[gcc r16-7222] testsuite: riscv: valgrind: tolerate unhandled syscall

[Alexandre Oliva]

https://gcc.gnu.org/g:f91195ac7b2d62f0dc04bdefd1da641349e1531c

commit r16-7222-gf91195ac7b2d62f0dc04bdefd1da641349e1531c
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Sun Feb 1 04:35:16 2026 -0300

    testsuite: riscv: valgrind: tolerate unhandled syscall
    
    When running a riscv(32|64)-elf-targeting compiler on a
    x86_64-linux-gnu with valgrind-3.18.1, it prints a multi-line warning
    about an unhandled syscall, but the test works if we ignore those
    lines to avoid an excess errors failure.
    
    I've thus arranged for relevant pieces of the valgrind warning to be
    pruned.
    
    
    for  gcc/testsuite/ChangeLog
    
            * gcc.target/riscv/pr122215.c: Prune valgrind unhandled
            syscall multi-line warning.

Diff:
---
 gcc/testsuite/gcc.target/riscv/pr122215.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/testsuite/gcc.target/riscv/pr122215.c b/gcc/testsuite/gcc.target/riscv/pr122215.c
index cdc1ed7c4e74..444d9d42a602 100644
--- a/gcc/testsuite/gcc.target/riscv/pr122215.c
+++ b/gcc/testsuite/gcc.target/riscv/pr122215.c
@@ -2,6 +2,7 @@
 /* { dg-require-effective-target valgrind } */
 /* { dg-additional-files "sparseset.supp" } */
 /* { dg-options "-wrapper valgrind,-q,--exit-on-first-error=yes,--error-exitcode=1,--suppressions=${srcdir}/sparseset.supp" } */
+/* { dg-prune-output ".*(WARNING: unhandled.*syscall|own handler|README_MISSING_SYSCALL|Please report|valgrind.org).*" } */
 
 typedef signed int int32_t;
 typedef signed long int int64_t;