# compilers, may be passed to make
CC++ = g++
FCOMP = gfortran

# version of program, may be passed to make
ver = debug

# manually assign linux distro
OS=CentOS-7.7

# collect name information
ARCH := $(shell uname -m)
KERN := $(shell uname -r | cut -d. -f 1,2)

# find g++ compiler version
# this can vary with the distribution
CMP := $(shell g++ --version | cut -d ' ' -f 3 | sed q)

# create names for build directory name
CNAME := gpp-$(CMP)
FNAME := gfortran-$(CMP)

# archdir is executed as part of all and will create the necessary
# version specific directories if they do not exist
archdir: ${BDIR}

# concatenate the name for the build directory
BDIR := bld_$(OS)_$(KERN).$(ARCH)_$(CNAME)_$(FNAME)_$(ver)
# mkdir if the directories do not exist
${BDIR}:
    @mkdir -p ${BDIR}

# archdir is part of all
all archdir program_name

# archdir is executed as part of all and will create the necessary
# version specific directories if they do not exist
archdir: ${BDIR}  ${TESTDIR}

# create name for the build directory
BDIR := bld_$(OS)_$(KERN).$(ARCH)_$(CNAME)_$(FNAME)_$(ver)
# mkdir if the directories do not exist
${BDIR}:
    @mkdir -p ${BDIR}

# create name for test directory
TESTDIR = ./test/(OS)_$(KERN).$(ARCH)_$(CNAME)_$(FNAME)_$(ver)
# mkdir if the directory does not exist
${TESTDIR}:
    @mkdir -p ${TESTDIR}