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Setting environment variables when doing remove execution

From: Tobias Burnus
Subject: Setting environment variables when doing remove execution
Date: Mon, 25 Nov 2019 16:33:04 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2

Hi all,

the following is motivated by GCC testsuite – which uses 'dg-set-target-env-var' to set per-test-case environment variables (used with the address-sanitizer (ASAN) and in the testsuite for OpenMP/OpenACC (libgomp)). [The latter also uses 'setenv' for offloading for all runs per offloading target.] – GCC uses 'setenv' for this purpose, which works well if host = target (= ![is_remote…]) – but when doing remote execution, it does not work.

The question is how to best support setting the environment variable remote. I could imagine to either pass environment variables alongside when running remote_spawn/remote_exec or to have a remove_setenv.




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