Re: Compile error (again) with GNULIB_NAMESPACE and C++ and Mingw

[Christian Biesinger]

On Wed, Feb 12, 2020 at 4:12 PM Christian Biesinger
<address@hidden> wrote:
> This was previously fixed but I again see a compile error (with gnulib
> at 4fcedca004fd13aecb5c6f235a988a5548bcb9a4)

The previous breakage was reported at
https://lists.gnu.org/archive/html/bug-gnulib/2019-11/msg00027.html

I suspect this recurrence is due to commits
36a9ca3f924853f22af5ac5228c35ca81bddf6cf /
756370637a184426d4834b47cd653fc7fee296f5

> In file included from /usr/share/mingw-w64/include/io.h:10,
>                  from gnulib/import/stdio.h:146,
>                  from gnulib/import/wchar.h:80,
>                  from
> /usr/lib/gcc/x86_64-w64-mingw32/8.3-win32/include/c++/cwchar:44,
>                  from
> /usr/lib/gcc/x86_64-w64-mingw32/8.3-win32/include/c++/bits/postypes.h:40,
>                  from
> /usr/lib/gcc/x86_64-w64-mingw32/8.3-win32/include/c++/iosfwd:40,
>                  from
> /usr/lib/gcc/x86_64-w64-mingw32/8.3-win32/include/c++/ios:38,
>                  from
> /usr/lib/gcc/x86_64-w64-mingw32/8.3-win32/include/c++/istream:38,
>                  from
> /usr/lib/gcc/x86_64-w64-mingw32/8.3-win32/include/c++/sstream:38,
>                  from test.cc:4:
> gnulib/import/wctype.h: In member function
> ‘gnulib::_gl_iswdigit_wrapper::operator
> gnulib::_gl_iswdigit_wrapper::type() const’:
> gnulib/import/wctype.h:1007:1: error: invalid conversion from ‘int
> (*)(wint_t)’ {aka ‘int (*)(short unsigned int)’} to
> ‘gnulib::_gl_iswdigit_wrapper::type’ {aka ‘int (*)(unsigned int)’}
> [-fpermissive]
>  _GL_CXXALIAS_SYS (iswdigit, int, (wint_t wc));
>  ^~~~~~~~~~~~~~~~
> gnulib/import/wctype.h: In member function
> ‘gnulib::_gl_iswxdigit_wrapper::operator
> gnulib::_gl_iswxdigit_wrapper::type() const’:
> gnulib/import/wctype.h:1042:1: error: invalid conversion from ‘int
> (*)(wint_t)’ {aka ‘int (*)(short unsigned int)’} to
> ‘gnulib::_gl_iswxdigit_wrapper::type’ {aka ‘int (*)(unsigned int)’}
> [-fpermissive]
>  _GL_CXXALIAS_SYS (iswxdigit, int, (wint_t wc));
>  ^~~~~~~~~~~~~~~~
>
> This is my testcase:
> #define GNULIB_NAMESPACE gnulib
>
> #include <config.h>
> #include <sstream>
>
> Compile with x86_64-w64-mingw32-g++ test.cc -I gnulib/import/ -I
> ../gnulib/import/ -I gnulib
>
> We have these modules enabled:
> IMPORTED_GNULIB_MODULES="\
>     alloca \
>     canonicalize-lgpl \
>     dirent \
>     dirfd \
>     errno \
>     fnmatch-gnu \
>     frexpl \
>     getcwd \
>     glob \
>     inet_ntop
>     inttypes \
>     lstat \
>     limits-h \
>     memchr \
>     memmem \
>     mkdir \
>     mkdtemp \
>     mkostemp \
>     pathmax \
>     rawmemchr \
>     readlink \
>     rename \
>     setenv \
>     signal-h \
>     strchrnul \
>     strerror_r-posix \
>     strstr \
>     strtok_r \
>     sys_stat \
>     time_r \
>     unistd \
>     unsetenv \
>     update-copyright \
>     wchar \
>     wctype-h \
> "
>
> Thanks,
> Christian