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Re: Simulator question about argc/argv

From: nick clifton <nickc at redhat dot com>
To: Steve Ellcey <sellcey at mips dot com>, gdb at gcc dot gnu dot org
Date: Mon, 03 Jun 2013 12:19:32 +0100
Subject: Re: Simulator question about argc/argv
References: <e51642e8-9972-421d-be36-5bcaec133fe3 at BAMAIL02 dot ba dot imgtec dot org>

Hi Steve,

Some new tests have been added to the GCC testsuite (cilk tests) that
check the value of argc and they expect it to be 1 if there are no
arguments to the test program (and there are none) but I am getting 0
when I run the tests under the gnu simulator.  Does anyone know why
this is?

Yes - many simulators do not support passing any arguments to theprogram that they are simulating. So they set argc to zero when theyinvoke main. (They usually also set argv to NULL and envp to NULL).

Tests that depend upon a non-zero argc value are, IMHO, dubious. Testsshould be able to be run in an automated fashion without anything beingprovided to them via the command line or their environment.


Cheers
  Nick

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