start:
   ;code
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format coff
entry start
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  ;...    

Object file converter version 2.12 for x86 and x86-64 platforms.
Copyright (c) 2011 by Agner Fog. Gnu General Public License.

Usage: objconv options inputfile [outputfile]

Options:
-fXXX[SS] Output file format XXX, word size SS. Supported formats:
PE, COFF, ELF, OMF, MACHO

-fasm Disassemble file (-fmasm, -fnasm, -fyasm, -fgasm)

-dXXX Dump file contents to console.
Values of XXX (can be combined):
f: File header, h: section Headers, s: Symbol table,
r: Relocation table, n: string table.

-xs Strip exception handling info and other incompatible info.
-xp Preserve exception handling info and other incompatible info.

-nu change symbol Name Underscores to the default for the target format.
-nu- remove Underscores from symbol Names.
-nu+ add Underscores to symbol Names.
-nd replace Dot/underscore in section names.
-nr:N1:N2 Replace symbol Name N1 with N2.
-ar:N1:N2 make Alias N2 for existing public name N1.
-np:N1:N2 Replace symbol Prefix N1 with N2.
-nw:N1 make public symbol Name N1 Weak (ELF and MAC64 only).
-nl:N1 make public symbol Name N1 Local (invisible).

-lx eXtract all members from Library.
-lx:N1:N2 eXtract member N1 from Library to file N2.
-ld:N1 Delete member N1 from Library.
-la:N1:N2 Add object file N1 to Library as member N2.
Alternative: -lib LIBRARYNAME OBJECTFILENAMES.

-vN Verbose options. Values of N:
0: Silent, 1: Print file names and types, 2: Tell about conversions.

-wdNNN Disable Warning NNN.
-weNNN treat Warning NNN as Error. -wex: treat all warnings as errors.
-edNNN Disable Error number NNN.
-ewNNN treat Error number NNN as Warning.

-h Print this help screen.

@RFILE Read additional options from response file RFILE.


Example:
objconv -felf32 -nu filename.obj filename.o