Implement nproc for NetBSD, OpenBSD.

[gnulib.git] / m4 / nproc.m4

diff --git a/m4/nproc.m4 b/m4/nproc.m4
new file mode 100644 (file)
index 0000000..73b812d
--- /dev/null
+++ b/m4/nproc.m4
@@ -0,0 +1,24 @@
+# nproc.m4 serial 1
+dnl Copyright (C) 2009 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_NPROC],
+[
+  gl_PREREQ_NPROC
+])
+
+# Prerequisites of lib/nproc.c.
+AC_DEFUN([gl_PREREQ_NPROC],
+[
+  AC_CHECK_HEADERS([sys/param.h],,, [AC_INCLUDES_DEFAULT])
+  dnl <sys/sysctl.h> requires <sys/param.h> on OpenBSD 4.0.
+  AC_CHECK_HEADERS([sys/sysctl.h],,,
+    [AC_INCLUDES_DEFAULT
+     #if HAVE_SYS_PARAM_H
+     # include <sys/param.h>
+     #endif
+    ])
+  AC_CHECK_FUNCS([sysctl])
+])