Options to output the preprocessor code

Options to output the preprocessor code

[mindentropy]

Hi,

Is there an option to generate preprocessor output while building the
QEMU code? It makes it easier to understand some of the macro template
function generation.

-Gautam.

Re: Options to output the preprocessor code

[Pierrick Bouvier]

Hi Gautam,

On 6/28/25 3:18 AM, mindentropy wrote:
> Hi,
> 
> Is there an option to generate preprocessor output while building the
> QEMU code? It makes it easier to understand some of the macro template
> function generation.
> 
> -Gautam.
> 

You can get verbose command for building by using make V=1, or ninja -v, 
depending which command you like to use.

Then, you can get a preprocessed output by using '-E' gcc option.
Don't forget to remove -o option, emitting the object file (or replace 
path).

Regards,
Pierrick

Re: Options to output the preprocessor code

[mindentropy]

On Tue, Jul 1, 2025 at 12:27 AM Pierrick Bouvier
<pierrick.bouvier@linaro.org> wrote:
>
> You can get verbose command for building by using make V=1, or ninja -v,
> depending which command you like to use.
>
> Then, you can get a preprocessed output by using '-E' gcc option.
> Don't forget to remove -o option, emitting the object file (or replace
> path).

Is there a Make rule to just generate the preprocessor output?

Re: Options to output the preprocessor code

[Pierrick Bouvier]

On 6/30/25 12:23 PM, mindentropy wrote:
> On Tue, Jul 1, 2025 at 12:27 AM Pierrick Bouvier
> <pierrick.bouvier@linaro.org> wrote:
>>
>> You can get verbose command for building by using make V=1, or ninja -v,
>> depending which command you like to use.
>>
>> Then, you can get a preprocessed output by using '-E' gcc option.
>> Don't forget to remove -o option, emitting the object file (or replace
>> path).
> 
> Is there a Make rule to just generate the preprocessor output?

No, you need to find the command for the associated file you want, and 
manually add the -E parameter.