--- thirdparty/CMakeLists.txt.orig	2026-01-30 15:43:06 UTC
+++ thirdparty/CMakeLists.txt
@@ -16,50 +16,50 @@ endfunction ()
     include (${ARGV})
 endfunction ()
 
-set (SUBMODULES_MISSING FALSE)
-foreach (path IN ITEMS
-    brotli/LICENSE
-    gtest/LICENSE
-    libbacktrace/LICENSE
-    libpng/LICENSE
-    snappy/COPYING
-    zlib/README
-    zstd/LICENSE
-    directxmath/LICENSE
-)
-    if (NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${path}")
-        message (SEND_ERROR "error: ${CMAKE_CURRENT_SOURCE_DIR}/${path} does not exist")
-        set (SUBMODULES_MISSING TRUE)
-    endif ()
-endforeach ()
-if (SUBMODULES_MISSING)
-    message (FATAL_ERROR "Update Git submodules by running\ngit submodule update --init --depth 1 --recursive")
-endif ()
+#set (SUBMODULES_MISSING FALSE)
+#foreach (path IN ITEMS
+#    brotli/LICENSE
+#    gtest/LICENSE
+#    libbacktrace/LICENSE
+#    libpng/LICENSE
+#    snappy/COPYING
+#    zlib/README
+#    zstd/LICENSE
+#    directxmath/LICENSE
+#)
+#    if (NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${path}")
+#        message (SEND_ERROR "error: ${CMAKE_CURRENT_SOURCE_DIR}/${path} does not exist")
+#        set (SUBMODULES_MISSING TRUE)
+#    endif ()
+#endforeach ()
+#if (SUBMODULES_MISSING)
+#    message (FATAL_ERROR "Update Git submodules by running\ngit submodule update --init --depth 1 --recursive")
+#endif ()
 
-if (ENABLE_STATIC_SNAPPY OR NOT Snappy_FOUND)
-    message (STATUS "Using bundled Snappy")
-    include_with_scope (snappy.cmake)
-endif ()
+#if (ENABLE_STATIC_SNAPPY OR NOT Snappy_FOUND)
+#    message (STATUS "Using bundled Snappy")
+#    include_with_scope (snappy.cmake)
+#endif ()
 
-if (NOT ZLIB_FOUND)
-    message (STATUS "Using bundled ZLIB")
-    include_with_scope (zlib.cmake)
-endif ()
+#if (NOT ZLIB_FOUND)
+#    message (STATUS "Using bundled ZLIB")
+#    include_with_scope (zlib.cmake)
+#endif ()
 
-if (NOT PNG_FOUND)
-    message (STATUS "Using bundled PNG")
-    include_with_scope (libpng.cmake)
-endif ()
+#if (NOT PNG_FOUND)
+#    message (STATUS "Using bundled PNG")
+#    include_with_scope (libpng.cmake)
+#endif ()
 
-if (NOT BROTLIDEC_FOUND OR NOT BROTLIENC_FOUND)
-    message (STATUS "Using bundled Brotli")
-    include_with_scope (brotli.cmake)
-endif ()
+#if (NOT BROTLIDEC_FOUND OR NOT BROTLIENC_FOUND)
+#    message (STATUS "Using bundled Brotli")
+#    include_with_scope (brotli.cmake)
+#endif ()
 
-if (NOT ZSTD_FOUND)
-    message (STATUS "Using bundled zstd")
-    include_with_scope (zstd.cmake)
-endif ()
+#if (NOT ZSTD_FOUND)
+#    message (STATUS "Using bundled zstd")
+#    include_with_scope (zstd.cmake)
+#endif ()
 
 # Seekable format (builds on top of Zstd -- included in the source but not part
 # of the shipped library)
@@ -72,28 +72,43 @@ target_include_directories(zstd_seekable PUBLIC
     ${CMAKE_CURRENT_SOURCE_DIR}/zstd/lib/common
     ${CMAKE_CURRENT_SOURCE_DIR}/zstd/contrib/seekable_format
 )
+
 target_link_libraries (zstd_seekable PUBLIC
     PkgConfig::ZSTD
 )
 
 if(NOT MSVC)
-    # Disable specific warnings that are common in zstd
+   # Disable specific warnings that are common in zstd
     target_compile_options(zstd_seekable PRIVATE -Wno-uninitialized)
 endif()
 
 target_optimize(zstd_seekable)
 
-if (CMAKE_EXECUTABLE_FORMAT STREQUAL "ELF")
-    include_with_scope (libbacktrace.cmake)
-endif ()
+#if (CMAKE_EXECUTABLE_FORMAT STREQUAL "ELF")
+#    include_with_scope (libbacktrace.cmake)
+#endif ()
 
-if (BUILD_TESTING)
-    # We use non-standard C++ flags, so we can't just use GTest's CMakeLists.txt
-    if (NOT GTEST_FOUND)
-        message (STATUS "Using bundled GTest")
-        include_with_scope (gtest.cmake)
-    endif ()
-endif ()
+#if (BUILD_TESTING)
+#    # We use non-standard C++ flags, so we can't just use GTest's CMakeLists.txt
+#    if (NOT GTEST_FOUND)
+#        message (STATUS "Using bundled GTest")
+#        include_with_scope (gtest.cmake)
+#    endif ()
+#endif ()
+
+find_path(Snappy_INCLUDE_DIR NAMES snappy.h
+  PATHS ${Snappy_ROOT_DIR} ${Snappy_ROOT_DIR}/include /usr/local/include)
+
+find_library(Snappy_LIBRARIES NAMES snappy
+  PATHS ${Snappy_ROOT_DIR} ${Snappy_ROOT_DIR}/lib /usr/local/lib)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Snappy DEFAULT_MSG Snappy_INCLUDE_DIR Snappy_LIBRARIES)
+
+if(SNAPPY_FOUND)
+  message(STATUS "Found Snappy (include: ${Snappy_INCLUDE_DIR}, library: ${Snappy_LIBRARIES})")
+  mark_as_advanced(Snappy_INCLUDE_DIR Snappy_LIBRARIES)
+endif()
 
 if (MSVC)
     add_subdirectory (getopt)