RE: arm bsps: changing the float-abi to softfp
> There is a means if someone wants to update gcc-common-1.cfg to allow user > macro maps. [...] Thanks, Chris. I'll investigate this. Kind regards Ingolf ___ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
RE: arm bsps: changing the float-abi to softfp
Hi Sebastian. > Why would you use > this instead of -mfloat-abi=hard? For a statically linked executable > this makes little sense. My goal is to link with a 3rd party object file which had been compiled with -mfloat-abi=softfp and which cannot be recompiled. In fact, there are also other flags which might cause a conflict with the current flags used by RTEMS and which might cause even more headache (-mfpu comes to my mind). > If you really need such a multilib, then you can patch > gcc/config/arm/t-rtems. I don't know if you can add custom patches to > the RTEMS Source Builder. I assume that I could add them to the corresponding config/tools/*.cfg. Kind regards Ingolf ___ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
Re: arm bsps: changing the float-abi to softfp
On 5/4/2023 4:11 am, Sebastian Huber wrote: > If you really need such a multilib, then you can patch > gcc/config/arm/t-rtems. I > don't know if you can add custom patches to the RTEMS Source Builder. There is a means if someone wants to update gcc-common-1.cfg to allow user macro maps. 1. User patch or source macro map Create a user macro map. Examples can be found here: https://git.rtems.org/rtems-source-builder/tree/rtems/config/snapshots 2. Update gcc-common-1.cfg to select user macro maps Update: https://git.rtems.org/rtems-source-builder/tree/source-builder/config/gcc-common-1.cfg with suitable selects. For example: https://git.rtems.org/rtems-source-builder/tree/source-builder/config/gcc-4.7-1.cfg I suggest: %select gcc-user %select newlib-user ... 3. Provide your macros to the set builder command using --macros. You can also set the environment variable `RSB_MACROS` or create a file called $HOME/.rsb_macros. It has been many years since I have used and tested this. Chris ___ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
Re: arm bsps: changing the float-abi to softfp
Hello Ingolf, the -mfloat-abi=softfp instructs the compiler to emit floating-point instructions if other machine options specify a FPU. Why would you use this instead of -mfloat-abi=hard? For a statically linked executable this makes little sense. You still have to take care of the FPU context during context switches and interrupt processing. If you really need such a multilib, then you can patch gcc/config/arm/t-rtems. I don't know if you can add custom patches to the RTEMS Source Builder. -- embedded brains GmbH Herr Sebastian HUBER Dornierstr. 4 82178 Puchheim Germany email: sebastian.hu...@embedded-brains.de phone: +49-89-18 94 741 - 16 fax: +49-89-18 94 741 - 08 Registergericht: Amtsgericht München Registernummer: HRB 157899 Vertretungsberechtigte Geschäftsführer: Peter Rasmussen, Thomas Dörfler Unsere Datenschutzerklärung finden Sie hier: https://embedded-brains.de/datenschutzerklaerung/ ___ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
arm bsps: changing the float-abi to softfp
Hi, we are currently using the RTEMS source builder to build the toolchain, RTEMS and a few BSPs for ARM (32bit) targets. Apparently, RTEMS generally uses -mfloat-abi=hard for all arm32 targets. Can this easily be changed to compile with -mfloat-abi=softfp instead? Or extend the multilib build to include also softfp variants? No "clean" solution expected which is ready for inclusion in rtems.org -- just a pointer to the relevant files which would have to be patched. Kind regards Ingolf ___ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
