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

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)
[email protected] 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 <[email protected]>
>   | 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
> [email protected] 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://[email protected]/git/gcc.git


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

From c32b4598b980f1851d07fea9a20c8cb566c963a2 Mon Sep 17 00:00:00 2001
From: Andre Vehreschild <[email protected]>
Date: Fri, 13 Mar 2026 12:24:41 +0100
Subject: [PATCH] Fortran: Fix tests on aarch64-linux-gnu [PR124484]

gcc/testsuite/ChangeLog:

	PR Fortran/124484
	* gfortran.dg/coarray/caf.exp: Add -pthread and -lrt for
	aarch64-*-linux* targets for caf_shmem testing.
---
 gcc/testsuite/gfortran.dg/coarray/caf.exp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gfortran.dg/coarray/caf.exp b/gcc/testsuite/gfortran.dg/coarray/caf.exp
index 3db249a920f8..d975b5102553 100644
--- a/gcc/testsuite/gfortran.dg/coarray/caf.exp
+++ b/gcc/testsuite/gfortran.dg/coarray/caf.exp
@@ -123,7 +123,11 @@ foreach test [lsort [glob -nocomplain $srcdir/$subdir/*.\[fF\]{,90,95,03,08} ]]
             if { [istarget *-*-freebsd*] } {
                 dg-test $test "-fcoarray=lib -pthread $flags -lcaf_shmem" {}
             } else {
-                dg-test $test "-fcoarray=lib $flags -lcaf_shmem" {}
+                if { [istarget aarch64-*-linux*] } {
+                    dg-test $test "-fcoarray=lib -pthread -lrt $flags -lcaf_shmem" {}
+                } else {
+                    dg-test $test "-fcoarray=lib $flags -lcaf_shmem" {}
+                }
             }
             cleanup-modules ""
         }
-- 
2.53.0