libstdc++: testsuite: Add missing <string> header

libstdc++-v3/ChangeLog:

	* testsuite/ext/mt_allocator/22309_thread.cc: Include <string>.

diff --git a/libstdc++-v3/testsuite/ext/mt_allocator/22309_thread.cc b/libstdc++-v3/testsuite/ext/mt_allocator/22309_thread.cc
index 2d94ea3a111039e7806b52f9d7a4b141d0232df7..99cbb0ffbb8374f8a658629c31b41b5175e89e65 100644 (file)
--- a/libstdc++-v3/testsuite/ext/mt_allocator/22309_thread.cc
+++ b/libstdc++-v3/testsuite/ext/mt_allocator/22309_thread.cc
@@ -22,6 +22,7 @@
 #include <pthread.h>
 #include <cstdlib>
 #include <stdexcept>
+#include <string>
 
 void
 check_dlopen(void*& h)