introduce target tmpnam and require it in tests relying on it

[Bernhard Reutner-Fischer]

On 24 April 2020 11:59:50 CEST, Alexandre Oliva <oliva@adacore.com> wrote:
>On Apr 23, 2020, Martin Sebor <msebor@gmail.com> wrote:
>
>> Sure.  I'd go with _fileio but that's just a suggestion.
>
>Okiedokie, here's the patch using fileio instead of tmpnam for the
>effective target name.  I'm going to check it in shortly.
>
>
>introduce target fileio and require it in tests that use tmpnam

ISTM the corresponding documentation hunk for sourcebuild.texi  is missing.
TIA,
>
>Some target C libraries that aren't recognized as freestanding don't
>have filesystem support, so calling tmpnam, fopen/open and
>remove/unlink fails to link.
>
>This patch introduces a fileio effective target to the testsuite, and
>requires it in the tests that call tmpnam.
>
>
>for  gcc/testsuite/ChangeLog
>
>	* lib/target-supports.exp (check_effective_target_fileio): New.
>	* gcc.c-torture/execute/fprintf-2.c: Require it.
>	* gcc.c-torture/execute/printf-2.c: Likewise.
>	* gcc.c-torture/execute/user-printf.c: Likewise.
>---
> gcc/testsuite/gcc.c-torture/execute/fprintf-2.c   |    1 +
> gcc/testsuite/gcc.c-torture/execute/printf-2.c    |    1 +
> gcc/testsuite/gcc.c-torture/execute/user-printf.c |    1 +
> gcc/testsuite/lib/target-supports.exp             |   13 +++++++++++++
> 4 files changed, 16 insertions(+)