Re: firefox and rust build failure

[Robert Elz <kre%munnari.OZ.AU@localhost>]

    Date:        Tue, 7 Jul 2020 07:59:43 -0400 (EDT)
    From:        mlh%goathill.org@localhost (MLH)
    Message-ID:  <20200707115943.7E2BD12AB8%chopper.goathill.org@localhost>

  | error: process didn't exit successfully: `rustc -vV` (exit code: 2)
  | --- stderr
  | /bin/sh: Cannot execute ELF binary /usr/pkgnew/bin/rustc

That message indicates that sh was trying to run the binary as a
script, which means it has 'x' permission, but exec() on it failed.
It would be useful to know why.  Try running

	main()
	{
		execl("/usr/pkgnew/bin/rustc", "rustc", "-vV", (char *)0);
		perror("execl");
		return 1;
	}

(with whatever include files are needed to keep gcc happy), and see
what the exec failure is, that might provide a clue.

kre