From: Daniel Dunbar <daniel@zuster.org>
Date: Fri, 17 Sep 2010 04:25:24 +0000 (+0000)
Subject: System: Don't reexport ___eprintf when building with Clang; this symbol isn't
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=7ca6e73e7f192dc16ec9e47d6d1b0079736e37a0;p=oota-llvm.git

System: Don't reexport ___eprintf when building with Clang; this symbol isn't
used on Darwin anymore, and Clang might not always link with the library it is
currently found in.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114165 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/System/SearchForAddressOfSpecialSymbol.cpp b/lib/System/SearchForAddressOfSpecialSymbol.cpp
index 73b484c2e91..2fcc3401c36 100644
--- a/lib/System/SearchForAddressOfSpecialSymbol.cpp
+++ b/lib/System/SearchForAddressOfSpecialSymbol.cpp
@@ -32,7 +32,14 @@ static void *DoSearch(const char* symbolName) {
     EXPLICIT_SYMBOL(__ashrdi3);
     EXPLICIT_SYMBOL(__cmpdi2);
     EXPLICIT_SYMBOL(__divdi3);
+
+    // Clang doesn't always link against libgcc.a, which is the only thing which
+    // defines ___eprintf in the modern world. Just don't attempt to export this
+    // symbol when building with Clang.
+#ifndef __clang__
     EXPLICIT_SYMBOL(__eprintf);
+#endif
+
     EXPLICIT_SYMBOL(__fixdfdi);
     EXPLICIT_SYMBOL(__fixsfdi);
     EXPLICIT_SYMBOL(__fixunsdfdi);