rfolly

Header files for the facebook folly library.

Facebook Open Source Library (aka folly) is a C++ library similar to boost of fast and efficient library components. See here: https://github.com/facebook/folly

Many of the components are effectively header-only (with a little modification). These components include fbvector, small_vector, fbstring.

Modifications to source files

Source files are modified in the following way (recorded below for reproducibility):

folly-config.h manually configured rather than relying on the CMake script.
- #define FOLLY_HAVE_UNALIGNED_ACCESS 1
- #define FOLLY_HAVE_WEAK_SYMBOLS 0
- #define R_USE_JEMALLOC -- this config parameter should be defined in R's Makevars or configure script. See below
Append folly/portability/Malloc.cpp to the end of folly/portability/Malloc.h

Installation

Simple installation without jemalloc

devtools::install_github("traversc/rfolly")

Installation with jemalloc

rfolly is intended to be used with jemalloc, but requires a little bit of work. This is optional.

Step 1: remove previous installations of jemalloc. In Ubuntu:

sudo apt-get remove libjemalloc-dev
sudo apt-get remove libjemalloc2

Step 2: download, configure and install jemalloc.

You can download it from here: https://github.com/jemalloc/jemalloc/releases/download/5.2.1/jemalloc-5.2.1.tar.bz2

./configure --disable-initial-exec-tls
make
sudo make install

Step 3: install rfolly with configure args:

remotes::install_github("traversc/rfolly",configure.args="--with-jemalloc")

Things needed to get CRAN-ready

Get rid of cpp files and components that are not header only
Fix Pragmas (not allowed by R CMD check)
Sort out license
Figure out which components are available
Proper testing
Documentation, help files
???

If you'd like to collaborate, send me a message and/or pull request.