René Ferdinand Rivera Morell

Please review and merge this PR at your earliest convenience.

> @grafikrobot Do the modular changes come with an increase in memory usage? The only failure in the CI is OOM with UBSAN that I have not seen before. They...

> > > @grafikrobot Do the modular changes come with an increase in memory usage? The only failure in the CI is OOM with UBSAN that I have not seen...

Please review and merge this PR at your earliest convenience.

> I'm merging this as-is, but see [boostorg/system#132](https://github.com/boostorg/system/issues/132). Maybe we need to make this header-only as well. Probably.

Please review and merge this PR at your earliest convenience.

Please review and merge this PR at your earliest convenience.

Please review and merge this PR at your earliest convenience.

> You also remove some extra warning flags `cxxflags=-Wno-unused-parameter cxxflags=-Wno-uninitialized`, why? Those are for avoiding warnings in Math (IIRC) that cause errors because of the warnings-as-errors option.

@HDembinski > There seems to be an issue with boost.random in the slow tests, a linker error. Do you have an idea how to fix this? Have those slow tests...