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Text of WWN article "DLL overrides".
2000-06-07 06:00:01 +02:00
DLL overrides
-------------
The wine.conf directives [DllDefaults] and [DllOverrides] are the
subject of some confusion. The overall purpose of most of these
directives are clear enough, though - given a choice, should Wine use
its own built-in DLLs, or should it use .DLL files found in an
existing Windows installation? This document explains how this feature
works.
DLL types
native
A "native" DLL is a .DLL file written for the real Microsoft
Windows.
builtin
A "builtin" DLL is a Wine DLL. These can either be a part of
libwine.so, or more recently, in a special .so file that Wine
is able to load on demand.
elfdll
An "elfdll" is a Wine .so file with a special Windows-like file
structure that is as close to Windows as possible, and that can
also seamlessly link dynamically with "native" DLLs, by using
special ELF loader and linker tricks. Bertho Stultiens did some
work on this, but this feature has not yet been merged back
into Wine (because of political reasons and lack of time), so
this DLL type does not exist in the official Wine at this time.
In the meantime, the "builtin" DLL type gained some of the
features of elfdlls (such as dynamic loading), so it's possible
that "elfdll" functionality will be folded into "builtin" at
some point.
so
A native Unix .so file, with calling convention conversion
thunks generated on the fly as the library is loaded. This is
mostly useful for libraries such as "glide" that has exactly
the same API on both Windows and Unix.
The [DllDefaults] section
EXTRA_LD_LIBRARY_PATH
This specifies the location of the Wine's DLL .so files. Wine
will search this path when trying to locate a DLL of the type
"builtin" or "elfdll". (This does not apply to libwine.so,
since libwine.so is not a DLL in this sense.)
DefaultLoadOrder
This specifies in what order Wine should search for available
DLL types, if the DLL in question was not found in the
[DllOverrides] section.
The [DllPairs] section
At one time, there was a section called [DllPairs] in the default
configuration file, but this has been obsoleted because the pairing
information has now been embedded into Wine itself. (The purpose of
this section was merely to be able to issue warnings if the user
attempted to pair codependent 16-bit/32-bit DLLs of different types.)
If you still have this in your wine.conf or .winerc, you may safely
delete it.
The [DllOverrides] section
This section specifies how you want specific DLLs to be handled, in
particular whether you want to use "native" DLLs or not, if you have
some from a real Windows configuration. Because builtins do not mix
seamlessly with native DLLs yet, certain DLL dependencies may be
problematic, but workarounds exist in Wine for many popular DLL
configurations. Also see WWN's [16]Status Page to figure out how well
your favorite DLL is implemented in Wine.
It is of course also possible to override these settings by explictly
using Wine's --dll command-line option (see the man page for details).
Some hints for choosing your optimal configuration (listed by
16/32-bit DLL pair):
krnl386, kernel32
Native versions of these will never work, so don't try. Leave
at builtin.
gdi, gdi32
Graphics Device Interface. No effort has been made at trying to
run native GDI. Leave at builtin.
user, user32
Window management and standard controls. It was possible to use
Win95's native versions at some point (if all other DLLs that
depend on it, such as comctl32 and comdlg32, were also run
native). However, this is no longer possible after the Address
Space Separation, so leave at builtin.
ntdll
NT kernel API. Although badly documented, the native version of
this will never work. Leave at builtin.
w32skrnl
Win32s (for Win3.x). Native version will probably never work.
Leave at builtin.
wow32
Win16 support library for NT. Native version will probably
never work. Leave at builtin.
system
Win16 kernel stuff. Will never work native. Leave at builtin.
display
Display driver. Definitely leave at builtin.
toolhelp
Tool helper routines. This is rarely a source of problems.
Leave at builtin.
ver, version
Versioning. Seldom useful to mess with.
advapi32
Registry and security features. Trying the native version of
this may or may not work.
commdlg, comdlg32
Common Dialogs, such as color picker, font dialog, print
dialog, open/save dialog, etc. It is safe to try native.
commctrl, comctl32
Common Controls. This is toolbars, status bars, list controls,
the works. It is safe to try native.
shell, shell32
Shell interface (desktop, filesystem, etc). Being one of the
most undocumented pieces of Windows, you may have luck with the
native version, should you need it.
winsock, wsock32
Windows Sockets. The native version will not work under Wine,
so leave at builtin.
icmp
ICMP routines for wsock32. As with wsock32, leave at builtin.
mpr
The native version may not work due to thunking issues. Leave
at builtin.
lzexpand, lz32
Lempel-Ziv decompression. Wine's builtin version ought to work
fine.
winaspi, wnaspi32
Advanced SCSI Peripheral Interface. The native version will
probably never work. Leave at builtin.
crtdll
C Runtime library. The native version will easily work better
than Wine's on this one.
winspool.drv
Printer spooler. You are not likely to have more luck with the
native version.
ddraw
DirectDraw/Direct3D. Since Wine does not implement the DirectX
HAL, the native version will not work at this time.
dinput
DirectInput. Running this native may or may not work.
dsound
DirectSound. It may be possible to run this native, but don't
count on it.
dplay/dplayx
DirectPlay. Native ought to work best on this, if at all.
mmsystem, winmm
Multimedia system. The native version is not likely to work.
Leave at builtin.
msacm, msacm32
Audio Compression Manager. Builtin works best, if you set
msacm.drv to the same.
msvideo, msvfw32
Video for Windows. It is safe (and recommended) to try native.
mcicda.drv
CD Audio MCI driver.
mciseq.drv
MIDI Sequencer MCI driver (.MID playback).
mciwave.drv
Wave audio MCI driver (.WAV playback).
mciavi.drv
AVI MCI driver (.AVI video playback). Best to use native.
mcianim.drv
Animation MCI driver.
msacm.drv
Audio Compression Manager. Set to same as msacm32.
midimap.drv
MIDI Mapper.
wprocs
This is a pseudo-DLL used by Wine for thunking purposes. A
native version of this doesn't exist.
Have fun...
- Ove K<>ven