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diff --git a/deps/libchdr/deps/zstd-1.5.5/build/cmake/CMakeModules/AddZstdCompilationFlags.cmake b/deps/libchdr/deps/zstd-1.5.5/build/cmake/CMakeModules/AddZstdCompilationFlags.cmake
new file mode 100644
index 00000000..5f179989
--- /dev/null
+++ b/deps/libchdr/deps/zstd-1.5.5/build/cmake/CMakeModules/AddZstdCompilationFlags.cmake
@@ -0,0 +1,121 @@
+include(CheckCXXCompilerFlag)
+include(CheckCCompilerFlag)
+# VERSION_GREATER_EQUAL requires CMake 3.7 or later.
+# https://cmake.org/cmake/help/latest/command/if.html#version-greater-equal
+if (CMAKE_VERSION VERSION_LESS 3.18)
+    set(ZSTD_HAVE_CHECK_LINKER_FLAG false)
+else ()
+    set(ZSTD_HAVE_CHECK_LINKER_FLAG true)
+endif ()
+if (ZSTD_HAVE_CHECK_LINKER_FLAG)
+    include(CheckLinkerFlag)
+endif()
+
+function(EnableCompilerFlag _flag _C _CXX _LD)
+    string(REGEX REPLACE "\\+" "PLUS" varname "${_flag}")
+    string(REGEX REPLACE "[^A-Za-z0-9]+" "_" varname "${varname}")
+    string(REGEX REPLACE "^_+" "" varname "${varname}")
+    string(TOUPPER "${varname}" varname)
+    if (_C)
+        CHECK_C_COMPILER_FLAG(${_flag} C_FLAG_${varname})
+        if (C_FLAG_${varname})
+            set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${_flag}" PARENT_SCOPE)
+        endif ()
+    endif ()
+    if (_CXX)
+        CHECK_CXX_COMPILER_FLAG(${_flag} CXX_FLAG_${varname})
+        if (CXX_FLAG_${varname})
+            set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${_flag}" PARENT_SCOPE)
+        endif ()
+    endif ()
+    if (_LD)
+        # We never add a linker flag with CMake < 3.18. We will
+        # implement CHECK_LINKER_FLAG() like feature for CMake < 3.18
+        # or require CMake >= 3.18 when we need to add a required
+        # linker flag in future.
+        #
+        # We also skip linker flags check for MSVC compilers (which includes
+        # clang-cl) since currently check_linker_flag() doesn't give correct
+        # results for this configuration,
+        # see: https://gitlab.kitware.com/cmake/cmake/-/issues/22023
+        if (ZSTD_HAVE_CHECK_LINKER_FLAG AND NOT MSVC)
+            CHECK_LINKER_FLAG(C ${_flag} LD_FLAG_${varname})
+        else ()
+            set(LD_FLAG_${varname} false)
+        endif ()
+        if (LD_FLAG_${varname})
+            set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${_flag}" PARENT_SCOPE)
+            set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${_flag}" PARENT_SCOPE)
+        endif ()
+    endif ()
+endfunction()
+
+macro(ADD_ZSTD_COMPILATION_FLAGS)
+    if (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang" OR MINGW) #Not only UNIX but also WIN32 for MinGW
+        # It's possible to select the exact standard used for compilation.
+        # It's not necessary, but can be employed for specific purposes.
+        # Note that zstd source code is compatible with both C++98 and above
+        # and C-gnu90 (c90 + long long + variadic macros ) and above
+        # EnableCompilerFlag("-std=c++11" false true) # Set C++ compilation to c++11 standard
+        # EnableCompilerFlag("-std=c99" true false)   # Set C compiation to c99 standard
+        if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND MSVC)
+            # clang-cl normally maps -Wall to -Weverything.
+            EnableCompilerFlag("/clang:-Wall" true true false)
+        else ()
+            EnableCompilerFlag("-Wall" true true false)
+        endif ()
+        EnableCompilerFlag("-Wextra" true true false)
+        EnableCompilerFlag("-Wundef" true true false)
+        EnableCompilerFlag("-Wshadow" true true false)
+        EnableCompilerFlag("-Wcast-align" true true false)
+        EnableCompilerFlag("-Wcast-qual" true true false)
+        EnableCompilerFlag("-Wstrict-prototypes" true false false)
+        # Enable asserts in Debug mode
+        if (CMAKE_BUILD_TYPE MATCHES "Debug")
+            EnableCompilerFlag("-DDEBUGLEVEL=1" true true false)
+        endif ()
+        # Add noexecstack flags
+        # LDFLAGS
+        EnableCompilerFlag("-z noexecstack" false false true)
+        # CFLAGS & CXXFLAGS
+        EnableCompilerFlag("-Qunused-arguments" true true false)
+        EnableCompilerFlag("-Wa,--noexecstack" true true false)
+    elseif (MSVC) # Add specific compilation flags for Windows Visual
+
+        set(ACTIVATE_MULTITHREADED_COMPILATION "ON" CACHE BOOL "activate multi-threaded compilation (/MP flag)")
+        if (CMAKE_GENERATOR MATCHES "Visual Studio" AND ACTIVATE_MULTITHREADED_COMPILATION)
+            EnableCompilerFlag("/MP" true true false)
+        endif ()
+
+        # UNICODE SUPPORT
+        EnableCompilerFlag("/D_UNICODE" true true false)
+        EnableCompilerFlag("/DUNICODE" true true false)
+        # Enable asserts in Debug mode
+        if (CMAKE_BUILD_TYPE MATCHES "Debug")
+            EnableCompilerFlag("/DDEBUGLEVEL=1" true true false)
+        endif ()
+    endif ()
+
+    # Remove duplicates compilation flags
+    foreach (flag_var CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
+             CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
+             CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
+             CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
+        if( ${flag_var} )
+            separate_arguments(${flag_var})
+            string(REPLACE ";" " " ${flag_var} "${${flag_var}}")
+        endif()
+    endforeach ()
+
+    if (MSVC AND ZSTD_USE_STATIC_RUNTIME)
+        foreach (flag_var CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
+                 CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
+                 CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
+                 CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
+            if ( ${flag_var} )
+                string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
+            endif()
+        endforeach ()
+    endif ()
+
+endmacro()