CCSV5 ARM and DSP compilers: ARM defaults to small enums, and the project option to switch to --enum_type=int doesn't work properly

Does the ARM core must have small enums always? enum_type=packed

Are large enums allowed? enum_type=int

Customer code can be compiled using large enums. However, configuring SYS/BIOS using configuro there seems to be no option for large enum configuration.

Thanks,

Thorsten

This seems like a BIOS issue of some sort.  You can build all of the source code you control with enum_type=int.  Can you do the same thing with BIOS supplied object files?  Maybe, or maybe not.  I'll draw the attention of some BIOS folks to this thread.  It may make sense to move this thread.

Thanks and regards,

-George

Thorsten --

The BIOS, IPC and XDC libs are compiled with default enum type.   So the problem is bigger than just the configuro-generated .c file.

Why does the customer need the enum size to be int?   Are they sharing some data structures with another processor?   I can probably help you recompile BIOS, etc. with enum type=int, but I think it'd be easier to support and maintain if you use the extra clarifier for the specific enums that need to have the int size.

-Karl-

Hi Karl,

Since several data structures are transported not only between the processors on the chip, but also to simulation frameworks on PC, enum_type=int is required.

The "trivial" fix manually modifying every single enum is not a good solution, since it requires manually hunting down every single instance in every relevant header.

I can't oversee how much work it is to rebuild all related packages and how TI is going to support this after re-compilation. Can you state whether this path is realistic?

For sure, even if we can re-compile to enum_type=int we need suport from BIOS team in case needed.

Tha nks for your involvement.

Thorsten

[1]  Use the custom build option and add the "--enum_type=int" to the BIOS.customCCOpts in your .cfg file:

BIOS.libType = BIOS.LibType_Custom;
BIOS.customCCOpts = "--neon --endian=little -mv7A8 --abi=eabi -q -ms --opt_for_speed=2  --program_level_compile -o3 -g --optimize_with_debug --enum_type=int";

BIOS.includeXdcRuntime = true;

The  "BIOS.includeXdcRuntime" configuration option will build the XDC RTS sources as part of this custom build.

[2]  If you are using NDK 2.21 or later, you can rebuild the ndk following the instructions on this wiki:

http://processors.wiki.ti.com/index.php/Rebuilding_The_NDK_Core_Using_Gmake

You will need to update ndk.bld file to include the --enum_type=int option. 

Change this line:

var armOpts = " -ms ";

to this:

var armOpts = " -ms --enum_type=int";

If you are using NDK 2.20, the build instructions are different and are summarized here:

http://processors.wiki.ti.com/index.php/Rebuilding_the_NDK_Core

[3]  finally, you need to update the config.bld file used by the configuro command to make sure that you have the --enum_type=1.  The attached slides show how to do this if you are using CCS.  If you are using command line or makefile for the configuro step, you should be able to add this to the command line.

4137.enum-int.ppt