From David Fries, "I was trying to create a lot of threads under 32 bit Linux, but could

only create 376, then the program would hang.
376 * 8MB stack per thread = 3008 MB
The stack size allocated per thread blew the process address stack.
To get more threads you have to specify a smaller per thread stack,
but while the Thread::start says it will limit the stack size to the
smallest allowable stack size, it won't let it be smaller than the
default.  I included the limits.h header to use PTHREAD_STACK_MIN as
the minimum stack size.

As for the deadlock, if the pthread_create failed, the new thread
doesn't exist and doesn't call threadStartedBlock.release(), so the
existing thread deadlocks on threadStartedBlock.block().  Only block
if the thread was started."

include/osgDB/Output

@@ -91,9 +91,11 @@ class OSGDB_EXPORT Output : public osgDB::ofstream
         virtual std::string getFileNameForOutput(const std::string& filename) const;
         const std::string& getFileName() const { return _filename; }
 
+        // Set and get if export texture files during write
         void setOutputTextureFiles(bool flag) { _outputTextureFiles = flag; }
         bool getOutputTextureFiles() const { return _outputTextureFiles; }
 
+        // support code for OutputTextureFiles
         virtual std::string getTextureFileNameForOutput();
 
         void setOutputShaderFiles(bool flag) { _outputShaderFiles = flag; }