re PR libstdc++/89461 (FAIL: experimental/net/timer/waitable/cons.cc)

	PR libstdc++/89461
	* testsuite/lib/libstdc++.exp: Locate libatomic.
	* testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
	* testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
	libatomic options.
	* testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
	* testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
	* testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
	* testsuite/experimental/net/timer/waitable/ops.cc: Likewise.

From-SVN: r269628

libstdc++-v3/ChangeLog

+2019-03-12  John David Anglin  <dave.anglin@bell.net>
+
+	PR libstdc++/89461
+	* testsuite/lib/libstdc++.exp: Locate libatomic.
+	* testsuite/lib/dg-options.exp (add_options_for_libatomic): New.
+	* testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc: Add
+	libatomic options.
+	* testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc: Likewise.
+	* testsuite/experimental/net/timer/waitable/cons.cc: Likewise.
+	* testsuite/experimental/net/timer/waitable/dest.cc: Likewise.
+	* testsuite/experimental/net/timer/waitable/ops.cc: Likewise.
+
 2019-03-11  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/89460

libstdc++-v3/testsuite/20_util/shared_ptr/thread/default_weaktoshared.cc

@@ -19,6 +19,7 @@
 
 // { dg-do run }
 // { dg-options "-pthread"  }
+// { dg-add-options libatomic }
 // { dg-require-effective-target c++11 }
 // { dg-require-effective-target pthread }
 // { dg-require-cstdint "" }

libstdc++-v3/testsuite/20_util/shared_ptr/thread/mutex_weaktoshared.cc

@@ -19,6 +19,7 @@
 
 // { dg-do run }
 // { dg-options "-pthread"  }
+// { dg-add-options libatomic }
 // { dg-require-effective-target c++11 }
 // { dg-require-effective-target pthread }
 // { dg-require-cstdint "" }

libstdc++-v3/testsuite/experimental/net/timer/waitable/cons.cc

@@ -16,6 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do run { target c++14 } }
+// { dg-add-options libatomic }
 
 #include <experimental/timer>
 #include <testsuite_hooks.h>

libstdc++-v3/testsuite/experimental/net/timer/waitable/dest.cc

@@ -16,6 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do run { target c++14 } }
+// { dg-add-options libatomic }
 
 #include <experimental/timer>
 #include <testsuite_hooks.h>

libstdc++-v3/testsuite/experimental/net/timer/waitable/ops.cc

@@ -16,6 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do run { target c++14 } }
+// { dg-add-options libatomic }
 
 #include <experimental/timer>
 #include <testsuite_hooks.h>

libstdc++-v3/testsuite/lib/dg-options.exp

@@ -257,6 +257,15 @@ proc add_options_for_net_ts { flags } {
     return $flags
 }
 
+# Add to FLAGS all the target-specific flags to link to libatomic, if required.
+
+proc add_options_for_libatomic { flags } {
+    if { [istarget hppa*-*-hpux*] || [istarget riscv*-*-*] } {
+	return "$flags -L../../libatomic/.libs -latomic"
+    }
+    return $flags
+}
+
 # Like dg-options, but adds to the default options rather than replacing them.
 
 proc dg-additional-options { args } {

libstdc++-v3/testsuite/lib/libstdc++.exp

@@ -161,6 +161,17 @@ proc libstdc++_init { testfile } {
     }
     v3track gccdir 3
 
+    # Locate libatomic.
+    set v3-libatomic 0
+    set libatomicdir [lookfor_file $blddir/../libatomic .libs/libatomic.$shlib_ext]
+    if {$libatomicdir != ""} {
+	set v3-libatomic 1
+	set libatomicdir [file dirname $libatomicdir]
+	append ld_library_path_tmp ":${libatomicdir}"
+	verbose -log "libatomic support detected"
+    }
+    v3track libatomicdir 3
+
     # Locate libgomp. This is only required for parallel mode.
     set v3-libgomp 0
     set libgompdir [lookfor_file $blddir/../libgomp .libs/libgomp.$shlib_ext]