diff -up ilmbase-1.0.2/IlmThread/Makefile.am.pthread_hack ilmbase-1.0.2/IlmThread/Makefile.am
--- ilmbase-1.0.2/IlmThread/Makefile.am.pthread_hack	2006-12-08 16:23:08.000000000 -0600
+++ ilmbase-1.0.2/IlmThread/Makefile.am	2010-12-08 09:25:35.753537799 -0600
@@ -11,7 +11,7 @@ libIlmThread_la_SOURCES = IlmThreadPool.
 			  IlmThreadMutexPosix.cpp
 
 libIlmThread_la_LDFLAGS = -version-info @LIBTOOL_VERSION@ -no-undefined
-libIlmThread_la_LIBADD = ../Iex/libIex.la
+libIlmThread_la_LIBADD = ../Iex/libIex.la $(PTHREAD_LIBS)
 
 libIlmThreadincludedir = $(includedir)/OpenEXR
 
@@ -23,4 +23,4 @@ noinst_HEADERS = 
 EXTRA_DIST = $(noinst_HEADERS) IlmThreadMutexWin32.cpp IlmThreadSemaphoreWin32.cpp \
 	     IlmThreadWin32.cpp
 
-INCLUDES = -I$(top_builddir) -I$(top_srcdir)/Iex -I$(top_srcdir)/config
\ No newline at end of file
+INCLUDES = -I$(top_builddir) -I$(top_srcdir)/Iex -I$(top_srcdir)/config
diff -up ilmbase-1.0.2/IlmThread/Makefile.in.pthread_hack ilmbase-1.0.2/IlmThread/Makefile.in
--- ilmbase-1.0.2/IlmThread/Makefile.in.pthread_hack	2010-07-22 20:13:12.000000000 -0500
+++ ilmbase-1.0.2/IlmThread/Makefile.in	2010-12-08 09:26:10.136971078 -0600
@@ -208,7 +208,7 @@ libIlmThread_la_SOURCES = IlmThreadPool.
 			  IlmThreadMutexPosix.cpp
 
 libIlmThread_la_LDFLAGS = -version-info @LIBTOOL_VERSION@ -no-undefined
-libIlmThread_la_LIBADD = ../Iex/libIex.la
+libIlmThread_la_LIBADD = ../Iex/libIex.la $(PTHREAD_LIBS)
 libIlmThreadincludedir = $(includedir)/OpenEXR
 libIlmThreadinclude_HEADERS = IlmThreadPool.h IlmThread.h \
 			      IlmThreadSemaphore.h IlmThreadMutex.h