C and C++ compilers are replaced by `scan-build clang`, and restored afterwards. Other flags and anything else in `~/.R/Makevars` is left alone.
jw_scan_build(path = ".", clang = "clang-8",
scan_build = "scan-build")
Path to package root, default is "."
.
Path or name of clang compiler executable. Currently `clang-8` which is what MacOS homebrew currently (early 2019) provides.
Path or name of scan-build executable. Current `scan-build`, also from MacOS Homebrew. On linux, this has the LLVM version suffix, e.g., `scan-build-8`.