--- openexr-1.4.0/IlmThread/Makefile.am~	2006-06-08 12:27:41 +0400
+++ openexr-1.4.0/IlmThread/Makefile.am	2007-05-14 14:50:27 +0400
@@ -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 -lpthread
 
 libIlmThreadincludedir = $(includedir)/OpenEXR