omf lib to coff conversion

[jack]

can someone point me to documentation on the omf and coff formats? what i really need is an omf lib to coff lib converter.
searching the web turned up nothing, Digital Mars C comes with a small utility "coff2omf" which converts a coff lib to omf.

[hutch--]

jack,

I have moved this topic to the workshop so you will get more answers.

[jack]

thanks Hutch, searching the web i found some mention that Microsoft 16-bit lib supports omf objects, i'll have to some studying. :)

[hutch--]

jack,

The Microsoft linkers usually convert OMF to COFF and generate a warning while doing so. It seems its because they support both OMF and COFF so tis may be an easy way for you to do conversions of this type.

[Vortex]

Hi jack,

Converting a single OMF object file is easy :

Code Select Expand


link -edit objfilename.obj


To convert a STATIC library ( OMF type ) , you need to extract all the member object modules, convert them to COFF and then rebuild the library.

[jack]

how do you get the names of the objects in an omf lib?
I tried lib /list libname.lib with no result

[Vortex]

You need to use the librarian from Digital Mars supporting OMF libraries:

Code Select Expand


lib -l libname.lib

This command creates a listing file named libname.lst . This file provides information about the names of object files.

[jack]

thanks hutch and Vortex, one more question, are all the names returned valid objects?
for example

??0pDNameNode@@QAE@PAVDName@@@Z  undname
??0type_info@@AAE@ABV0@@Z        typinfo
??1exception@@UAE@XZ             stdexcpt
??1type_info@@UAE@XZ             typinfo

are they all needed to rebuild the lib or do i weed out the "undname" and  such.