How to force gcc to long-call a function (on MIPS)?

[PRC]

Here is my code

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typedef int (*MY_FUNC_ENTRY)(int) __attribute__(( far ));
...
((MY_FUNC_ENTRY)func_entry)(para);
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But gcc still generates 'jal ADDR' instead of 'jalr $reg' for this function call.
How to force gcc to generate 'jalr' for this call?