[llvm-dev] Environment variables

[David Greene via llvm-dev]

Is there an LLVM-ish way to handle environment variables?  Specifically,
I want to check existence and/or value of an environment variable and
take appropriate action.

I was kind of surprised that LLVM doesn't seem to have any
special/optimized way to deal with environment variables.  The one
Stackoverflow I found on it suggested using getenv().

Thanks!

                  -David