Warning Message: “'pragma_reverse_bitfields' attribute directive ignored”

Description

The Nios II GCC 4 tool chain does not support the C compiler pragma and flag for reverse bit fields. If you try to use the compiler pragma reverse_bitfields, you see the following warning:

'pragma_reverse_bitfields' attribute directive ignored

Similarly, the C compiler flag -mreverse-bitfields is unsupported.

Resolution

Use the GCC 3 tool chain.