vm_dump.c: check by configured result

* vm_dump.c (rb_vm_bugreport): check by configured result instead
  of system name for old FreeBSD.  based on a patch by Steve Wills
  at [ruby-core:67655].  [Bug #10752]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49321 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sun Jan 18 15:50:39 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* vm_dump.c (rb_vm_bugreport): check by configured result instead
+	  of system name for old FreeBSD.  based on a patch by Steve Wills
+	  at [ruby-core:67655].  [Bug #10752]
+
 Sun Jan 18 12:56:49 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* Makefile.in (VPATH, NEWLINE_C), common.mk (common-srcs): make

vm_dump.c

@@ -711,7 +711,7 @@ rb_print_backtrace(void)
 #endif
 }
 
-#ifdef __FreeBSD__
+#ifdef HAVE_LIBPROCSTAT
 #include <sys/user.h>
 #include <sys/sysctl.h>
 #include <sys/param.h>
@@ -1033,7 +1033,7 @@ rb_vm_bugreport(const void *ctx)
 	    }
 	}
 #endif /* __linux__ */
-#ifdef __FreeBSD__
+#ifdef HAVE_LIBPROCSTAT
 # define MIB_KERN_PROC_PID_LEN 4
 	int mib[MIB_KERN_PROC_PID_LEN];
 	struct kinfo_proc kp;