[fpc-devel] Assembler file option (-a)

Sven Barth pascaldragon at googlemail.com
Fri Dec 31 21:43:22 CET 2021

Christo Crause via fpc-devel <fpc-devel at lists.freepascal.org> schrieb am
Fr., 31. Dez. 2021, 16:58:

> On Fri, Dec 31, 2021 at 4:41 PM Marco Borsari via fpc-devel <
> fpc-devel at lists.freepascal.org> wrote:
>> Hi,
>> on Linux with FPC 3.2.2 the executable size of programs compiled with
>> fpc -On -a (tried with n 2 or 4)
>> is smaller than when the assembler files are deleted (-a omitted).
>> Does it is an expected behaviour?
> Using any of the -a options (not sure about -a5?) to output assembly also
> automatically switches to an external linker (for targets with internal
> linkers).  Differences in the executables are thus attributable to
> differences in generated output between the internal and external linkers.

The internal ELF linker isn't enabled by default.

But using -a switches to the external assembler instead of the internal one
and there the same point holds true that slightly different binary files
are generated.


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