--- thirdparty/CMakeLists.txt.orig	2025-08-27 21:41:50 UTC
+++ thirdparty/CMakeLists.txt
@@ -7,55 +7,9 @@ if(ARES_ENABLE_CHD)
 option(ARES_ENABLE_CHD "Enable CHD format support via libchdr" ON)
 
 if(ARES_ENABLE_CHD)
-  # lzma
-  add_subdirectory(libchdr/deps/lzma-24.05 EXCLUDE_FROM_ALL)
-  list(APPEND CHDR_LIBS lzma)
-  list(APPEND CHDR_INCLUDES lzma)
-
-  if(OS_MACOS)
-    option(WITH_SYSTEM_ZLIB "Use system zlib" ON)
-  endif()
-  # zlib
-  if(WITH_SYSTEM_ZLIB)
-    find_package(ZLIB REQUIRED)
-    list(APPEND PLATFORM_LIBS ZLIB::ZLIB)
-  else()
-    option(ZLIB_BUILD_EXAMPLES "Enable Zlib Examples" OFF)
-    add_subdirectory(libchdr/deps/zlib-1.3.1 EXCLUDE_FROM_ALL)
-    set_target_properties(
-      zlibstatic
-      PROPERTIES POSITION_INDEPENDENT_CODE ON FOLDER thirdparty PREFIX ""
-    )
-    list(APPEND CHDR_LIBS zlibstatic)
-  endif()
-
-  # zstd
-  option(ZSTD_BUILD_SHARED "BUILD SHARED LIBRARIES" OFF)
-  option(ZSTD_BUILD_PROGRAMS "BUILD PROGRAMS" OFF)
-  add_subdirectory(libchdr/deps/zstd-1.5.6/build/cmake EXCLUDE_FROM_ALL)
-  list(APPEND CHDR_LIBS libzstd_static)
-  #--------------------------------------------------
-  # chdr
-  #--------------------------------------------------
-
-  set(
-    CHDR_SOURCES
-    libchdr/src/libchdr_bitstream.c
-    libchdr/src/libchdr_cdrom.c
-    libchdr/src/libchdr_chd.c
-    libchdr/src/libchdr_flac.c
-    libchdr/src/libchdr_huffman.c
-  )
-
-  list(APPEND CHDR_INCLUDES ${CMAKE_CURRENT_BINARY_DIR}/libchdr/include)
-
-  add_library(chdr-static STATIC ${CHDR_SOURCES})
-  target_include_directories(chdr-static PUBLIC ${CHDR_INCLUDES} PUBLIC libchdr/include)
-  target_link_libraries(chdr-static PRIVATE ${CHDR_LIBS} ${PLATFORM_LIBS})
-  target_compile_options(
-    chdr-static
-    PRIVATE $<$<CXX_COMPILER_ID:Clang,AppleClang>:-Wno-unreachable-code -Wno-unused-function>
-  )
+  find_package(PkgConfig REQUIRED)
+  pkg_check_modules(libchdr REQUIRED IMPORTED_TARGET GLOBAL libchdr)
+  add_library(chdr-static ALIAS PkgConfig::libchdr)
 endif()
 
 add_library(
@@ -111,12 +65,4 @@ set_target_properties(sljit PROPERTIES FOLDER thirdpar
 set_target_properties(ymfm PROPERTIES FOLDER thirdparty PREFIX "")
 set_target_properties(tzxfile PROPERTIES FOLDER thirdparty PREFIX "")
 set_target_properties(sljit PROPERTIES FOLDER thirdparty PREFIX "")
-if(ARES_ENABLE_CHD)
-  set_target_properties(chdr-static PROPERTIES FOLDER thirdparty PREFIX "")
-  if(NOT WITH_SYSTEM_ZLIB)
-    set_target_properties(zlib PROPERTIES FOLDER thirdparty PREFIX "")
-  endif()
-  set_target_properties(lzma PROPERTIES FOLDER thirdparty PREFIX "")
-  set_target_properties(libzstd_static PROPERTIES FOLDER thirdparty PREFIX "")
-endif()
 set_target_properties(qon PROPERTIES FOLDER thirdparty PREFIX "")
\ No newline at end of file