[LLVM-C] Add LLVM-C.dll to Windows installer package

[Wallbraker]

Summary

This is a follow up to D56781, D56774 and D35077 to makes the LLVM-C.dll file and LLVM-C.lib be installed on Windows, just like LTO.dll and LTO.lib are.

[hans]

It's hard to argue llvm-c.dll is part of the toolchain though :-/

[Wallbraker]

Thanks for the review!

I'm pretty sure libclang.[lib|dll] is only installed and not used by any of the shipped binaries so not really part of the toolchain either. Not sure about LTO.[lib|dll] tho. I would be happy if LLVM-C and libclang was offered as a separate download.

PS: I do not have commit rights so would be very grateful if somebody could commit this for me.

[hans]

In D63717#1556256, @Wallbraker wrote:

Thanks for the review!

I'm pretty sure libclang.[lib|dll] is only installed and not used by any of the shipped binaries so not really part of the toolchain either. Not sure about LTO.[lib|dll] tho. I would be happy if LLVM-C and libclang was offered as a separate download.

Yeah, it's not very consistent :-)

PS: I do not have commit rights so would be very grateful if somebody could commit this for me.

Committed in r364275.

llvm/trunk/cmake/modules/AddLLVM.cmake

macro(add_llvm_library name)
   if (ARG_MODULE AND NOT TARGET ${name})
     # Add empty "phony" target
     add_custom_target(${name})
   elseif( EXCLUDE_FROM_ALL )
     set_target_properties( ${name} PROPERTIES EXCLUDE_FROM_ALL ON)
   elseif(ARG_BUILDTREE_ONLY)
     set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS_BUILDTREE_ONLY ${name})
   else()
-    if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR ${name} STREQUAL "LTO" OR
+    if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY OR
+        ${name} STREQUAL "LTO" OR
+        ${name} STREQUAL "LLVM-C" OR
         ${name} STREQUAL "Remarks" OR
         (LLVM_LINK_LLVM_DYLIB AND ${name} STREQUAL "LLVM"))
 
       set(export_to_llvmexports)
       if(${name} IN_LIST LLVM_DISTRIBUTION_COMPONENTS OR
           (in_llvm_libs AND "llvm-libraries" IN_LIST LLVM_DISTRIBUTION_COMPONENTS) OR
           NOT LLVM_DISTRIBUTION_COMPONENTS)
         set(export_to_llvmexports EXPORT LLVMExports)