[Fortran, PR124484, v1] Fix testing caf_shmem on aarch64-*-linux was: [Linaro-TCWG-CI] gcc-16-7727-gaa09298cb017: 157 regressions on aarch64

[Andre Vehreschild]

Hi Adhemerval,

well, at least on the compile farm host cfarm185 available to me that fixed the
issue. Do you have examples where it doesn't?

- Andre 

On Fri, 20 Mar 2026 14:39:20 -0300
Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> wrote:

> Hi Andre,
> 
> The aarch64-linux-gnu target should not be different than x86_64 in this
> regard and the buildbots uses a recent glibc where -pthread and -lrt are
> just stub libraries (all symbol are on libc.so). Are you sure this the
> cause of the isssue?
> 
> On 13/03/26 09:45, Andre Vehreschild wrote:
> > Hi all,
> > 
> > the linaro CI reported test errors for aarch64 targets. I figured that for
> > aarch64 on linux the compile flags -pthread and -lrt are needed to link
> > caf_shmem and produce an executable. The attached patch addresses this by
> > special case for aarch64-*-linux* similiar to freebsd.
> > 
> > Regtested ok on aarch64-unknown-linux-gnu (cfarm185) and x86_64-linux-gnu /
> > F43. Ok for master?
> > 
> > Regards,
> > 	Andre
> > 
> > On Thu, 12 Mar 2026 04:46:24 +0000 (UTC)
> > ci_notify@linaro.org wrote:
> >   
> >> Dear contributor,
> >>
> >> Our automatic CI has detected problems related to your patch(es). Please
> >> find some details below.
> >>
> >> In  master-aarch64, after:
> >>   | commit gcc-16-7727-gaa09298cb017
> >>   | Author: Andre Vehreschild <vehre@gcc.gnu.org>
> >>   | Date:   Wed Jun 18 09:26:22 2025 +0200
> >>   | 
> >>   |     Fortran: Enable coarray tests for multi image use [PR88076]
> >>   |     
> >>   |     Change some of regression tests to run on single and multiple
> >> images. |     Add some new tests.
> >>   |     
> >>   | ... 29 lines of the commit log omitted.
> >>
> >> Produces 157 regressions:
> >>   | 
> >>   | regressions.sum:
> >>   | Running gfortran:gfortran.dg/coarray/caf.exp ...
> >>   | FAIL: gfortran.dg/coarray/alloc_comp_1.f90 -fcoarray=lib  -O2
> >> -lcaf_shmem (test for excess errors) | UNRESOLVED:
> >> gfortran.dg/coarray/alloc_comp_1.f90 -fcoarray=lib  -O2  -lcaf_shmem
> >> compilation failed to produce executable | FAIL:
> >> gfortran.dg/coarray/alloc_comp_10.f90 -fcoarray=lib  -O2  -lcaf_shmem (test
> >> for excess errors) | UNRESOLVED: gfortran.dg/coarray/alloc_comp_10.f90
> >> -fcoarray=lib  -O2  -lcaf_shmem compilation failed to produce executable |
> >> ... and 153 more
> >>
> >> Used configuration :
> >>  *CI config* tcwg_gnu_cross_check_gcc master-aarch64
> >>  *configure and test flags:* --target aarch64-linux-gnu 
> >>
> >> We track this bug report under
> >> https://linaro.atlassian.net/browse/GNU-1860. Please let us know if you
> >> have a fix.
> >>
> >> If you have any questions regarding this report, please ask on
> >> linaro-toolchain@lists.linaro.org mailing list.
> >>
> >> -----------------8<--------------------------8<--------------------------8<--------------------------
> >>
> >> The information below contains the details of the failures, and the ways to
> >> reproduce a debug environment:
> >>
> >> You can find the failure logs in *.log.1.xz files in
> >>  *
> >> https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-aarch64-build/2614/artifact/artifacts/00-sumfiles/
> >> The full lists of regressions and improvements as well as configure and
> >> make commands are in
> >>  *
> >> https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-aarch64-build/2614/artifact/artifacts/notify/
> >> The list of [ignored] baseline and flaky failures are in
> >>  *
> >> https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-aarch64-build/2614/artifact/artifacts/sumfiles/xfails.xfail
> >>
> >> Current build   :
> >> https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-aarch64-build/2614/artifact/artifacts
> >> Reference build :
> >> https://ci.linaro.org/job/tcwg_gnu_cross_check_gcc--master-aarch64-build/2613/artifact/artifacts
> >>
> >> Instruction to reproduce the build :
> >> https://gitlab.com/LinaroLtd/tcwg/ci/interesting-commits/-/raw/master/gcc/sha1/aa09298cb017ff8c3224166b33204662174822df/tcwg_gnu_cross_check_gcc/master-aarch64/reproduction_instructions.txt
> >>
> >> Full commit : See in git+ssh://linaroci@gcc.gnu.org/git/gcc.git  
> > 
> >   
> 


-- 
Andre Vehreschild * Email: vehre ad gmx dot de