Deprecate Clang < 7 and MSVC < 2019 (aka 19.20, aka 16.0, aka 14.20).

README.md

@@ -77,6 +77,19 @@ The thread block uses these storage types to statically allocate the union of
 shared memory needed by the thread block.  (Alternatively these storage types
 could be aliased to global memory allocations).
 
+<br><hr>
+<h3>Supported Compilers</h3>
+
+CUB is regularly tested using the specified versions of the following
+compilers. Unsupported versions may emit deprecation warnings, which can be
+silenced by defining CUB_IGNORE_DEPRECATED_COMPILER during compilation.
+
+- NVCC 11.0+
+- NVC++ 20.9+
+- GCC 5+
+- Clang 7+
+- MSVC 2019+ (19.20/16.0/14.20)
+
 <br><hr>
 <h3>Releases</h3>
 

cub/util_cpp_dialect.cuh

@@ -109,18 +109,18 @@
 #endif
 
 #define CUB_COMPILER_DEPRECATION(REQ, FIX) \
-  CUB_COMP_DEPR_IMPL(CUB requires REQ. Please FIX. Define CUB_IGNORE_DEPRECATED_CPP_DIALECT to suppress this message.)
+  CUB_COMP_DEPR_IMPL(CUB requires at least REQ. Please FIX. Define CUB_IGNORE_DEPRECATED_CPP_DIALECT to suppress this message.)
 
 // Minimum required compiler checks:
 #ifndef CUB_IGNORE_DEPRECATED_COMPILER
 #  if CUB_HOST_COMPILER == CUB_HOST_COMPILER_GCC && CUB_GCC_VERSION < 50000
      CUB_COMPILER_DEPRECATION(GCC 5.0, upgrade your compiler);
 #  endif
-#  if CUB_HOST_COMPILER == CUB_HOST_COMPILER_CLANG && CUB_CLANG_VERSION < 60000
-     CUB_COMPILER_DEPRECATION(Clang 6.0, upgrade your compiler);
+#  if CUB_HOST_COMPILER == CUB_HOST_COMPILER_CLANG && CUB_CLANG_VERSION < 70000
+     CUB_COMPILER_DEPRECATION(Clang 7.0, upgrade your compiler);
 #  endif
-#  if CUB_HOST_COMPILER == CUB_HOST_COMPILER_MSVC && CUB_MSVC_VERSION < 1910
-     CUB_COMPILER_DEPRECATION(MSVC 2017, upgrade your compiler);
+#  if CUB_HOST_COMPILER == CUB_HOST_COMPILER_MSVC && CUB_MSVC_VERSION < 1920
+     CUB_COMPILER_DEPRECATION(MSVC 2019 (19.20/16.0/14.20), upgrade your compiler);
 #  endif
 #endif