[fpc-devel] Public access of FPC features and settings

[Michael Ring]

Florian, it seems you missed a comment on that topic I wrote a while ago.

There is also the need to have a tuple that matches controllertype to 
controllerunit to get rid of a big peace of duplicated code from 
cpuinfo.pas in lazarus.

Lazarus needs to know which unit to include so that codetools can do 
their magic. In current implementation parts of controllertypes are 
duplicated in lazarus code.


To get rid of this lazarus will not only need to know the available 
controllertypes, it will also need to have the mapping from 
controllertype tu unitname like this:

<controllertype name="NUCLEOF103RB" unit="STM32F103RB" />*
*

in the xml.

Example:

~/fpcupdeluxe-test/fpc/bin/aarch64-darwin/fpc -Tembedded -Parm -ix

<?xml version="1.0" encoding="utf-8"?>
<fpcoutput>
   <info>
     <ostargets>
...

    </ostargets>
     <cpuinstructionsets>
...

    </cpuinstructionsets>
     <fpuinstructionsets>
...

    </fpuinstructionsets>
     <abis>
...

    </abis>
...

    <optimizations>

     </optimizations>
     <wpoptimizations>
...

    </wpoptimizations>
     <modeswitches>
...

    </modeswitches>
     <asmmodes>
...

    </asmmodes>
     <controllertypes>

*...*

*     <controllertype name="NUCLEOF103RB" unit="STM32F103RB" />**
*...

     </controllertypes>
     <features>
...

    </features>
     <codegeneratorbackend>FPC</codegeneratorbackend>
   </info>
</fpcoutput>


Am 02.04.21 um 15:07 schrieb Michael Van Canneyt via fpc-devel:
>
>
> On Fri, 2 Apr 2021, Florian Klämpfl via fpc-devel wrote:
>
>>
>>
>>> Am 07.03.2021 um 15:12 schrieb Florian Klämpfl via fpc-devel 
>>> <fpc-devel at lists.freepascal.org>:
>>>
>>> Am 07.03.21 um 12:05 schrieb Alfred via fpc-devel:
>>>> Hello,
>>>> As a follow-up on a Lazarus feature request.
>>>> Among other applications, Lazarus uses some hard-coded list that 
>>>> represent FPC features. Like supported MCU and boards. It would be 
>>>> (much) more convenient to parse the FPC output itself to supply 
>>>> this info. And that could be made easy by using XML as FPC output.
>>>> Besides the above, I would welcome more features to be available 
>>>> through FPC itself.
>>>> FPC uses system files, located in "compiler/systems". With all 
>>>> kinds of settings. Like alignment and calling convention and linker 
>>>> to use.
>>>> FPC uses search-paths. Some user defined through fpc.cfg, some 
>>>> build-in. See all -F... compiler settings.
>>>> It would be nice to be able to get info through FPC itself about 
>>>> these settings and paths.
>>>> As maintainer of fpcupdeluxe, often I need to parse fpc.cfg by 
>>>> hand. Or look into a file like fpmkunit.pp to find the valid FPC 
>>>> targets. Or parse the Makefile to find all available subarchs when 
>>>> building a cross-compiler.
>>>> For a start, I would favor a XML/JSON output of fpc -i. Would be 
>>>> very nice to use its output.
>>>
>>> I added a first experimental implementation in r48897. It does not 
>>> cover full -i, so far only to show how it could look like. Any 
>>> comments?
>>
>> Meanwhile I completed it.
>>
>> So if somebody thinks it’s useful, the json output can be added as well.
>
> Will do, thanks!
>
> Michael.
>
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