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Old 20 March 2020, 12:39   #1
roondar
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Using object files across different linkers?

I have a small question about object files as created by Amiga assemblers (or compilers). Are these "cross-linker" compatible?
As in: can I make an object file with say, ASM-One or PHXAss (or compilers like DICE C) and then link it using say the SAS linker, or VLINK?

Or are object files not generic but assembler/linker specific?
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Old 21 March 2020, 02:37   #2
phx
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Yes, usually they are compatible. Unlike the Atari ST, the Amiga's object file format was well defined and documented by Commodore. Refer to dos/doshunks.h. It uses similar hunk-format structures as executables to represent all sections, symbols, external references and relocations.
Debugging information may be tool-specific, but the structure of HUNK_DEBUG allows you to easily skip unsupported blocks. The SAS/C LINE debug hunk is widely supported, for example.

I remember only few development tools which generate incompatible object files. For example Aztec-C and some sloppy gcc ports.

Best description of Amiga hunk-format object files can be found in Ralph Babel's Amiga Guru Book.

Last edited by phx; 21 March 2020 at 02:52. Reason: Mention Line Debug
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Old 21 March 2020, 12:57   #3
roondar
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Thanks for the info, that is very useful to know
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