Use pkg-config to find kim-api-v2 library settings

# The KIM API package can be downloaded from https://openkim.org/kim-api

# Follow the instructions in the INSTALL file to build and install the

# KIM API.  Add the openkim.org Models you are interested in using.

# Make sure the directory where the "kim-api-build-conifg" utility is

# located is on the PATH.

#

# As long as you have followed the KIM API build and install instructions,

# there should not be any reason to change this file.

# Settings that the LAMMPS build will import when this package is installed

include ../../lib/kim/Makefile.KIM_DIR

ifeq ($(wildcard $(KIM_INSTALL_DIR)/bin/kim-api-v2-build-config),)

  KIM_CONFIG_HELPER = kim-api-v2-build-config

else

  KIM_CONFIG_HELPER = $(KIM_INSTALL_DIR)/bin/kim-api-v2-build-config

endif

ifeq ($(shell $(KIM_CONFIG_HELPER) --version 2> /dev/null),)

  $(error $(KIM_CONFIG_HELPER) utility is not available.  Something is wrong with your KIM API package setup)

endif

kim_SYSINC  = $(shell $(KIM_CONFIG_HELPER) --includes)

kim_SYSLIB  = $(shell $(KIM_CONFIG_HELPER) --ldlibs)

kim_SYSPATH = $(shell $(KIM_CONFIG_HELPER) --ldflags)

kim_SYSINC  = $(shell pkg-config --cflags libkim-api-v2)

kim_SYSLIB  = $(shell pkg-config --libs   libkim-api-v2)