optlink options to reduce file size?

[Dmitry Olshansky]

On 28.07.2011 2:03, simendsjo wrote:
> On 27.07.2011 23:00, Dmitry Olshansky wrote:
>> On 27.07.2011 21:16, simendsjo wrote:
>>> On 27.07.2011 15:45, Dmitry Olshansky wrote:
>>>> On 27.07.2011 15:21, simendsjo wrote:
>>>>> A simple hello world like dfl application takes 1.2mb. Upx does a
>>>>> great job packing this to 200k, but I wonder if there is a way to 
>>>>> make
>>>>> optlink generate smaller executables?
>>>>>
>>>>> I couldn't find a way to get help on the numerous options in optlink,
>>>>> and the help page at digitalmars doesn't list them either.
>>>> I've noticed around two times smaller exes when linked with 
>>>> unilink. So
>>>> if you don't like packing you may try it:
>>>> ftp://ftp.styx.cabel.net/pub/UniLink/ulnb0319.zip
>>>> <ftp://ftp.styx.cabel.net/pub/UniLink/>
>>>> just make sure you configured it correctly (should be straightforward,
>>>> there are examples)
>>>>
>>>
>>> Thanks. Any idea if unilink works with libraries linked with optlink?
>>> I get "Error: Invalid library file (3) 'some optlink.lib'"
>>
>> For what it's worth any D2 app uses phobos.lib and obviously that
>> worked. Not that it was linked, library is a sort of a package with obj
>> files. Also check if this is in fact library it might very well be
>> renamed executable in which case 2 first bytes of file are 'MZ'.
>> It should work with both OMF (DMC, old MS VC++ etc.) and COFF (MinGW,
>> modern MS C++ etc.) libraries.
>>
>
> Tried a minimal sample using only phobos. Gave me another error:
> Error: Unresolved external '__acrtused_con' referenced from 't.obj'
> I downloaded the entire dm compiler and added snn.lib which solved the 
> problem.
>

Yes, I should have mentioned it. Btw snn.lib lives in dmd2\windows\lib

> I'm still getting linker errors on the old file though.
>
> > dmd t3 dfl.lib
> No problem.
>
> > ulink.exe -Go -Tpe t3.obj,t3.exe,,dfl.lib
> UniLink v1.07 [beta] (build 3.19)
> Error: Invalid library file (3) 'c:\d\ext\dwin\lib\dfl.lib'
Hm.. you might try to link with just object files then.  Still it's 
weird, could be a bug in unilink.
If you inclined that this is the case, send sample obj and lib to 
developers with some info ulink(at)styx.cabel.net
Judging by my experience, sending source code in addition to obj files 
is appreciated.

-- 
Dmitry Olshansky