Minor doc update in the cmake system.

diff --git a/cmake/checks/check_01_cxx_features.cmake b/cmake/checks/check_01_cxx_features.cmake
index 9329952e5007d616ba099d658d8994bb88c7991a..4f7556d04052569fec2fa2eac1a82d932496bbe9 100644 (file)
--- a/cmake/checks/check_01_cxx_features.cmake
+++ b/cmake/checks/check_01_cxx_features.cmake
@@ -63,9 +63,9 @@ MACRO(_test_cxx20_support)
     )
 
   # Strictly speaking "201709L" indicates support for a preliminary version
-  # of C++20 standard (which will have "202002L" when finalized). gcc-10
+  # of the C++20 standard (which will have "202002L" when finalized). gcc-10
   # exports this version number when configured with C++20 support.
-  # clang-10 exports the final "202002L" version instead.
+  # clang-10 exports the final "202002L" version instead, as does gcc-11.
   CHECK_CXX_SOURCE_COMPILES(
     "
     #include <cmath>