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Sat Jun 11 18:01:52 CEST 2011

Know your linker: how to avoid unused functions to end up in a binary.

Use the CFLAGS

  -ffunction-sections -fdata-sections

which will put functions in their own sections.  Together with the
linker option

  -Wl,--gc-sections

unused sections (functions or data) will be removed.  The only
downside is that using separate sections requires more space due to
alignment.

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