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__hardfp_xxx symbols not found by gcc linker

I am working on a project where a static library is built with the ARM tool chain using the hard-float abi, and then is linked with other object files (generated with gcc). The linker is the gcc linker, and the linking stage takes place on a Raspberry pi. Currently everything works fine as long as the C code built with the ARM tool chain is fixed-point. But the gcc linker complains about undefined symbols of the form __hardfp_xxx (e.g. hardfp_pow) when the C dode built with the ARM tool chain uses floating-point. It looks like I am missing a library on the gcc side. Can anyone please point me to which library it might be? How are these __hardfp_xxx symbols handled by the gcc linker?

Thank you.