Modules using the default FP ABI (no floating-point) can be linked with any other (singular) FP ABI variant.
Special compatibility support exists for O32 with the four double-precision FP ABI variants. The -mfpxx FP ABI is specifically designed to be compatible with the standard double-precision ABI and the -mfp64 FP ABIs. This makes it desirable for O32 modules to be built as -mfpxx to ensure the maximum compatibility with other modules produced for more specific needs. The only FP ABIs which cannot be linked together are the standard double-precision ABI and the full -mfp64 ABI with -modd-spreg.