Why eh_frame sections in libgcc.a?

Why eh_frame sections in libgcc.a?

[Stefan Bylund]

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When building GCC 3.2 for powerpc-eabi, ".eh_frame" exception handling sections
are generated in libgcc.a for the following objects:

_divdi3.o
_moddi3.o
_udivdi3.o
_umoddi3.o
_udiv_w_sdiv.o
_udivmoddi4.o
unwind-dw2.o
unwind-dw2-fde.o

I can understand why such sections are generated for unwind-dw2.o and
unwind-dw2-fde.o which are used by libstdc++.a and libsupc++.a but why are they
generated for the other integer division related objects? Is there support for
throwing C++ exceptions when dividing by zero? What happens with such support in
a plain C application? Are these ".eh_frame" sections in libgcc.a unused and
harmless when compiling a plain C application and linking it with libgcc.a?

/Stefan


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