consolidate the minimum compilation environment into a single file

When the shared library libhoge.so that you want to use for your own program is in Machine A but not in Machine B, even if the development environment is portable, it seems difficult to run the finished program in Machine B.Also, even if you put a specific version of the shared library in its USB memory to accommodate a machine that is not installed, it is likely that another machine already has another version of the shared library installed and does not work due to a different version.
(If you already have a vulnerable new version in your environment, but you have a vulnerable old version in your USB memory, you are not happy to use the old version.)

Even if there is an agenda (=carrying development environment), I feel that the program that can be created by it is only HelloWorld with minimal functionality.

To avoid worrying about these "running environmental differences", it's easy to "carry a set of development and running environments" = It's better to build a Linux OS on USB memory and run it on a virtual machine.

From a practical point of view, it is highly assumed that even if you try to use cheap USB memory like a hard disk, the reading and writing performance is too low to be practical.

In conclusion,

• Even if you can only carry your development environment in a portable way, it may not be practical
• Take development and execution environments with virtual machines
• If you want to do that, it would be less troublesome to put the development environment in the target machine