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 73b484c..2fcc340 100644
--- a/lib/System/SearchForAddressOfSpecialSymbol.cpp
+++ b/lib/System/SearchForAddressOfSpecialSymbol.cpp
@@ -32,7 +32,14 @@
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);