Cleanup zstd support

CMakeLists.txt

@@ -206,13 +206,11 @@ endif(ENABLE_LZMA)
 
 if(ENABLE_ZSTD)
   find_package(LibZSTD)
-  if(ZSTD_FOUND)
+  if(LIBZSTD_FOUND)
     set(HAVE_LIBZSTD 1)
-    include_directories(${ZSTD_INCLUDE_DIR})
-    set(OPTIONAL_LIBRARY ${OPTIONAL_LIBRARY} ${ZSTD_LIBRARY})
   else()
     message(WARNING "-- zstd library not found; zstd support disabled")
-  endif(ZSTD_FOUND)
+  endif(LIBZSTD_FOUND)
 endif(ENABLE_ZSTD)
 
 if (COMMONCRYPTO_FOUND)
@@ -310,7 +308,6 @@ foreach(LIB ${LIBS_PRIVATE})
 endforeach()
 string(REGEX REPLACE "-lBZip2::BZip2" "-lbz2" LIBS ${LIBS})
 string(REGEX REPLACE "-lLibLZMA::LibLZMA" "-llzma" LIBS ${LIBS})
-string(REGEX REPLACE "-lLibZSTD::LibZSTD" "-lzstd" LIBS ${LIBS})
 string(REGEX REPLACE "-lOpenSSL::Crypto" "-lssl -lcrypto" LIBS ${LIBS})
 string(REGEX REPLACE "-lZLIB::ZLIB" "-lz" LIBS ${LIBS})
 string(REGEX REPLACE "-lGnuTLS::GnuTLS" "-lgnutls" LIBS ${LIBS})

cmake/FindZstd.cmake → cmake/FindLibZSTD.cmake

@@ -29,13 +29,11 @@ include(SelectLibraryConfigurations)
 SELECT_LIBRARY_CONFIGURATIONS(ZSTD)
 
 include(FindPackageHandleStandardArgs)
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(
-    ZSTD DEFAULT_MSG
-    ZSTD_LIBRARY ZSTD_INCLUDE_DIR
+find_package_handle_standard_args(LibZSTD
+    FOUND_VAR LIBZSTD_FOUND
+    REQUIRED_VARS 
+      ZSTD_LIBRARY ZSTD_INCLUDE_DIR
+    VERSION_VAR ZSTD_VERSION
 )
 
-if (ZSTD_FOUND)
-    message(STATUS "Found Zstd: ${ZSTD_LIBRARY}")
-endif()
-
 mark_as_advanced(ZSTD_INCLUDE_DIR ZSTD_LIBRARY)

lib/CMakeLists.txt

@@ -148,7 +148,7 @@ endif()
 
 if(HAVE_LIBZSTD)
   target_sources(zip PRIVATE zip_algorithm_zstd.c)
-  target_link_libraries(zip PRIVATE LibZSTD::LibZSTD)
+  target_link_libraries(zip PRIVATE zstd)
 endif()
 
 if(HAVE_COMMONCRYPTO)