Get rid of CMake export headers

[athre0z]

This PR gets rid of the CMake generated ZycoreExportConfig.h header. It's annoying to deal with in non-CMake environments because CMake generates it for one specific compiler (so you can't just generate it once and use it everywhere) and also doesn't really provide much that we couldn't just as well detect at compile time.

Because the previous exports created by CMake were rather cryptic, I also took the opportunity to rename them:

• ZYCORE_STATIC_DEFINE -> ZYCORE_STATIC_BUILD
• Zycore_EXPORTS -> ZYCORE_SHOULD_EXPORT

There was a third define that we manually defined previously, ZYCORE_EXPORTS (mind the casing), which was seemingly unused, so I removed it.

Because we don't have CI here, I created a branch in the Zydis repo and updated the submodule. Builds just fine, results are here.

Once approved, I'll apply the same changes to Zydis.

[athre0z]

This renames the default of Zycore_EXPORTS -> ZYCORE_SHOULD_EXPORT.

[flobernd]

LGTM!

Let's carefully test again after the Zydis follow-up PR.

[flobernd]

Btw, could you please add something unrelated (must be right below the includes on top):

if (NOT DEFINED CMAKE_ARCHIVE_OUTPUT_DIRECTORY)
    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
endif()
if (NOT DEFINED CMAKE_LIBRARY_OUTPUT_DIRECTORY)
    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
endif()
if (NOT DEFINED CMAKE_RUNTIME_OUTPUT_DIRECTORY)
    set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})
endif()

I found on Windows the .dll files are placed in sub-directories which makes it impossible to run/debug the applications in case of shared-build.

After adding the above lines, the libraries (shared and static) are always placed in the top-level binary directory.

For Zycore it should not make a difference, but for Zydis and Zyrex it improves things (will create a PR later, if you are fine with the changes).

[athre0z]

Let's do that in a different PR after we figured out how to best do this in the discussion here.

[Tachi107]

I'm a bit late, but dropping GenerateExportHeader also means that all the header files will now be the same on all architectures, making it possible to install multiple copies of the zycore/zydis packages compiled for different architectures in Debian, useful in cross-compilation environments. Thanks!