id,summary,reporter,owner,description,type,status,milestone,component,version,severity,resolution,keywords,cc
6118,Uuid random_generator compiles with warnings by GCC,Vasily Sukhanov <basil@…>,Andy Tompkins,"uuids::random_generator constructor emits warning when compiled with GCC:
>g++ -O2 -Wall -Werror uuidTest.cpp[[BR]]

On Linux x86_64, gcc 4.5.2 output is

/home/vasily/boost_1_47_0/boost/uuid/seed_rng.hpp: In member function ‘void boost::uuids::detail::seed_rng::sha1_random_digest_()’:
/home/vasily/boost_1_47_0/boost/uuid/seed_rng.hpp:152:53: error: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result

Cross gcc 4.5.3 (Linux -> Solaris) and gcc 4.6.1 (Linux -> AIX) produce 

In file included from testBoostUuid.cpp:3:0:
/emc/sukhav/cross/boost_1_47_0/boost/uuid/seed_rng.hpp: In constructor ‘boost::uuids::basic_random_generator<UniformRandomNumberGenerator>::basic_random_generator() [with UniformRandomNumberGenerator = boost::random::mersenne_twister_engine<unsigned int, 32ul, 624ul, 397ul, 31ul, 2567483615u, 11ul, 4294967295u, 7ul, 2636928640u, 15ul, 4022730752u, 18ul, 1812433253u>]’:
/emc/sukhav/cross/boost_1_47_0/boost/uuid/seed_rng.hpp:243:34: error: ‘end.boost::uuids::detail::generator_iterator<boost::uuids::detail::seed_rng>::m_value’ may be used uninitialized in this function [-Werror=uninitialized]

Latter warning is regression. Compilation passes with boost 1.46.1. Probably, it's caused by some changes in Random library.",Bugs,closed,To Be Determined,uuid,Boost 1.47.0,Problem,fixed,warning gcc,jonathan.jones@…