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-rw-r--r--lib/Driver/ToolChains.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Driver/ToolChains.cpp b/lib/Driver/ToolChains.cpp
index a0fefcdfc1..398e5dddbf 100644
--- a/lib/Driver/ToolChains.cpp
+++ b/lib/Driver/ToolChains.cpp
@@ -38,7 +38,8 @@ Darwin::Darwin(const HostInfo &Host, const llvm::Triple& Triple,
DarwinVersion[2] = _DarwinVersion[2];
llvm::raw_string_ostream(MacosxVersionMin)
- << "10." << DarwinVersion[0] - 4 << '.' << DarwinVersion[1];
+ << "10." << std::max(0, (int)DarwinVersion[0] - 4) << '.'
+ << DarwinVersion[1];
// FIXME: Lift default up.
IPhoneOSVersionMin = "3.0";