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MachO: Emit a version-min load command when possible.

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When deployment target version information is available, emit it to the
target streamer for inclusion in the object file.

rdar://11337778

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204191 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2014-03-18 22:09:08 +00:00
parent d55fc3f151
commit e133cd2ea2
1 changed files with 19 additions and 0 deletions
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19
lib/CodeGen/AsmPrinter/AsmPrinter.cpp
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@ -178,6 +178,25 @@ bool AsmPrinter::doInitialization(Module &M) {
Mang = new Mangler(TM.getDataLayout());
// Emit the version-min deplyment target directive if needed.
//
// FIXME: If we end up with a collection of these sorts of Darwin-specific
// or ELF-specific things, it may make sense to have a platform helper class
// that will work with the target helper class. For now keep it here, as the
// alternative is duplicated code in each of the target asm printers that
// use the directive, where it would need the same conditionalization
// anyway.
Triple TT(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)
OutStreamer.EmitVersionMin((TT.isMacOSX() ?
MCVM_OSXVersionMin : MCVM_IOSVersionMin),
Major, Minor, Update);
}
// Allow the target to emit any magic that it wants at the start of the file.
EmitStartOfAsmFile(M);