Hi Thomas, This is a very helpful suggestion. Since I am doing some cleanup these days, let me try this option and see how much we need to improve. I have created an task for tracking this: https://developer.trustedfirmware.org/T475

And, do you have an error report could be share? You can attch the log in the task if you do have some.

Thanks.

/Ken ________________________________ From: TF-M tf-m-bounces@lists.trustedfirmware.org on behalf of Thomas Törnblom via TF-M tf-m@lists.trustedfirmware.org Sent: Friday, August 16, 2019 4:24 PM To: tf-m@lists.trustedfirmware.org tf-m@lists.trustedfirmware.org Subject: [TF-M] Please enable -pedantic-errors for gcc builds

I'm now looking at compilation issues with our standards compliant compiler, and I run into one issue after another that are due to the use of non-standard C allowed by gcc and armclang.

Things like zero sized arrays, which are fairly easy to fix by making sure that they have at least one element, but there are other issues that may not be as easy to solve.

The latest issue is illegal pointer arithmetic on void * in the IPC code. --- ... [ 20%] Building C object app/secure_fw/CMakeFiles/tfm_s_obj_lib.dir/core/ipc/tfm_svcalls.o

msg->invec[invec_idx].base += bytes; ^ "C:\Users\thomasto\Projects\tf-m7\trusted-firmware-m\secure_fw\core\ipc\tfm_svcalls.c",595 Error[Pe852]: expression must be a pointer to a complete object type

msg->invec[invec_idx].base += num_bytes; ^ "C:\Users\thomasto\Projects\tf-m7\trusted-firmware-m\secure_fw\core\ipc\tfm_svcalls.c",666 Error[Pe852]: expression must be a pointer to a complete object type

tfm_memcpy(msg->outvec[outvec_idx].base + msg->outvec[outvec_idx].len, ^ "C:\Users\thomasto\Projects\tf-m7\trusted-firmware-m\secure_fw\core\ipc\tfm_svcalls.c",750 Error[Pe852]: expression must be a pointer to a complete object type ... ---

I suggest enabling "-pedantic-errors" for gcc, and also for clang, if it has a similar setting, to avoid having illegal C code creeping into tf-m.

Comments?

/Thomas --

*Thomas Törnblom*, /Product Engineer/ IAR Systems AB Box 23051, Strandbodgatan 1 SE-750 23 Uppsala, SWEDEN Mobile: +46 76 180 17 80 Fax: +46 18 16 78 01 E-mail: thomas.tornblom@iar.com mailto:thomas.tornblom@iar.com Website: www.iar.comhttp://www.iar.com http://www.iar.com Twitter: www.twitter.com/iarsystemshttp://www.twitter.com/iarsystems http://www.twitter.com/iarsystems -- TF-M mailing list TF-M@lists.trustedfirmware.org https://lists.trustedfirmware.org/mailman/listinfo/tf-m