Re: [PATCH] Run gdb.compile/*.exp on {x86,x86_64,s390}-linux only

[Phil Muldoon <pmuldoon@redhat.com>]

On 16/01/18 15:14, Yao Qi wrote:
> Pedro Alves <palves@redhat.com> writes:
>
> People need to implement these "compile" related gdbarch methods to
> support this feature.  Also, we also need to "port" it to the distro
> other than Fedora/RHEL, I've never get it working on Ubuntu.

What were the problems? I don't work on the compile project any more
but AFAIK we made it distro neutral.

> searching for compiler matching regex ^aarch64(-[^-]*)?-linux(-gnu)?-gcc$^M
> found compiler /home/yaoqi01/fsf-trunk-build/build-native-aarch64-none-linux-gnu/install/sysroot/usr/bin/aarch64-none-linux-gnu-gcc^M
> Passing 11 compiler options:^M
> Compiler option 0: <>^M
> Compiler option 1: <-std=gnu11>^M
> Compiler option 2: <-fno-exceptions>^M
> Compiler option 3: <-O0>^M
> Compiler option 4: <-gdwarf-4>^M
> Compiler option 5: <-fPIE>^M
> Compiler option 6: <-Wall>^M
> Compiler option 7: <-Wno-implicit-function-declaration>^M
> Compiler option 8: <-Wno-unused-but-set-variable>^M
> Compiler option 9: <-Wno-unused-variable>^M
> Compiler option 10: <-fno-stack-protector>^M
> source file produced: /tmp/gdbobj-6vzbkt/out3.c^M
> ^M
> aarch64-none-linux-gnu-gcc: error: : No such file or directory

The only thing I can think of is either path or ld_library_path is not
set or not installed in those locations.

>>> I think we need to properly skip tests on targets which don't support
>>> compile.  As far as I know, gdb compile is supported on x86, x86_64,
>>> and s390.

However, I see no problem with a whitelist, even if it is disliked.

> See my post above.  The issue isn't as simple as "having -m64
> in target options".  It is known that compile feature works on
> x86/fedora, and my dest is aarch64/ubuntu.  The gap is not small.
> Probably, it can be broke into two steps, x86/fedora -> x86/ubuntu ->
> aarch64/ubuntu, or x86/fedora -> aarch64/fedora -> aarch64/ubuntu.
 
> I am in a stage that triage all test fails on aarch64 and arm with
> recent gcc, and I don't have an immediate plan to support compile on
> aarch64-linux and arm-linux.

I don't think I've ever tried it on arm. I think, if memory serves,
that Tom tried it on a Debian setup. Still, it *should* work.

Cheers

Phil