	`!target.contains("mips") // FIXME(#45654)`
`630`	`629`	`{`