Re: [PATCH 1/5] x86_64: Add support for bcmp using sse2, sse 4_1, avx2, and evex

[Noah Goldstein via Libc-alpha <libc-alpha@sourceware.org>]

On Mon, Sep 27, 2021 at 2:29 AM Florian Weimer <fweimer@redhat.com> wrote:

> * Noah Goldstein:
>
> > Is there some documentation for how to effectively use
> build-many-glibcs.py
> >
> > I've tried:
> >
> > $> python3 src/glibc/scripts/build-many-glibcs.py /some/were checkout
> gcc-vcs-11
>
> (gcc-vcs-11 is actually the current default.)
>
> > $> python3 src/glibc/scripts/build-many-glibcs.py /some/were
> host-libraries
> > $> python3 src/glibc/scripts/build-many-glibcs.py /some/were compilers
> > $> python3 src/glibc/scripts/build-many-glibcs.py /some/were glibcs
> >
> > With GLIBC master I'm seeing a ton of failures so I'm not sure how I'm
> > supposed to actually test my patches.
>
> Running build-many-glibcs.py is not a requirement for patch submission.
> (One run that completes in a somewhat reasonable amount of time costs
> 10 USD to 20 USD in the public cloud, after all.)
>
> I just tried a run, and it passes for me without errors.  Joseph's
> tester also produces clean reports for GCC 11.
>
> Which errors do you encounter?  For investigation, it may be prudent to
> build with “--keep failed”.  Logs are always preserved.  For the Linux
> targets, they can be found in logs/glibcs/…/004*.log.txt for the build
> phase, and logs/glibcs/…/007*.log.txt for the check phase.
>
> Common sources of errors are lack of disk space or memory.  I think
> below 1 GiB RAM per core, it gets a bit tight, and you may have to
> reduce parallelism using -j.
>

So I essentially get an error at the first build step in compilers (same
for any target)

i.e

FAIL: compilers-arc-linux-gnu binutils build

Looking inside the log I see:

```
/some/were/src/binutils/gas/as.c:110:31: error:
‘DEFAULT_GENERATE_ELF_STT_COMMON’ undeclared here (not in a function)
  110 | int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON;
      |                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/some/were/src/binutils/gas/as.c:111:34: error:
‘DEFAULT_GENERATE_BUILD_NOTES’ undeclared here (not in a function)
  111 | bool flag_generate_build_notes = DEFAULT_GENERATE_BUILD_NOTES;
      |                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/some/were/src/binutils/gas/as.c: In function ‘print_version_id’:
/some/were/src/binutils/gas/as.c:237:21: error: ‘TARGET_ALIAS’ undeclared
(first use in this function); did you mean ‘TARGET_ARCH’?
  237 |            VERSION, TARGET_ALIAS, BFD_VERSION_STRING);
      |                     ^~~~~~~~~~~~
      |                     TARGET_ARCH
/some/were/src/binutils/gas/as.c:237:21: note: each undeclared identifier
is reported only once for each function it appears in
/some/were/src/binutils/gas/as.c: In function ‘parse_args’:
/some/were/src/binutils/gas/as.c:700:19: error: ‘TARGET_ALIAS’ undeclared
(first use in this function); did you mean ‘TARGET_ARCH’?
  700 |                   TARGET_ALIAS);
      |                   ^~~~~~~~~~~~
      |                   TARGET_ARCH
/some/were/src/binutils/gas/as.c:715:51: error: ‘TARGET_CANONICAL’
undeclared (first use in this function)
  715 |           fprintf (stderr, _("canonical = %s\n"), TARGET_CANONICAL);
      |                                                   ^~~~~~~~~~~~~~~~
/some/were/src/binutils/gas/as.c:716:50: error: ‘TARGET_CPU’ undeclared
(first use in this function)
  716 |           fprintf (stderr, _("cpu-type = %s\n"), TARGET_CPU);
      |                                                  ^~~~~~~~~~
make[5]: *** [Makefile:1238: as.o] Error 1
make[5]: Leaving directory
'/some/were/build/compilers/arc-linux-gnu/binutils/gas'
make[4]: *** [Makefile:1283: all-recursive] Error 1
make[3]: *** [Makefile:819: all] Error 2
make[2]: *** [Makefile:4990: all-gas] Error 2
make[1]: *** [Makefile:903: all] Error 2

FAIL: compilers-arc-linux-gnu binutils build
```

All the ensuing GLIBC builds result in UNRESOLVED i.e:

UNRESOLVED: glibcs-x86_64-linux-gnu build

```
Description: glibcs-x86_64-linux-gnu build
Command: make
Directory: /some/were/build/glibcs/x86_64-linux-gnu/glibc
Path addition: /some/were/install/compilers/x86_64-linux-gnu/bin


UNRESOLVED: glibcs-x86_64-linux-gnu build
```


> Thanks,
> Florian
>
>