id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
12181	Compile cpp_int fails in gcc6.1	Mario Lezcano <mariolez@…>	John Maddock	"[[Image()]]Using boost 1.60.0-4 and gcc 6.1.1.20160501, the following code
{{{#!c++
// gcc6.cpp
#include <boost/multiprecision/cpp_int.hpp>

int main(){
}
}}}
fails to compile with error
{{{#!c++
In file included from /usr/include/boost/config.hpp:61:0,
                 from /usr/include/boost/cstdint.hpp:36,
                 from /usr/include/boost/multiprecision/cpp_int.hpp:11,
                 from gcc6.cpp:1:
/usr/include/boost/multiprecision/cpp_int.hpp:193:4: error: right operand of shift expression ‘(1u << 63u)’ is >= than the precision of the left operand [-fpermissive]
    BOOST_STATIC_CONSTANT(limb_type, sign_bit_mask = 1u << (limb_bits - 1));
    ^
/usr/include/boost/multiprecision/cpp_int.hpp:416:4: error: right operand of shift expression ‘(1u << 63u)’ is >= than the precision of the left operand [-fpermissive]
    BOOST_STATIC_CONSTANT(limb_type, sign_bit_mask = 1u << (limb_bits - 1));
    ^
/usr/include/boost/multiprecision/cpp_int.hpp:568:4: error: right operand of shift expression ‘(1u << 63u)’ is >= than the precision of the left operand [-fpermissive]
    BOOST_STATIC_CONSTANT(limb_type, sign_bit_mask = 1u << (limb_bits - 1));
}}}
when compiled with
{{{
g++ gcc6.cpp
}}}
"	Bugs	closed	To Be Determined	multiprecision	Boost 1.60.0	Problem	fixed