[gcc(refs/users/aoliva/heads/testme)] libstdc++: testsuite: use -lbsd for net_ts on RTEMS

[Alexandre Oliva <aoliva@gcc.gnu.org>]

https://gcc.gnu.org/g:9ed71d6e0d61623bbc1f18694946323230b6531e

commit 9ed71d6e0d61623bbc1f18694946323230b6531e
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Mon Jun 20 20:44:05 2022 -0300

    libstdc++: testsuite: use -lbsd for net_ts on RTEMS
    
    Networking functions that net_ts tests rely on are defined in libbsd
    on RTEMS, so link with it.
    
    
    for  libstdc++-v3/ChangeLog
    
            * testsuite/lib/dg-options.exp (add_options_for_net_ts): Add
            -lbsd for RTEMS targets.

Diff:
---
 libstdc++-v3/testsuite/lib/dg-options.exp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libstdc++-v3/testsuite/lib/dg-options.exp b/libstdc++-v3/testsuite/lib/dg-options.exp
index 203bb0dfed5..15f37da468a 100644
--- a/libstdc++-v3/testsuite/lib/dg-options.exp
+++ b/libstdc++-v3/testsuite/lib/dg-options.exp
@@ -253,6 +253,12 @@ proc add_options_for_net_ts { flags } {
     # libsocket and libnsl for networking applications.
     if { [istarget *-*-solaris2*] } {
 	return "$flags -lsocket -lnsl"
+    } elseif { [istarget *-*-rtems*] } {
+	# Adding -Wl,--gc-sections would enable a few more tests to
+	# link, but all of them fail at runtime anyway, because the
+	# io_context ctor calls pipe(), which always fails, and thus
+	# the ctor throws a system error.
+	return "$flags -lbsd"
     }
     return $flags
 }