[Bug libstdc++/82644] Non-standard hypergeometric special functions defined in strict modes

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82644

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Bah, now we have failures for TR1 with -std=c++17 or -std=c++2a:


$ ~/gcc/8/bin/g++ -std=c++17 -include tr1/cmath -x c++ /dev/null 
In file included from <command-line>:
/home/jwakely/gcc/8/include/c++/8.0.1/tr1/cmath:1163:20: error:
‘__gnu_cxx::conf_hypergf’ has not been declared
   using __gnu_cxx::conf_hypergf;
                    ^~~~~~~~~~~~
/home/jwakely/gcc/8/include/c++/8.0.1/tr1/cmath:1164:20: error:
‘__gnu_cxx::conf_hypergl’ has not been declared
   using __gnu_cxx::conf_hypergl;
                    ^~~~~~~~~~~~
/home/jwakely/gcc/8/include/c++/8.0.1/tr1/cmath:1165:20: error:
‘__gnu_cxx::conf_hyperg’ has not been declared
   using __gnu_cxx::conf_hyperg;
                    ^~~~~~~~~~~
/home/jwakely/gcc/8/include/c++/8.0.1/tr1/cmath:1203:20: error:
‘__gnu_cxx::hypergf’ has not been declared
   using __gnu_cxx::hypergf;
                    ^~~~~~~
/home/jwakely/gcc/8/include/c++/8.0.1/tr1/cmath:1204:20: error:
‘__gnu_cxx::hypergl’ has not been declared
   using __gnu_cxx::hypergl;
                    ^~~~~~~
/home/jwakely/gcc/8/include/c++/8.0.1/tr1/cmath:1205:20: error:
‘__gnu_cxx::hyperg’ has not been declared
   using __gnu_cxx::hyperg;
                    ^~~~~~