nxcomp: add AX_PTHREAD code from autoconf-archive and check for pthread support.

nxcomp/configure.ac

@@ -63,6 +63,8 @@ if test "$FreeBSD" = yes; then
   CPPFLAGS="$CPPFLAGS -I/usr/local/include"
 fi
 
+AX_PTHREAD([], AC_MSG_ERROR([no POSIX threads support detected]))
+
 # If in_addr_t is not defined use unsigned int.
 AC_CHECK_TYPES([in_addr_t], [], [], [[#include <netinet/in.h>]])
 

nxcomp/src/Makefile.am

@@ -120,6 +120,7 @@ libXcomp_la_LIBADD =					\
     @JPEG_LIBS@						\
     @PNG_LIBS@						\
     @Z_LIBS@						\
+    @PTHREAD_LIBS@					\
     $(NULL)
 
 AM_CXXFLAGS = 						\
@@ -127,13 +128,18 @@ AM_CXXFLAGS = 						\
     $(JPEG_CFLAGS)					\
     $(PNG_CFLAGS)					\
     $(Z_CFLAGS)						\
+    $(PTHREAD_CFLAGS)					\
     $(NULL)
 
 AM_CPPFLAGS =						\
     -I$(top_srcdir)/include				\
     $(NULL)
 
-libXcomp_la_LDFLAGS = -version-number @LT_COMP_VERSION@ -no-undefined
+libXcomp_la_LDFLAGS =					\
+    -version-number @LT_COMP_VERSION@			\
+    -no-undefined					\
+    $(PTHREAD_LDFLAGS)					\
+    $(NULL)
 
 libXcompincludedir = $(includedir)/nx
 libXcompinclude_HEADERS =				\