Comment 5 for bug 303232
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| Catalin Marinas (catalin-marinas) wrote | #5 |
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1b1ed1a
(Get the code!)
By default, gcc generates software floating point, so for this particular case no additional command line options are needed.
Using -mfloat-abi=softfp indeed creates binaries compatible with Debian (soft-float) since the function calling convention uses standard registers and stack for passing floating point arguments rather than VFP registers.
The VFP (hard-float) instructions are not emulated by the kernel (only the older FPA but they are no longer used by Debian armel), though much of the support for emulation is already in there. Currently, the kernel generates a SIGILL if such VFP instruction is encountered and the CPU doesn't support it.