diff --git a/src/OpenThreads/pthreads/GNUmakefile b/src/OpenThreads/pthreads/GNUmakefile
deleted file mode 100644
index a800725fd..000000000
--- a/src/OpenThreads/pthreads/GNUmakefile
+++ /dev/null
@@ -1,46 +0,0 @@
-TOPDIR = ../.
-include $(TOPDIR)/Make/makedefs
-
-C++FILES =  \
-	PThread.c++ \
-        PThreadMutex.c++ \
-        PThreadCondition.c++ \
-        PThreadBarrier.c++ \
-        $(NULL)
-
-INC += -I$(TOPDIR)/include -I.
-
-ifeq ($(OS),Linux) 
-DEF += -fPIC -DLinux -DGL_GLEXT_PROTOTYPES
-LIBS += -lpthread
-endif 
-
-ifeq ($(OS),SunOS)
-LIBS +=  -lpthread -lposix4
-endif
-
-ifeq ($(OS),IRIX)
-LIBS += -lpthread
-endif
-
-ifeq ($(OS),Darwin)
-LIBS += -lpthread
-endif
-
-ifeq ($(OS),CYGWIN)
-LIBS += -lpthread
-DEF +=  -DOPENTHREADS_EXPORTS
-endif
-
-ifeq ($(OS),MINGW)
-LIBS += -lpthread -lwinmm
-DEF +=  -DOPENTHREADS_EXPORTS
-endif
-
-TARGET_BASENAME = OpenThreads
-LIB = $(LIB_PREFIX)$(TARGET_BASENAME)
-
-ifeq ($(COMPILE_USING_TWO_PARAM_sched_setaffinity),yes)
-DEF += -DCOMPILE_USING_TWO_PARAM_sched_setaffinity
-endif
-include $(TOPDIR)/Make/makerules
diff --git a/src/OpenThreads/sproc/GNUmakefile b/src/OpenThreads/sproc/GNUmakefile
deleted file mode 100644
index 1da6eda22..000000000
--- a/src/OpenThreads/sproc/GNUmakefile
+++ /dev/null
@@ -1,17 +0,0 @@
-TOPDIR = ../.
-include $(TOPDIR)/Make/makedefs
-
-C++FILES =  \
-	SprocThread.c++ \
-        SprocMutex.c++ \
-        SprocBarrier.c++ \
-        SprocCondition.c++ \
-        SharedArena.c++ \
-        $(NULL)
-
-INC += -I$(TOPDIR)/include -I.
-
-TARGET_BASENAME = OpenThreads
-LIB = libOpenThreads
-
-include $(TOPDIR)/Make/makerules
diff --git a/src/OpenThreads/win32/GNUmakefile b/src/OpenThreads/win32/GNUmakefile
deleted file mode 100755
index 163b0cc8b..000000000
--- a/src/OpenThreads/win32/GNUmakefile
+++ /dev/null
@@ -1,38 +0,0 @@
-TOPDIR = ../.
-include $(TOPDIR)/Make/makedefs
-
-CXXFILES =  \
-	WIN32Condition.cpp \
-	Win32Mutex.cpp \
-	Win32Thread.cpp \
-	Win32ThreadBarrier.cpp \
-        $(NULL)
-
-INC += -I$(TOPDIR)/include -I.
-
-ifeq ($(OS),Linux) 
-DEF += -fPIC -DLinux -DGL_GLEXT_PROTOTYPES
-LIBS += -lpthread
-endif 
-
-ifeq ($(OS),SunOS)
-LIBS +=  -lpthread -lposix4
-endif
-
-ifeq ($(OS),IRIX)
-LIBS += -lpthread
-endif
-
-ifeq ($(OS),Darwin)
-LIBS += -lpthread
-endif
-
-ifeq ($(OS),MINGW)
-LIBS +=
-DEF +=  -DOPENTHREADS_EXPORTS
-endif
-
-TARGET_BASENAME = OpenThreads
-LIB = $(LIB_PREFIX)$(TARGET_BASENAME)
-
-include $(TOPDIR)/Make/makerules
diff --git a/src/OpenThreads/win32/OpenThreads.dsp b/src/OpenThreads/win32/OpenThreads.dsp
deleted file mode 100755
index 7e40f281c..000000000
--- a/src/OpenThreads/win32/OpenThreads.dsp
+++ /dev/null
@@ -1,231 +0,0 @@
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-# Microsoft Developer Studio Generated Build File, Format Version 6.00
-# ** DO NOT EDIT **
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-# TARGTYPE "Win32 (x86) Static Library" 0x0104
-
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-!MESSAGE use the Export Makefile command and run
-!MESSAGE 
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-!MESSAGE 
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-!MESSAGE 
-!MESSAGE Possible choices for configuration are:
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-!MESSAGE "OpenThreads - Win32 Debug" (based on "Win32 (x86) Dynamic-Link Library")
-!MESSAGE "OpenThreads - Win32 Release Static" (based on "Win32 (x86) Static Library")
-!MESSAGE "OpenThreads - Win32 Debug Static" (based on "Win32 (x86) Static Library")
-!MESSAGE 
-
-# Begin Project
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-# PROP Scc_ProjName ""
-# PROP Scc_LocalPath ""
-
-!IF  "$(CFG)" == "OpenThreads - Win32 Release"
-
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-# PROP BASE Use_Debug_Libraries 0
-# PROP BASE Output_Dir "Release"
-# PROP BASE Intermediate_Dir "Release"
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-# ADD BASE CPP /nologo /MD /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_WINDOWS" /D "_MBCS" /D "_USRDLL" /D "OPENTHREADS_EXPORTS" /YX /FD /c
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-MTL=midl.exe
-# ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
-# ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
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-# ADD RSC /l 0x409 /d "NDEBUG"
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-BSC32=bscmake.exe
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-# ADD BSC32 /nologo
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-
-!ELSEIF  "$(CFG)" == "OpenThreads - Win32 Release Static"
-
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-# PROP Ignore_Export_Lib 0
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-# ADD RSC /l 0x409 /d "NDEBUG"
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-# ADD BSC32 /nologo
-LIB32=link.exe -lib
-# ADD BASE LIB32 /nologo
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-
-!ELSEIF  "$(CFG)" == "OpenThreads - Win32 Debug Static"
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-# ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32
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-# ADD CPP /nologo /MTd /W3 /Gm /GR /GX /Z7 /Od /I "../include" /D "WIN32" /D "_DEBUG" /D "_WINDOWS" /D "_MBCS" /D "OT_LIBRARY_STATIC" /YX /FD /GZ /c
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-!ENDIF 
-
-# Begin Target
-
-# Name "OpenThreads - Win32 Release"
-# Name "OpenThreads - Win32 Debug"
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-# Name "OpenThreads - Win32 Debug Static"
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-# Begin Source File
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-SOURCE=.\WIN32Condition.cpp
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-# PROP Default_Filter "h;hpp;hxx;hm;inl"
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-# End Source File
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-SOURCE=..\include\OpenThreads\Condition
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-SOURCE=..\include\OpenThreads\Exports
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-SOURCE=.\HandleHolder.h
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diff --git a/src/OpenThreads/win32/OpenThreads.dsw b/src/OpenThreads/win32/OpenThreads.dsw
deleted file mode 100755
index be8b59a23..000000000
--- a/src/OpenThreads/win32/OpenThreads.dsw
+++ /dev/null
@@ -1,29 +0,0 @@
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