1 files changed, 39 insertions, 0 deletions
diff --git a/m4/physmem.m4 b/m4/physmem.m4
new file mode 100644
index 0000000..456bb37
--- /dev/null
+++ b/m4/physmem.m4
@@ -0,0 +1,39 @@
+# physmem.m4 serial 7
+dnl Copyright (C) 2002, 2003, 2005, 2006 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.
+
+# Check for the external symbol, _system_configuration,
+# a struct with member `physmem'.
+AC_DEFUN([gl_SYS__SYSTEM_CONFIGURATION],
+  [AC_CACHE_CHECK(for external symbol _system_configuration,
+		  gl_cv_var__system_configuration,
+    [AC_LINK_IFELSE([AC_LANG_PROGRAM(
+		      [[#include <sys/systemcfg.h>
+		      ]],
+		      [double x = _system_configuration.physmem;
+		       if (x > 0.0) return 0;])],
+      [gl_cv_var__system_configuration=yes],
+      [gl_cv_var__system_configuration=no])])
+
+    if test $gl_cv_var__system_configuration = yes; then
+      AC_DEFINE(HAVE__SYSTEM_CONFIGURATION, 1,
+		[Define to 1 if you have the external variable,
+		_system_configuration with a member named physmem.])
+    fi
+  ]
+)
+
+AC_DEFUN([gl_PHYSMEM],
+[
+  AC_LIBOBJ([physmem])
+
+  # Prerequisites of lib/physmem.c.
+  AC_CHECK_HEADERS([sys/pstat.h sys/sysmp.h sys/sysinfo.h \
+    machine/hal_sysinfo.h sys/table.h sys/param.h sys/sysctl.h \
+    sys/systemcfg.h],,, [AC_INCLUDES_DEFAULT])
+
+  AC_CHECK_FUNCS(pstat_getstatic pstat_getdynamic sysmp getsysinfo sysctl table)
+  AC_REQUIRE([gl_SYS__SYSTEM_CONFIGURATION])
+])