To R 4.0.0 and Beyond!

• Re-wrote the installer package to focus on R 4.0.0 requirements.
  • Downloads and installs Xcode CLI
  • Downloads and installs appropriate gfortran binary
  • Backup and remove existing ~/.R/Makevars and ~/.Renviron configuration files.

R 3.6.z: More robust headless Xcode CLI Installation Support on Catalina

• Xcode CLI headless installation for macOS Catalina was made more robust (#33).
• Improved code formatting in postinstall script.
• Better documented alignment of GitHub issues with changes in the ChangeLog.

R 3.6.z: SHLIB flag for CXX14 applications

• Provide a C++14 specific SHLIB_CXX14LDFLAGS to address issues arising with Stan.

R 3.6.z: Configuration file fixes

• Fix issue where either ~/.R/Makevars or ~/.Renviron were owned by root instead of the user. (reported in #28 by @Ptterz!)
• Change README.md and package installer splash screen to be explicit with what happens to pre-existing ~/.R/Makevars and ~/.Renviron. (reported in #27 by @joranE)

R 3.6.z: Improved Compilation Support

• Add CXXFLAGS in ~/.R/Makevars for better support prior to R 3.6.1
• Add SHLIB_CXXLDFLAGS in ~/.R/Makevars to link to the R ABI
  libraries instead of system. (h/t Sebastian from the Stan Project).
• Update detection scheme for headless Xcode CLI download and installation for macOS Catalina.
• Improved installer event logging.
• Update README.md details on components and URLs.

R 3.6.z: Configuration changes

• Use ~/.Renviron to setup a PATH variable to compiler.
• Deploy *FLAGS in ~/.R/Makevars to successfully handle the Xcode CLI changeover
• Depend on the CRAN variants for installer packages
• Add in a statement to reset the Xcode CLI environment.

R 3.4.z: Update component downloads

• Added md5 hash check to verify downloaded contents (#8)
• Changed download links to point to projects GitHub Release Page (#1)

R 3.4.z: toolchain installer for compiled code on macOS

Features

• Signed GUI Installer for OS X El Capitan 10.11 - macOS High Sierra 10.13 that establishes the compilation toolchain for R.
• Detects, downloads, and installs the appropriate Xcode CLI and gfortran installers for supported macOS systems.
• Downloads and installs the clang4 CRAN binary.
• Sets the proper paths for CC, CXX, CXX**, FLIBS, and LDFLAGS in the ~/.R/Makevars file.
• Financial support was provided to sign the installer by Professor Timothy Bates of the University of Edinburgh.