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

[Zachary Turner via llvm-dev]

I'm not familiar with LNT, but I've written tests that set environment
variables before.

Just write your run line as:

RUN: env FOO=BAR cmd

On Fri, Nov 16, 2018 at 1:52 PM Troy Johnson via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Is there a better example of an LNTBased test than
> test-suite/LNTBased/Examples/Simple?  It doesn't actually compile or
> execute anything, so it's not really a useful example, but it does look
> like a TestModule would allow me to modify the env via Python.
>
> -Troy
>
> > -----Original Message-----
> > From: llvm-dev <llvm-dev-bounces at lists.llvm.org> On Behalf Of Troy
> Johnson
> > via llvm-dev
> > Sent: Friday, November 16, 2018 1:21 PM
> > To: chris.matthews at apple.com
> > Cc: llvm-dev at lists.llvm.org
> > Subject: Re: [llvm-dev] [LNT] How to set an env var before executing a
> test?
> >
> > 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
> > > > _______________________________________________
> > > > LLVM Developers mailing list
> > > > llvm-dev at lists.llvm.org
> > > > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
> >
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