[Scons-users] Setting environment variables for scons to use globally on my system

[Benjamin Lindley]

Is there any way to set environment variables for my system which scons 
will use, without me having to change the SConstruct file? For example, 
I would like to use MinGW instead of VC++ for my C++ builds on Windows. 
I can, of course, do this in my SConstruct file:


|env = Environment(tools = ['mingw'])

|


But if I do that, then I'm editing things into my build files that make 
it specific to my particular system configuration. That defeats the 
whole purpose of a portable build system, in my opinion. If I upload 
that as part of my repository for others to build, they may not be using 
MinGW. They may want to use VC++, or Clang, and I don't think they 
should have to modify the build file (or anything else in the repository 
for that matter) in order to build the program or library. Ideally, 
anyone with in an environment with a functional C++ toolchain and scons 
installed /should/ be able to just type |scons| on the command line, and 
things should go smoothly for them. Isn't that the (or a) goal of scons? 
Or am I misunderstanding its purpose?

Another thing is paths. The above line is not even enough, I have to 
still import the path to the MinGW binaries. I've read the justification 
for this. But it's just more system specific information which I have to 
put in my build files, which may be used by others where the chosen 
paths are not applicable.

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