--- zxing-cpp-2.0.0/CMakeLists.txt	2023-08-08 13:26:51.918694430 +0200
+++ zxing-cpp-2.0.0/CMakeLists.txt	2023-08-08 13:38:00.669700216 +0200
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.14)
+cmake_minimum_required (VERSION 3.5)
 
 project(ZXing)
 
@@ -42,8 +42,7 @@
     set (CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
 endif()
 
-set (CMAKE_CXX_STANDARD 17)
-set (CMAKE_CXX_EXTENSIONS OFF)
+set (CMAKE_CXX_EXTENSIONS ON)
 
 if (NOT (BUILD_READERS OR BUILD_WRITERS))
     message(FATAL_ERROR "At least one of BUILD_READERS/BUILD_WRITERS must be enabled.")
--- zxing-cpp-2.0.0/core/CMakeLists.txt	2023-08-08 13:26:51.918694430 +0200
+++ zxing-cpp-2.0.0/core/CMakeLists.txt	2023-08-08 13:32:23.494204854 +0200
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.14)
+cmake_minimum_required (VERSION 3.5)
 
 project (ZXing VERSION "2.0.0")
 set (ZXING_SONAME 3) # see https://github.com/zxing-cpp/zxing-cpp/issues/333
@@ -457,8 +457,6 @@
     )
 endif()
 
-target_compile_features(ZXing PUBLIC cxx_std_17)
-
 target_link_libraries (ZXing PRIVATE Threads::Threads)
 
 add_library(ZXing::ZXing ALIAS ZXing)