>Number:         37131
>Category:       pkg
>Synopsis:       2 problems: i) NetBSD-current doesn't build because of signature of mremap(2) ii) os_mon driver doesn't build on NetBSD
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Oct 14 16:00:00 +0000 2007
>Originator:     Juraj Hercek
>Release:        -current
>Organization:
>Environment:
NetBSD pkgsrc.hck.sk 4.99.31 NetBSD 4.99.31 (PKGSRC) #0: Sat Sep 29 11:35:18 CEST 2007  juraj@core:/netbsd/obj/sys/arch/i386/compile/PKGSRC i386
>Description:
There are 2 problems:

1) mremap(2) signature in NetBSD-current is different from the one used in other OSes. This prevents erlang to be built because of compile error when compiling erts/emulator/sys/common/erl_mseg.c file

2) os_mon in lib/os_mon doesn't get built because memsup.c file tries to include vm/vm_param.h file which doesn't exist on NetBSD-current. Since the os_mon doesn't build, it is not installed, but still listed in PLIST.

NOTE: The above applies most probably to latest NetBSD-4.0 rc candidate as well.
>How-To-Repeat:
Try to build the system on NetBSD-current and i) wait for compile error, when you fix signature of the mremap(), continue in build and see the problem of missing os_mon stuff when building binary package.
>Fix:
Following 2 patches allowed me to build erlang on current NetBSD:

<patch-af>
$NetBSD$

The NetBSD got a mremap(2) function implemetation on 2007-07-17, however the
signature of the mremap(2) function differs from the one used in other systems.
This patch allows usage of the mremap(2) on current NetBSD.

--- erts/emulator/sys/common/erl_mseg.c.orig    2007-04-16 12:22:46.000000000 +0000
+++ erts/emulator/sys/common/erl_mseg.c
@@ -369,10 +369,18 @@ mseg_recreate(void *old_seg, Uint old_si
 #if defined(ERTS_MSEG_FAKE_SEGMENTS)
     new_seg = erts_sys_realloc(ERTS_ALC_N_INVALID, NULL, old_seg, new_size);
 #elif HAVE_MREMAP
+#if defined(__NetBSD__)
+    new_seg = (void *) mremap((void *) old_seg,
+                              (size_t) old_size,
+                              (void *) old_seg,
+                              (size_t) new_size,
+                              0);
+#else
     new_seg = (void *) mremap((void *) old_seg,
                              (size_t) old_size,
                              (size_t) new_size,
                              MREMAP_MAYMOVE);
+#endif
     if (new_seg == (void *) MAP_FAILED)
        new_seg = NULL;
 #else
</patch-af>

<patch-ag>
$NetBSD$

NetBSD doesn't have vm/vm_param.h file and including it ends in compiler error.
This patch allows building erlang's os_mon on NetBSD.

--- lib/os_mon/c_src/memsup.c.orig      2007-10-14 12:45:03.000000000 +0000
+++ lib/os_mon/c_src/memsup.c
@@ -98,7 +98,7 @@
 #ifdef BSD4_4
 #include <sys/types.h>
 #include <sys/sysctl.h>
-#ifndef __OpenBSD__
+#if !defined(__OpenBSD__) && !defined(__NetBSD__)
 #include <vm/vm_param.h>
 #endif
 #if defined(__FreeBSD__) || defined(__DragonFly__)
</patch-ag>

After adding patch files to patches directory, recreate distinfo file with "make mdi".