How to detect if -gcc extensions enabled? ( #ifdef GCC ? )

Ed Sutton

My goal is to create a macro to byte pack data structures for portability between MSVC. In order to use the gcc packed attribute the ARM compiler must have the -gcc extensions enabled.

Is there a define I can test to determine if gcc extensions have been enabled?

I tried the following without success.

#ifdef GCC

#endif

Thanks in advance,

over 13 years ago

0 George Mock over 13 years ago

TI__Guru**** 253380 points

Please see the section titled Predefined Macro Names in the ARM compiler manual. There you will see that __TI_GNU_ATTRIBUTE_SUPPORT__ does what you need.

Thanks and regards,

-George

0 Ed Sutton over 13 years ago in reply to George Mock

Intellectual 885 points

Thank you George!

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How to detect if -gcc extensions enabled? ( #ifdef GCC ? )