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gcc의 암관련 부분이거든요?

http://www.cis.ohio-state.edu/cgi-bin/info/info/gcc,ARM%20Options

`-msoft-float'
Generate output containing library calls for floating point.
*Warning:* the requisite libraries are not available for all ARM
targets. Normally the facilities of the machine's usual C
compiler are used, but this cannot be done directly in
cross-compilation. You must make your own arrangements to provide
suitable library functions for cross-compilation.

`-msoft-float' changes the calling convention in the output file;
therefore, it is only useful if you compile _all_ of a program with
this option. In particular, you need to compile `libgcc.a', the
library that comes with GCC, with `-msoft-float' in order for this
to work.
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