error message: boost/spirit/home/classic/phoenix/closures.hpp:274:30: error: default initialization of an object of const type 'const index<0>' without a user-provided default constructor On Saturday, September 3, 2022 at 08:48:54 PM PDT, David Frank wrote: I'm currently using version 60, it failed to compile with openssl 3.0.5. So I need to upgrade to a version that works. Thanks.