R
R is a programming language primarily for statistics and numerical analysis.
Installation
USE flags
USE flags for dev-lang/R Language and environment for statistical computing and graphics
+libdeflate
|
Use app-arch/libdeflate rather than sys-libs/zlib for lazy-loaded R objects. |
X
|
Add support for X11 |
cairo
|
Enable support for the cairo graphics library |
doc
|
Add extra documentation (API, Javadoc, etc). It is recommended to enable per package instead of globally |
icu
|
Enable ICU (Internationalization Components for Unicode) support, using dev-libs/icu |
java
|
Add support for Java |
jpeg
|
Add JPEG image support |
lapack
|
Add support for the virtual/lapack numerical library |
lto
|
Enable Link-Time Optimization (LTO) to optimize the build |
minimal
|
Install a very minimal build (disables, for example, plugins, fonts, most drivers, non-critical features) |
nls
|
Add Native Language Support (using gettext - GNU locale utilities) |
openmp
|
Build support for the OpenMP (support parallel computing), requires >=sys-devel/gcc-4.2 built with USE="openmp" |
perl
|
Add optional support/bindings for the Perl language |
png
|
Add support for libpng (PNG images) |
prefix
|
Defines if a Gentoo Prefix offset installation is used |
profile
|
Add support for software performance analysis (will likely vary from ebuild to ebuild) |
readline
|
Enable support for libreadline, a GNU line-editing library that almost everyone wants |
test
|
Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently) |
tiff
|
Add support for the TIFF image format |
tk
|
Add support for Tk GUI toolkit |
Emerge
root #emerge --ask dev-lang/RConfiguration
Compile flags for install.packages
At compile time, R remembers the CFLAGS and CXXFLAGS with which it was configured, storing them in $R_HOME/etc/Makeconf. However, certain CRAN packages may fail to compile with said flags, even if R itself compiled smoothly.
To rectify this, either change R's flags via /etc/portage/package.env, or work with the experimental R overlay.
Example: Removing LTO
Suppose that an attempt to install ggplot2 via install.packages("ggplot2") caused a compile time error due to -Werror=strict-aliasing, which is associated with LTO. To rectify this, use an env to demote this error to a warning. Since this warning often indicates LTO runtime issues, consider disabling lto as well.
/etc/portage/env/no-ltoRemoving LTO# These warnings were promoted to errors as they indicate likely runtime
# problems with LTO. Additively disable them since LTO is being removed.
WARNING_FLAGS="-Wno-error=odr -Wno-error=lto-type-mismatch -Wno-error=strict-aliasing"
CFLAGS="${CFLAGS} -fno-lto"
CXXFLAGS="${CXXFLAGS} -fno-lto"
FCFLAGS="${FCFLAGS} -fno-lto"
FFLAGS="${FFLAGS} -fno-lto"
USE="${USE} -lto"
/etc/portage/package.env/RRemoving LTOdev-lang/R no-lto
Reemerge R to propagate these changes.
root #emerge --ask dev-lang/RIntegration with other programs
ESS, or Emacs Speaks Statistics, is an Emacs mode that can edit R files and start R from within Emacs. To install:
root #emerge --ask app-emacs/essIn Vim, the vim-r plugin integrates vim and R through tmux and provides support for editing R and send it to an R process. To install:
root #emerge --ask app-vim/vim-r