Fetch zstd as standalone lib (#192)

Reviewed-on: https://git.madvoxel.net/OpenVulkano/OpenVulkano/pulls/192
Reviewed-by: Georg Hagen <georg.hagen@madvoxel.com>
Co-authored-by: ohyzha <oleksii.hyzha.ext@madvoxel.com>
Co-committed-by: ohyzha <oleksii.hyzha.ext@madvoxel.com>

3rdParty/libarchive/CMakeLists.txt

@@ -16,7 +16,6 @@ if (NOT LibArchive_FOUND)
     endif()
 else ()
     message("Using system LibArchive")
-    set(USING_SYSTEM_LIBARCHIVE ON PARENT_SCOPE)
 endif ()
 
 function(LinkLibArchive TARGET)
@@ -27,8 +26,8 @@ function(LinkLibArchive TARGET)
     endif()
     set(ZLIB_USE_STATIC_LIBS ON)
     find_package(ZLIB REQUIRED)
+    find_package(zstd REQUIRED)
     find_package(LZ4 QUIET)
-    find_package(zstd QUIET)
     find_package(BZip2 QUIET)
     find_package(LibLZMA QUIET)
     find_package(LibXml2 QUIET)

cmake/modules/Findzstd.cmake

@@ -106,7 +106,7 @@ find_library(zstd_SHARED_LIBRARY
 
 set(CMAKE_FIND_LIBRARY_SUFFIXES ".a" ".lib")
 find_library(zstd_STATIC_LIBRARY
-  NAMES zstd ${_zstd_win_static_name}
+  NAMES zstd ${_zstd_win_static_name} zstd_static
   HINTS ${PC_zstd_LIBDIR}
 )
 set(CMAKE_FIND_LIBRARY_SUFFIXES ${_previous_suffixes})