[mach-o] Add support for -S option
The darwin linker does not process dwarf debug info. Instead it produces a
"debug map" in the output file which points back to the original .o files for
anything that wants debug info (e.g. debugger).
The -S option means "don't add a debug map". lld for mach-o currently does
not generate the debug map, so there is nothing to do when this option is used.
But we need to process the option to get existing projects building.
llvm-svn: 221432
diff --git a/lld/lib/ReaderWriter/MachO/MachOLinkingContext.cpp b/lld/lib/ReaderWriter/MachO/MachOLinkingContext.cpp
index b99ecc8..85c20b3 100644
--- a/lld/lib/ReaderWriter/MachO/MachOLinkingContext.cpp
+++ b/lld/lib/ReaderWriter/MachO/MachOLinkingContext.cpp
@@ -145,7 +145,8 @@
_compatibilityVersion(0), _currentVersion(0), _deadStrippableDylib(false),
_printAtoms(false), _testingFileUsage(false), _keepPrivateExterns(false),
_demangle(false), _archHandler(nullptr),
- _exportMode(ExportMode::globals) {}
+ _exportMode(ExportMode::globals),
+ _debugInfoMode(DebugInfoMode::addDebugMap) {}
MachOLinkingContext::~MachOLinkingContext() {}