Visibility fixes for xlC

1 files changed, 7 insertions, 0 deletions

diff --git a/cpp/src/Ice/LoggerI.cpp b/cpp/src/Ice/LoggerI.cpp
index 44842207a3d..9552f9b0041 100644
--- a/cpp/src/Ice/LoggerI.cpp
+++ b/cpp/src/Ice/LoggerI.cpp
@@ -152,7 +152,14 @@ Ice::LoggerI::write(const string& message, bool indent)
             // If file size + message size exceeds max size we archive the log file,
             // but we do not archive empty files or truncate messages.
             //
+#ifdef __IBMCPP__
+            // xlC bug: without this work-around, we get a link error when compiling with
+            // optimization and -qvisibility=hidden
+            assert(_out.good());
+            size_t sz = static_cast<size_t>(_out.rdbuf()->pubseekoff(0, _out.cur, _out.out));
+#else
             size_t sz = static_cast<size_t>(_out.tellp());
+#endif
             if(sz > 0 && sz + message.size() >= _sizeMax && _nextRetry <= IceUtil::Time::now())
             {
                 string basename = _file;