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From ae8900a8833835309aecb0a3d947c2ae46fd86c3 Mon Sep 17 00:00:00 2001
From: Keno Fischer <keno@alumni.harvard.edu>
Date: Thu, 26 Oct 2017 16:44:13 +0000
Subject: [PATCH] [DynamicLibrary] Fix build on musl libc

Summary:
On musl libc, stdin/out/err are defined as `FILE* const` globals,
and their address is not implicitly convertible to void *,
or at least gcc 6 doesn't allow it, giving errors like:

```
error: cannot initialize return object of type 'void *' with an rvalue of type 'FILE *const *' (aka '_IO_FILE *const *')
    EXPLICIT_SYMBOL(stderr);
    ^~~~~~~~~~~~~~~~~~~~~~~
```

Add an explicit cast to fix that problem.

Reviewers: marsupial, krytarowski, dim
Reviewed By: dim
Differential Revision: https://reviews.llvm.org/D39297

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@316672 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/Unix/DynamicLibrary.inc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Support/Unix/DynamicLibrary.inc b/lib/Support/Unix/DynamicLibrary.inc
index f05103ccd1e..029451f347e 100644
--- a/lib/Support/Unix/DynamicLibrary.inc
+++ b/lib/Support/Unix/DynamicLibrary.inc
@@ -71,7 +71,7 @@ void *DynamicLibrary::HandleSet::DLSym(void *Handle, const char *Symbol) {
 // Must declare the symbols in the global namespace.
 static void *DoSearch(const char* SymbolName) {
 #define EXPLICIT_SYMBOL(SYM) \
-   extern void *SYM; if (!strcmp(SymbolName, #SYM)) return &SYM
+   extern void *SYM; if (!strcmp(SymbolName, #SYM)) return (void*)&SYM
 
   // If this is darwin, it has some funky issues, try to solve them here.  Some
   // important symbols are marked 'private external' which doesn't allow