Description of problem:

Compiler errors (well, I use -Werror) when compiling an application that uses boost.multiprecision.


Version-Release number of selected component (if applicable):
boost-1.60.0-5.fc24.x86_64

How reproducible:


Steps to Reproduce:
1. Compile anything that uses boost.multiprecision (like https://github.com/scylladb/scylla)
2. Watch it break.


Actual results:

/usr/include/boost/multiprecision/cpp_int.hpp:193:46: 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:416:46: 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:568:46: 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));
                                           ~~~^~~~~~~~~~~~~~~~~~



Expected results:

Clean compile.


Additional info:

Can be trivially fixed by casting 1u to limb_type.