diff --git a/flang/include/flang/Common/idioms.h b/flang/include/flang/Common/idioms.h
--- a/flang/include/flang/Common/idioms.h
+++ b/flang/include/flang/Common/idioms.h
@@ -13,16 +13,6 @@
 // or that is too weird or too specific to the host C++ compiler to be
 // exposed elsewhere.
 
-#ifndef __cplusplus
-#error this is a C++ program
-#endif
-#if __cplusplus < 201703L
-#error this is a C++17 program
-#endif
-#if !__clang__ && defined __GNUC__ && __GNUC__ < 7
-#error g++ >= 7.2 is required
-#endif
-
 #include <functional>
 #include <list>
 #include <optional>