Index: Makefile
===================================================================
--- Makefile
+++ Makefile
@@ -57,14 +57,16 @@
 
 OPTIONS_DEFAULT=LIBEDIT_DL DOCS
 
-OPTIONS_GROUP=	DOCSGRP DEBUGGRP
+OPTIONS_GROUP=	DOCSGRP DEBUGGRP PTHRDGRP
 OPTIONS_SINGLE=	EDITGRP
 
 OPTIONS_GROUP_DOCSGRP=	DOCS
 OPTIONS_GROUP_DEBUGGRP=	ASSERT APICHECK
+OPTIONS_GROUP_PTHRDGRP= PTHREAD
 
 OPTIONS_SINGLE_EDITGRP=	EDITNONE LIBEDIT_DL LIBEDIT READLINE
 
+#~ OPTIONS_SINGLE=	PTHREAD_GROUP
 # Option descriptions
 
 DEBUGGRP_DESC=	Debugging options
@@ -74,12 +76,13 @@
 DOCSGRP_DESC=	Documentation options
 DOCS_DESC=	Install language and API reference (HTML, ~400kB)
 
-EDITGRP_DESC=	Interactive command-line editing
-EDITNONE_DESC=	No command-line editing
-LIBEDIT_DL_DESC=Use dynamically loaded libedit (recommended)
-LIBEDIT_DESC=	Use libedit (breaks lcurses)
-READLINE_DESC=	Use GNU Readline (breaks lcurses)
-
+EDITGRP_DESC=		Interactive command-line editing
+EDITNONE_DESC=		No command-line editing
+LIBEDIT_DL_DESC=	Use dynamically loaded libedit (recommended)
+LIBEDIT_DESC=		Use libedit (breaks lcurses)
+READLINE_DESC=		Use GNU Readline (breaks lcurses)
+PTHRDGRP_DESC=	Threading
+PTHREAD_DESC=	Link to pthread. Required for cqueues, luaossl
 # Option implementations
 
 ASSERT_EXTRA_PATCHES=	${PATCHDIR}/extra-patch-assert
@@ -99,6 +102,7 @@
 READLINE_CPPFLAGS=	-DLUA_USE_READLINE
 READLINE_LIBS=		-lreadline
 
+PTHREAD_LIBS=	-pthread
 # end of option vars
 
 CFLAGS+=	-fPIC