[LOC2] Integrate ELF-based LOC-encoding scheme. Add tests/docs. Fix `make help` messages. #60

	on:
	push:
	branches: [ "main" ]
	pull_request:
	branches: [ "main" ]

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python 3.10
	uses: actions/setup-python@v3
	with:
	python-version: "3.10"
	#! python-app.yml actually runs Py-tests. But test.sh also invokes
	#! them (by default; some duplication). So install reqd s/w up front.
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pytest

	#! - name: configure
	#! run: ./configure

	#! Ensure that standalone target still works on its own
	- name: genloc
	run: make genloc

	- name: clean
	run: make clean

	- name: make-all-verbose
	run: CC=gcc LD=g++ BUILD_VERBOSE=1 make

	#! Execute testing targets; Run py-test and LOC-enabled sample programs
	- name: make-tests
	run: \|
	make clean
	CC=gcc LD=g++ make run-tests

	#! Execute testing targets; Run py-test and LOC-enabled sample programs
	- name: test-make-with-external-cflags
	run: \|
	make clean
	CC=gcc LD=g++ CFLAGS='-DLOC_FILE_INDEX=LOC_$(subst .,_,$(subst -,_,$(notdir $<)))' make -f Makefile.ext-CFLAGS run-tests

	#! Same as above, but just feed the CFLAGS emitted by Py-generator.
	- name: test-make-with-py-gen-emitted-cflags
	run: \|
	make clean
	CC=gcc LD=g++ CFLAGS=$(./loc/gen_loc_files.py --src-root-dir ./test-code/single-file-cc-program --gen-cflags-brief) make -f Makefile.ext-CFLAGS run-tests

	#! - name: Run check
	#! run: make check

	#! - name: Run distcheck
	#! run: make distcheck

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