Build conda package from a local C++ program - anaconda

Question

I am trying to build (and later upload) a conda package which would contain my custom program that I have developed in C++.
Simplifying the problem, I have a following meta.yaml:
package:
name: CoolName
version: "1.0.0"
source:
path: ./source
requirements:
build:
- make
and the following build.sh:
make
I have two questions here:
1) How and where should I copy the binary which is a result of the make compilation so that it is indeed recognized upon environment activation?
2) How should I specify g++ as a dependancy? I would like to have this package be later available for linux-64 and osx-64... In the building process (in the Makefile) I am using only g++.
Edit
I have modified my build script to have:
make
mkdir -p $PREFIX/bin
cp my_binary $PREFIX/bin/my_binary
And now the conda-build is successful. However, when I later try to install the package locally with conda install --use-local I get:
Collecting package metadata (current_repodata.json): done
Solving environment: done
# All requested packages already installed.
But this is not true, my binary is not installed anywhere and is not recognized...

Answer 1

How and where should I copy the binary which is a result of the make compilation so that it is indeed recognized upon environment activation?
As you mentioned in your edit, install somewhere within ${PREFIX}
How should I specify g++ as a dependancy?
To use conda-supplied compilers (rather than your system compiler), use this:
requirements:
build:
- {{ compiler('cxx') }}
I would like to have this package be later available for linux-64 and osx-64... In the building process (in the Makefile) I am using only g++.
Note: On Mac, it will use clang++, not g++. Make sure your Makefile respects the ${CXX} environment variable instead of hard-coding g++.
However, when I later try to install the package locally with conda install --use-local I get:
That is strange. conda install --use-local CoolName should do what you want. But here are some things to try:
Double-check the contents of the environment you're trying to install it into:
conda list
Try installing to a fresh environment:
conda create -n my-new-env --use-local CoolName
Delete any obsolete versions of the package you might have created before you successfully built the package:
# Inspect the packages you've created,
# and consider deleting all but the most recent one.
ls $(conda info --base)/conda-bld/linux-64/CoolName*.tar.bz2
...then try running conda install again.