Define VISIBILITY_HIDDEN when compiling compiler-rt

Robin Kruppe · Robin Kruppe · commit 02249e813ebb · 2016-11-28T12:23:57.000+01:00
This is cherry-picked from #37817 which seems to be stalled and currently needs to be rebased anyway. r? @alexcrichton (who authored this change)
diff --git a/src/libcompiler_builtins/build.rs b/src/libcompiler_builtins/build.rs
@@ -94,6 +94,7 @@ fn main() {
         cfg.flag("-fvisibility=hidden");
         cfg.flag("-fomit-frame-pointer");
         cfg.flag("-ffreestanding");
+        cfg.define("VISIBILITY_HIDDEN", None);
     }
 
     let mut sources = Sources::new();

Original file line number	Diff line number	Diff line change
`@@ -94,6 +94,7 @@ fn main() {`
`94`	`94`	`cfg.flag("-fvisibility=hidden");`
`95`	`95`	`cfg.flag("-fomit-frame-pointer");`
`96`	`96`	`cfg.flag("-ffreestanding");`
	`97`	`+ cfg.define("VISIBILITY_HIDDEN", None);`
`97`	`98`	`}`
`98`	`99`
`99`	`100`	`let mut sources = Sources::new();`