-dnl ------ Threads
-AC_ARG_ENABLE(threads, [ --disable-threads disable threads],[enable_threads=$enableval],[enable_threads=yes])
-if test "$enable_threads" = "yes"; then
+AC_SUBST(LIBTHREAD)
+AC_SUBST(CFLAGSTHREADS)
+HAVETHREADS=0
+CFLAGSTHREADS=""
+LIBTHREAD=""
+dnl
+AC_ARG_ENABLE(pth, [ --enable-pth enable GNU threads],[enable_pth=$enableval],[enable_pth=no])
+AC_SUBST(LIBPTH)
+if test "$enable_pth" = "yes"; then
+ OLIBS=$LIBS
+ AC_CHECK_LIB(pth,main)
+ if test "$ac_cv_lib_pth_main" = "yes"; then
+ AC_CHECK_HEADERS(pth.h)
+ if test "$ac_cv_header_pth_h" = "yes"; then
+ LIBTHREAD="-lpth"
+ CFLAGSTHREADS="-DYAZ_GNU_THREADS=1"
+ HAVETHREADS=1
+ fi
+ fi
+ LIBS=$OLIBS
+fi
+dnl
+dnl ------ POSIX Threads
+AC_ARG_ENABLE(threads, [ --disable-threads disable POSIX threads],[enable_threads=$enableval],[enable_threads=yes])
+if test "$enable_threads" = "yes" -a "$HAVETHREADS" = "0"; then
+ OLIBS=$LIBS
+ OCC=$CC