commit bbee87be3bfaa1ef19521870df998386f83d7ac2
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Apr 15 16:39:55 2021

    libstdc++: Add -latomic to test flags for 32-bit sparc-linux
    
    Without this I see a number of tests failing when -m32 is used.
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/lib/dg-options.exp (add_options_for_libatomic): Also
            add libatomic options for 32-bit sparc*-*-linux-gnu.

diff --git a/libstdc++-v3/testsuite/lib/dg-options.exp b/libstdc++-v3/testsuite/lib/dg-options.exp
index 5160e4a72d1..7894973bcca 100644
--- a/libstdc++-v3/testsuite/lib/dg-options.exp
+++ b/libstdc++-v3/testsuite/lib/dg-options.exp
@@ -264,6 +264,7 @@ proc add_options_for_libatomic { flags } {
     if { [istarget hppa*-*-hpux*]
 	 || ([istarget powerpc*-*-*] && [check_effective_target_ilp32])
 	 || [istarget riscv*-*-*]
+	 || ([istarget sparc*-*-linux-gnu] && [check_effective_target_ilp32])
        } {
 	return "$flags -L../../libatomic/.libs -latomic"
     }