https://github.com/JuliaMath/IntegerMathUtils.jl/pull/3/files#diff-28602f93a5d315a5d6dfd2d013de41a6b0bcbd3ed01c7ca21dca919edc4b78fbR13 seems to have broken this package on Julia v1.0, since the macro `@ccall` is not defined. Perhaps the support for v1.0 should be dropped if it isn't supported.