pragma FUNCTION_OPTIONS on TMS470

Harald Hallen

I'm trying to use #pragma FUNCTION_OPTIONS when compiling C source code for a Cortex A8 using the compiler cl470, version 4.6.3. I get a warning, "unrecognized pragma" no matter how I format it.

What I want to do is to override the global optimization level for certain specific functions. I've tried the following:

#pragma FUNCTION_OPTIONS(funcName, "-O1")

#pragma FUNCTION_OPTIONS(funcName, "O1")

#pragma FUNCTION_OPTIONS(funcName, "--opt_level=1")

#pragma FUNCTION_OPTIONS(funcName, "opt_level=1")

None of these will work. Does the compiler not support the FUNCTION_OPTIONS pragma at all, or is it the option that I want to use that is not supported?

I must say I find TI's documentation sadly lacking both in detailing which options may be used and how the directive should be formatted. A simple example would have been useful.

over 14 years ago

0 Cody Addison over 14 years ago

TI__Expert 4540 points

Harald,

The FUNCTION_OPTIONS pragma is not supported in the 4.6 version of the compiler. You will need to use the 4.9 version to use the pragma. I agree that there should be more documentation on the supported options. I will address this for the next documentation update. Here are the supported options:

--opt_level
--auto_inline
--opt_for_speed
--code_state

0 Harald Hallen over 14 years ago in reply to Cody Addison

Prodigy 20 points

Thanks for the quick reply.

I assume that the correct format would include the dashes, like so:

#pragma FUNCTION_OPTIONS(funcName, "--opt_level=1")

Would it work OK with "-O1" as well? Please confirm.

0 Cody Addison over 14 years ago in reply to Harald Hallen

TI__Expert 4540 points

Yes. The short form of all options will work in the pragma.

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pragma FUNCTION_OPTIONS on TMS470