vcpkg/ports/ktx/0001-Use-vcpkg-zstd.patch

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bc679fd1..c726fa71 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -185,7 +185,6 @@ set(KTX_MAIN_SRC
     lib/basisu/transcoder/basisu_transcoder.cpp
     lib/basisu/transcoder/basisu_transcoder.h
     lib/basisu/transcoder/basisu.h
-    lib/basisu/zstd/zstd.c
     lib/checkheader.c
     lib/dfdutils/createdfd.c
     lib/dfdutils/colourspaces.c
@@ -304,7 +303,6 @@ macro(commom_lib_settings lib write)
         $<INSTALL_INTERFACE:lib/basisu/transcoder>
 
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/lib/basisu/zstd>
-        $<INSTALL_INTERFACE:lib/basisu/zstd>
 
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/other_include>
         $<INSTALL_INTERFACE:other_include>
@@ -390,6 +388,10 @@ macro(commom_lib_settings lib write)
         target_compile_definitions(${lib} PUBLIC KTX_FEATURE_KTX2)
     endif()
 
+    # Use vcpkg zstd
+    find_package(zstd CONFIG REQUIRED)
+    target_link_libraries(${lib} PRIVATE $<IF:$<TARGET_EXISTS:zstd::libzstd_shared>,zstd::libzstd_shared,zstd::libzstd_static>)
+
     if(WIN32)
         # By wrapping in generator expression we force multi configuration
         # generators (like Visual Studio) to take the exact path and not
diff --git a/cmake/KtxConfig.cmake b/cmake/KtxConfig.cmake
index 6386ba2f..537bf4f2 100644
--- a/cmake/KtxConfig.cmake
+++ b/cmake/KtxConfig.cmake
@@ -1,7 +1,8 @@
 # Copyright 2015-2020 The Khronos Group Inc.
 # SPDX-License-Identifier: Apache-2.0
 
-# include(CMakeFindDependencyMacro)
-# find_dependency()
+include(CMakeFindDependencyMacro)
+find_dependency(Threads)
+find_dependency(zstd CONFIG)
 
 include("${CMAKE_CURRENT_LIST_DIR}/KtxTargets.cmake")
diff --git a/lib/basisu/CMakeLists.txt b/lib/basisu/CMakeLists.txt
index 492233ae..8786d16c 100644
--- a/lib/basisu/CMakeLists.txt
+++ b/lib/basisu/CMakeLists.txt
@@ -146,7 +146,7 @@ set(BASISU_SRC_LIST ${COMMON_SRC_LIST}
 	)
 
 if (ZSTD)
-	set(BASISU_SRC_LIST ${BASISU_SRC_LIST} zstd/zstd.c)
+	set(ZSTD_LIBRARIES "$<IF:$<TARGET_EXISTS:zstd::libzstd_shared>,zstd::libzstd_shared,zstd::libzstd_static>")
 endif()
 
 if (APPLE)
@@ -165,6 +165,10 @@ else()
 	target_compile_definitions(basisu PRIVATE BASISD_SUPPORT_KTX2_ZSTD=0)
 endif()
 
+if(ZSTD_LIBRARIES)
+    target_link_libraries(basisu ${ZSTD_LIBRARIES})
+endif()
+
 if (NOT MSVC)
 	# For Non-Windows builds, let cmake try and find the system OpenCL headers/libs for us.
 	if (OPENCL_FOUND)
diff --git a/lib/basisu/webgl/encoder/CMakeLists.txt b/lib/basisu/webgl/encoder/CMakeLists.txt
index 588d91b4..0b380129 100644
--- a/lib/basisu/webgl/encoder/CMakeLists.txt
+++ b/lib/basisu/webgl/encoder/CMakeLists.txt
@@ -34,9 +34,7 @@ if (EMSCRIPTEN)
   )
 
   if (KTX2_ZSTANDARD)
-  	set(SRC_LIST ${SRC_LIST}
-		../../zstd/zstd.c
-	)
+    set(ZSTD_LIBRARIES "$<IF:$<TARGET_EXISTS:zstd::libzstd_shared>,zstd::libzstd_shared,zstd::libzstd_static>")
 	set(ZSTD_DEFINITION BASISD_SUPPORT_KTX2_ZSTD=1)
   else()
   	set(ZSTD_DEFINITION BASISD_SUPPORT_KTX2_ZSTD=0)
@@ -56,6 +54,10 @@ if (EMSCRIPTEN)
   
   target_include_directories(basis_encoder.js PRIVATE ../../transcoder)
 
+  if(ZSTD_LIBRARIES)
+      target_link_libraries(basis_encoder.js ${ZSTD_LIBRARIES})
+  endif()
+
   set_target_properties(basis_encoder.js PROPERTIES
       OUTPUT_NAME "basis_encoder"
       SUFFIX ".js"
diff --git a/lib/basisu/webgl/transcoder/CMakeLists.txt b/lib/basisu/webgl/transcoder/CMakeLists.txt
index 372653de..f75e3a35 100644
--- a/lib/basisu/webgl/transcoder/CMakeLists.txt
+++ b/lib/basisu/webgl/transcoder/CMakeLists.txt
@@ -28,9 +28,7 @@ if (EMSCRIPTEN)
   endif()
   
   if (KTX2_ZSTANDARD)
- 	set(SRC_LIST ${SRC_LIST}
-		../../zstd/zstddeclib.c
-	)
+    set(ZSTD_LIBRARIES "$<IF:$<TARGET_EXISTS:zstd::libzstd_shared>,zstd::libzstd_shared,zstd::libzstd_static>")
 	set(ZSTD_DEFINITION BASISD_SUPPORT_KTX2_ZSTD=1)
   else()
   	set(ZSTD_DEFINITION BASISD_SUPPORT_KTX2_ZSTD=0)
@@ -45,6 +43,10 @@ if (EMSCRIPTEN)
   target_compile_options(basis_transcoder.js PRIVATE -O3 -fno-strict-aliasing)
   target_include_directories(basis_transcoder.js PRIVATE ../../transcoder)
 
+  if(ZSTD_LIBRARIES)
+      target_link_libraries(basis_transcoder.js ${ZSTD_LIBRARIES})
+  endif()
+
   set_target_properties(basis_transcoder.js PROPERTIES
       OUTPUT_NAME "basis_transcoder"
       SUFFIX ".js"