Force the MachO generated for Darwin to have VERSION_MIN load command

On Darwin, it is required to stamp the object file with VERSION_MIN load
command. This commit will provide a VERSRION_MIN load command to the
MachO file that doesn't specify the version itself by inferring from
Target Triple.

llvm-svn: 244059

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/lib/MC/MCMachOStreamer.cpp b/llvm/lib/MC/MCMachOStreamer.cpp
index 53cd1317a3d..116ef094d18 100644
--- a/llvm/lib/MC/MCMachOStreamer.cpp
+++ b/llvm/lib/MC/MCMachOStreamer.cpp
@@ -493,6 +493,16 @@ MCStreamer *llvm::createMachOStreamer(MCContext &Context, MCAsmBackend &MAB,
                                       bool LabelSections) {
   MCMachOStreamer *S = new MCMachOStreamer(Context, MAB, OS, CE,
                                            DWARFMustBeAtTheEnd, LabelSections);
+  const Triple &TT = Context.getObjectFileInfo()->getTargetTriple();
+  if (TT.isOSDarwin()) {
+    unsigned Major, Minor, Update;
+    TT.getOSVersion(Major, Minor, Update);
+    // If there is a version specified, Major will be non-zero.
+    if (Major)
+      S->EmitVersionMin((TT.isMacOSX() ?
+                        MCVM_OSXVersionMin : MCVM_IOSVersionMin),
+                        Major, Minor, Update);
+  }
   if (RelaxAll)
     S->getAssembler().setRelaxAll(true);
   return S;