[Boost-bugs] [Boost C++ Libraries] #8696: chrono compilation error on Solaris/gcc

Subject: [Boost-bugs] [Boost C++ Libraries] #8696: chrono compilation error on Solaris/gcc
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-06-14 10:55:57

#8696: chrono compilation error on Solaris/gcc
-------------------------------------+---------------------
 Reporter:  tmmikolajczyk@…          |      Owner:  viboes
     Type:  Bugs                     |     Status:  new
Milestone:  To Be Determined         |  Component:  chrono
  Version:  Boost Development Trunk  |   Severity:  Problem
 Keywords:                           |
-------------------------------------+---------------------
 The "timegm" function is not available on Solaris (Solaris 11) when using
 the gcc toolchain. It works fine for the sunpro toolchain.
 The "timegm" manual on regular linux says (man timegm):

 "
        For a portable version of timegm(), set the TZ environment variable
 to UTC, call mktime(3) and restore
        the value of TZ.  Something like

            #include <time.h>
            #include <stdlib.h>

            time_t
            my_timegm(struct tm *tm)
            {
                time_t ret;
                char *tz;

                tz = getenv("TZ");
                setenv("TZ", "", 1);
                tzset();
                ret = mktime(tm);
                if (tz)
                    setenv("TZ", tz, 1);
                else
                    unsetenv("TZ");
                tzset();
                return ret;
            }
 "

 The Boost.Chrono has its own implementation available as the
 internal_timegm() function, however the implementation is used only in
 very limited cases (currently Windows but not Cygwin env.) selected by the
 BOOST_CHRONO_INTERNAL_TIMEGM macrodefinition. The proposed patch enables
 the internal_timegm() also for Solaris/gcc.
 The issue concerns chrono in version 2 (BOOST_CHRONO_VERSION=2).

 The attached application reproduces the issue:

 $ g++ chrono_io_test_solaris.cpp -lboost_system -DBOOST_CHRONO_VERSION=2
 In file included from boost/chrono/chrono_io.hpp:26:0,
                  from chrono_io_test_solaris.cpp:1:
 boost/chrono/io/time_point_io.hpp: In function 'std::basic_istream<_CharT,
 _Traits>& boost::chrono::operator>>(std::basic_istream<_CharT, _Traits>&,
 boost::chrono::time_point<boost::chrono::system_clock, Duration>&)':
 boost/chrono/io/time_point_io.hpp:1003:27: error: there are no arguments
 to 'timegm' that depend on a template parameter, so a declaration of
 'timegm' must be available
 boost/chrono/io/time_point_io.hpp:1003:27: note: (if you use
 '-fpermissive', G++ will accept your code, but allowing the use of an
 undeclared name is deprecated)
 boost/chrono/io/time_point_io.hpp:1055:29: error: there are no arguments
 to 'timegm' that depend on a template parameter, so a declaration of
 'timegm' must be available
 $

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8696>
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