LC_SEGMENT command 0 filesize field greater than vmsize field

[Jacob Carlborg]

On 2010-11-12 14:41, Michel Fortin wrote:
> On 2010-11-12 04:08:56 -0500, Jacob Carlborg <doob at me.com> said:
>
>> Now this really starts to annoy me. I don't know if it's a bug in Mac
>> OS X or in DMD but I'm getting this error when building some libraries
>> (Tango, for example):
>>
>> /usr/bin/ranlib: object: libtango.a(tango-coreBitArray-release.o)
>> malformed object (LC_SEGMENT command 0 filesize field greater than
>> vmsize field)
>> ar: internal ranlib command failed
>
> I've seen something similar too with some transitory test cases while
> playing with DMD to generate Objective-C data structures. I'd tend to
> believe there's a bug in the backend. I didn't know this bug could be
> trigged by compiling code with regular DMD, it could have been something
> I trigged playing with the compiler to make it generate extra Objectve-C
> segments/sections.
>
> If you want to inspect the object file, I suggest you extract
> tango-coreBitArray-release.o from the libtango.a archive and play with
> otool, objdump, dumpobj, and perhaps obj2asm. The first two are provided
> with Apple's developer tools so they and tend to better reflect the
> linker in their understanding of the object file format; the later two
> come with DMD and better reflect Walter's implementation.

I used the dumpobj tool to inspect the LC_SEGMENT and just as the error 
message says, the filesize field is greater than the vmsize field.

-- 
/Jacob Carlborg