Driver/Darwin: Add a runtime library just for ___eprintf -- when targeting i386
some projects still depend on ___eprintf being available.
llvm-svn: 114509
diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index 5b4c93b..79fb075 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -501,11 +501,20 @@
else if (isMacosxVersionLT(10, 6))
CmdArgs.push_back("-lgcc_s.10.5");
- // For OS X, we only need a static runtime library when targetting 10.4, to
- // provide versions of the static functions which were omitted from
- // 10.4.dylib.
- if (isMacosxVersionLT(10, 5))
+ // For OS X, we thought we would only need a static runtime library when
+ // targetting 10.4, to provide versions of the static functions which were
+ // omitted from 10.4.dylib.
+ //
+ // Unfortunately, that turned out to not be true, because Darwin system
+ // headers can still use eprintf on i386, and it is not exported from
+ // libSystem. Therefore, we still must provide a runtime library just for
+ // the tiny tiny handful of projects that *might* use that symbol.
+ if (isMacosxVersionLT(10, 5)) {
DarwinStaticLib = "libclang_rt.10.4.a";
+ } else {
+ if (getTriple().getArch() == llvm::Triple::x86)
+ DarwinStaticLib = "libclang_rt.eprintf.a";
+ }
}
/// Add the target specific static library, if needed.