[pkg-boost-devel] Bug#778220: Bug#778220: libboost-thread-dev: Build failure when compiling example program for boost::call_once with GCC 5

[Dimitri John Ledkov]

Hello,

The below bug is now fixed via uploads of boost1.54 & boost1.55.
Experimental should not have been ever affected as boost1.57 does not
suffer from this there.

Hence I'll be closing this bug report.

Regards,

Dimitri.

On 12 February 2015 at 12:44, Gunnar Beutner <gunnar at beutner.name> wrote:
> Package: libboost-thread-dev
> Version: 1.55.0.2
> Severity: normal
>
> Dear Maintainer,
>
> the following example program fails to compile with GCC 5:
>
> #include <boost/thread/once.hpp>
>
> static boost::once_flag init_flag = BOOST_ONCE_INIT;
>
> static void once_init(void)
> {
>
> }
>
> int main(int argc, char **argv)
> {
>         boost::call_once(&once_init, init_flag);
> }
>
> Trying to compile this program with GCC 5 (version from dpkg -l: 5-20150205-1) yields the following error message:
>
> gunnar at debian:~$ g++ -o test test.cpp
> In file included from test.cpp:1:0:
> /usr/include/boost/thread/once.hpp: In instantiation of 'void boost::call_once(Function, boost::once_flag&) [with Function = void (*)()]':
> test.cpp:12:43:   required from here
> /usr/include/boost/thread/once.hpp:38:18: error: no matching function for call to 'call_once(boost::once_flag&, void (*&)())'
>          call_once(flag,func);
>                   ^
> In file included from /usr/include/boost/thread/once.hpp:20:0,
>                  from test.cpp:1:
> /usr/include/boost/thread/pthread/once_atomic.hpp:121:15: note: candidate: template<class Function, class ... ArgTypes> void boost::call_once(boost::once_flag&, boost::detail::thread_move_t<T>, boost::detail::thread_move_t<Args>...)
>    inline void call_once(once_flag& flag, BOOST_THREAD_RV_REF(Function) f, BOOST_THREAD_RV_REF(ArgTypes)... args)
>                ^
> /usr/include/boost/thread/pthread/once_atomic.hpp:121:15: note:   template argument deduction/substitution failed:
> In file included from test.cpp:1:0:
> /usr/include/boost/thread/once.hpp:38:18: note:   mismatched types 'boost::detail::thread_move_t<T>' and 'void (*)()'
>          call_once(flag,func);
>                   ^
> /usr/include/boost/thread/once.hpp:35:13: note: candidate: template<class Function> void boost::call_once(Function, boost::once_flag&)
>  inline void call_once(Function func,once_flag& flag)
>              ^
> /usr/include/boost/thread/once.hpp:35:13: note:   template argument deduction/substitution failed:
> /usr/include/boost/thread/once.hpp:38:18: note:   cannot convert 'func' (type 'void (*)()') to type 'boost::once_flag&'
>          call_once(flag,func);
>                   ^
>
> I can compile the program without any problems using GCC 4.7.2 and Clang 3.0.
>
> -- System Information:
> Debian Release: 8.0
>   APT prefers unstable
>   APT policy: (500, 'unstable'), (1, 'experimental')
> Architecture: amd64 (x86_64)
>
> Kernel: Linux 3.16.0-4-amd64 (SMP w/1 CPU core)
> Locale: LANG=en_US.UTF-8, LC_CTYPE=UTF-8 (charmap=locale: Cannot set LC_CTYPE to default locale: No such file or directory
> locale: Cannot set LC_ALL to default locale: No such file or directory
> ANSI_X3.4-1968)
> Shell: /bin/sh linked to /bin/dash
> Init: systemd (via /run/systemd/system)
>
> Versions of packages libboost-thread-dev depends on:
> ii  libboost-thread1.55-dev  1.55.0+dfsg-3
>
> libboost-thread-dev recommends no packages.
>
> libboost-thread-dev suggests no packages.
>
> -- debconf information:
> perl: warning: Setting locale failed.
> perl: warning: Please check that your locale settings:
>         LANGUAGE = "en_US:en",
>         LC_ALL = (unset),
>         LC_CTYPE = "UTF-8",
>         LANG = "en_US.UTF-8"
>     are supported and installed on your system.
> perl: warning: Falling back to a fallback locale ("en_US.UTF-8").
> locale: Cannot set LC_CTYPE to default locale: No such file or directory
> locale: Cannot set LC_ALL to default locale: No such file or directory
>
> _______________________________________________
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> pkg-boost-devel at lists.alioth.debian.org
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-- 
Regards,

Dimitri.