Makevars

# --------
# RMakevars
# --------

# General note
# - need to repeat options across C++ flavors (e.g., 11, 14)

# Homebrew bin / opt / lib locations

## Add the full path to have everything on here. 
export PATH=/opt/homebrew/opt/llvm/bin:/opt/homebrew/opt/ruby/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Library/TeX/texbin:/usr/local/MacGPG2/bin:/usr/local/munki:/opt/X11/bin:/Library/Apple/usr/bin:/Users/luis.puerto/Code/golang/bin:/opt/homebrew/opt/go/libexec/bin:/opt/homebrew/opt/ccache/libexec

## Figure out the Homebrew path
BP=`brew --prefix`

HB=$(BP)/bin
HO=$(BP)/opt
HL=$(BP)/lib
HI=$(BP)/include

# MacOS 10.14.6 Xcode header location (August 2019)
# (do "xcrun -show-sdk-path" in terminal to get path; change if yours is different)
XH=$(shell xcrun -show-sdk-path)

# ccache
CCACHE=$(HB)/ccache

# Make using all cores (set # to # of cores on your machine)
# Check https://stackoverflow.com/q/2499070 for more info. 
# Run `nproc` to check the number of threads https://stackoverflow.com/a/56607839
# As a rule of thumb the number should be between cores and threads. 
MAKE=make -j4

# GNU version (May 2021)
GNU_VER=11

# LLVM (Clang) compiler options
CC=$(CCACHE) $(HO)/llvm/bin/clang
CXX=$(CC)++
CXX98=$(CC)++
CXX11=$(CC)++
CXX14=$(CC)++
CXX17=$(CC)++

# FORTRAN
FC=$(CCACHE) $(HB)/gfortran-$(GNU_VER)
F77=$(FC)
FLIBS=-L$(HL)/gcc/$(GNU_VER) -lgfortran -lquadmath -lm

# STD libraries
CXX1XSTD=-std=c++0x
CXX11STD=-std=c++11
CXX14STD=-std=c++14
CXX17STD=-std=c++17

# FLAGS
STD_FLAGS=-g -O3 -Wall -pedantic -mtune=native -pipe
CFLAGS=$(STD_FLAGS)
CXXFLAGS=$(STD_FLAGS)
CXX98FLAGS=$(STD_FLAGS)
CXX11FLAGS=$(STD_FLAGS)
CXX14FLAGS=$(STD_FLAGS)
CXX17FLAGS=$(STD_FLAGS)

# Preprocessor FLAGS
# NB: -isysroot refigures the include path to the Xcode SDK we set above
CPPFLAGS=-isysroot $(XH) -I$(HI) \
  -I$(HO)/llvm/include -I$(HO)/openssl/include \
  -I$(HO)/gettext/include -I$(HO)/tcl-tk/include

# Linker flags (suggested by homebrew)
LDFLAGS+=-L$(HO)/llvm/lib -Wl,-rpath,$(HO)/llvm/lib

# Flags for OpenMP support that should allow packages that want to use
# OpenMP to do so (data.table), and other packages that bork with
# -fopenmp flag (stringi) to be left alone
SHLIB_OPENMP_CFLAGS=-fopenmp
SHLIB_OPENMP_CXXFLAGS=-fopenmp
SHLIB_OPENMP_CXX98FLAGS=-fopenmp
SHLIB_OPENMP_CXX11FLAGS=-fopenmp
SHLIB_OPENMP_CXX14FLAGS=-fopenmp
SHLIB_OPENMP_CXX17FLAGS=-fopenmp
SHLIB_OPENMP_FCFLAGS=-fopenmp
SHLIB_OPENMP_FFLAGS=-fopenmp