Enable TSRM to use Pth

TSRM/tsrm.m4

@@ -10,7 +10,26 @@ AC_CHECK_HEADERS(stdarg.h)
 
 ])
 
-AC_DEFUN(TSRM_PTHREAD,[
+
+AC_DEFUN(TSRM_CHECK_PTH,[
+
+AC_MSG_CHECKING(for GNU Pth)
+PTH_PREFIX="`$1 --prefix`"
+if test -z "$PTH_PREFIX"; then
+  AC_MSG_RESULT(Please check your Pth installation)
+fi
+
+CPPFLAGS="$CPPFLAGS `$1 --cflags`"
+LDFLAGS="$LDFLAGS `$1 --ldflags`"
+LIBS="$LIBS `$1 --libs`"
+
+AC_DEFINE(GNUPTH, 1, [Whether you use GNU Pth])
+AC_MSG_RESULT(yes - installed in $PTH_PREFIX)
+
+])
+
+
+AC_DEFUN(TSRM_CHECK_PTHREADS,[
 
 dnl Check for FreeBSD/Linux -pthread option
 
@@ -30,4 +49,37 @@ dnl Fall back to the standard -lpthread
 fi
 		
 AC_DEFINE(PTHREADS, [], Whether to use Pthreads)
+
+AC_MSG_CHECKING(for POSIX threads)
+AC_MSG_RESULT(yes)
+])
+
+
+AC_DEFUN(TSRM_OTHER_CHECKS,[
+
+dnl For the thread implementations, we always use --with-*
+dnl to maintain consistency
+
+AC_ARG_WITH(tsrm-pth,
+[  --with-tsrm-pth[=pth-config]    Use GNU Pth.],[
+  TSRM_PTH=$withval
+],[
+  TSRM_PTH=no
+])
+
+AC_ARG_WITH(tsrm-pthreads,
+[  --with-tsrm-pthreads    Use POSIX threads (default)],[
+  TSRM_PTHREADS=$withval
+],[
+  TSRM_PTHREADS=yes
+])
+
+test "$TSRM_PTH" = "yes" && TSRM_PTH=pth-config
+
+if test "$TSRM_PTH" != "no"; then
+  TSRM_CHECK_PTH($TSRM_PTH)
+elif test "$TSRM_PTHREADS" != "no"; then
+  TSRM_CHECK_PTHREADS
+fi
+
 ])