On 12/11/19 12:22 PM, Jonathan Wakely wrote:
> On 11/12/19 11:16 +0000, Jonathan Wakely wrote:
>> On 11/12/19 08:29 +0100, François Dumont wrote:
>>> I plan to commit this tomorrow.
>>>
>>> Note that rather than just adding the missing 
>>> _GLIBCXX_[BEGIN,END]_VERSION_NAMESPACE I also move anonymous 
>>> namespace usage outside std namespace. Let me know if it was 
>>> intentional.
>>
>> It was intentional, why move it?
>>
>> Adding the BEGIN/END_VERSION macros is unnecessary. Those namespaces
>> are inline, so std::random_device already refers to
>> std::__8::random_device when the original declaration was in the
>> versioned namespace.
>>
>> The only fix needed here seems to be qualifying std::isdigit (and
>> strictly-speaking we should also include <cctype> to declare that).
>
> I was curious why that qualification is needed. Th problem is that
> <ctype.h> is being indirectly included by some other header, and so is
> <locale>, so the declarations visible are ::isdigit(int) and
> std::__8::isdigit<CharT>(CharT, const locale&). Even after including
> <cctype> we still can't call it unqualified, because <cctype> doesn't
> use the versioned namespace:

Yes, this is the other patch I wanted to propose. Make sure that tr1 
namespace is always defined consistently with the version namespace.

For instance 17_intro/headers/c++2011/parallel_mode.cc is failing at the 
moment with:

/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/tr1/gamma.tcc:292: 
error: reference to 'tr1' is ambiguous
In file included from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/tr1/random:45,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/random_number.h:36,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/partition.h:38,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/quicksort.h:36,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/sort.h:48,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/algo.h:45,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/algorithm:37,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/algorithm:80,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/stdc++.h:65,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/extc++.h:32,
                  from 
/home/fdt/dev/gcc/git/libstdc++-v3/testsuite/17_intro/headers/c++2011/parallel_mode.cc:24:
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/tr1/type_traits:40: 
note: candidates are: 'namespace std::__8::tr1 { }'
In file included from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/types.h:37,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/parallel.h:38,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/base.h:40,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/parallel/algobase.h:40,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/stl_algobase.h:2071,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/bits/char_traits.h:39,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/ios:40,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/istream:38,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/sstream:38,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/complex:45,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/ccomplex:39,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/stdc++.h:54,
                  from 
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu/bits/extc++.h:32,
                  from 
/home/fdt/dev/gcc/git/libstdc++-v3/testsuite/17_intro/headers/c++2011/parallel_mode.cc:24:
/home/fdt/dev/gcc/build_versioned_ns/x86_64-pc-linux-gnu/libstdc++-v3/include/tr1/cstdint:61: 
note:                 'namespace std::tr1 { }'

Tested under Linux x86_64 normal and versioned namespace.

Ok to commit ?

François