[llvm-dev] [LNT] How to set an env var before executing a test?

[Troy Johnson via llvm-dev]

So you're referring to llvm_test_prepare?  There aren't many examples of that being used.  I tried adding a call to it in my test directory's CMakeLists.txt like so:

llvm_test_prepare(WORKDIR ${CMAKE_CURRENT_BINARY_DIR}
  export MY_VAR=42
)

In the hopes that something would happen, even an error, but it had no effect.  Nothing at http://llvm.org/docs/lnt/tests.html explains how to use these cmake macros, so I'm looking at test-suite/External/SPEC/CINT2000/175.vpr/CMakeLists.txt for an example.  The tests that I have added are under a subdirectory of test-suite/SingleSource, but the comment at the top of test-suite/cmake/modules/SingleMultiSource.cmake has me worried that nothing new is supposed to go in there.  Maybe I should move everything under test-suite/External and more closely mimic these SPEC CMakeLists.txt?

-Troy

> -----Original Message-----
> From: chris.matthews at apple.com <chris.matthews at apple.com>
> Sent: Friday, November 16, 2018 12:26 PM
> To: Troy Johnson <troyj at cray.com>
> Cc: llvm-dev at lists.llvm.org
> Subject: Re: [llvm-dev] [LNT] How to set an env var before executing a test?
> 
> It does not. The prefers way to customize is to use a cmake define.
> 
> Briefly, LNT is first running cmake, then make to build the tests. Then running Lit
> to execute them and collect the performance data.
> 
> I believe via cmake there are ways to change both the test builds and execution.
> 
> > On Nov 16, 2018, at 9:20 AM, Troy Johnson via llvm-dev <llvm-
> dev at lists.llvm.org> wrote:
> >
> > Does the LNT test-suite provide a way to have an environment variable set
> when executing a test?  I can set it outside of LNT (i.e. have it in my environment
> when LNT is launched) and that works fine, but there does not appear to be a
> way to set it as part of a test’s configuration.  There are some lit.local.cfg files
> scattered throughout the test-suite repository, but messing with os.environ in
> those seems to have no effect (and I’m not quite sure what LNT is doing with LIT
> configs anyway).
> >
> > -Troy
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