The compiler is allowed to add a linker option starting with -?<name> to
.drectve section. If the linker can interpret -<name>, it's processed as if
there's no question mark there. If not, such option is silently ignored.

This is a COFF's feature to allow the compiler to emit new linker options
while keeping compatibility with older linkers.

llvm-svn: 189897

llvm-svn: 189614

llvm-svn: 189308

in order to match link.exe's behaviour.

Patch by Ron Ofir.

llvm-svn: 189159

This used to be handled automagically by the option parsing library,
but after LLVM r188314, we should handle it ourselves.

No functionality change, but adds a test.

llvm-svn: 188318

This patch does not change the behavior of LLD, but changes the output of the
help text. We want to show the help text with Windows style indicator rather
than Unix style indicator.

llvm-svn: 187544

llvm-svn: 187539

llvm-svn: 187243

llvm-svn: 187162

llvm-svn: 187095

It's still not as simple as it should be because of the many duplicated
lines, but it's at least better than before.

llvm-svn: 187091

The /include command line option is equivalent to Unix --undefined
option, which forces the linker to resolve the given symbol name
as if it's an unresolved symbol in one of its input files. This feature
is used to link an additional object file or a shared library that no
input files refer to.

llvm-svn: 187084

llvm-svn: 186957

llvm-svn: 186911

llvm-svn: 186739

llvm-svn: 186650

The logic to search a library from the library paths will be implemented
in a different patch.

llvm-svn: 186644

llvm-svn: 186428

llvm-svn: 184050

llvm-svn: 183724

llvm-svn: 183622

llvm-svn: 183604

llvm-svn: 183034

The code to actually consume these flags will be added soon.

llvm-svn: 182824

Add WinLinkDriver and connect it to the existing COFF reader. Remaining
parts are still stubs, so while it can now read a COFF file, it still
cannot link or output PE/COFF files yet.

Reviewers: Bigcheese

CC: llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D865

llvm-svn: 182784