Shared library size anomaly

[Andreas Schwab]

Bryce McKinlay <bryce@mckinlay.net.nz> writes:

> Here's something weird that I noticed while messing around with the merge
> patch. A libgcj.so created by:
>
> $ ld -r -o temp.o (all object files...)
> $ gcj --shared temp.o -o libgcj.so
>
> is some 400K smaller than one created with:
>
> $ gcj --shared -o libgcj.so (all object files...)
>
> Each of the libraries works fine. Examining with objdump revealed that
> almost all the sections had slightly different sizes, however .rodata
> seems to be accounting for most of the discrepancy:
>
> - 11 .rodata       000a0599  005c6440  005c6440  005c6440  2**5
> + 11 .rodata       000f776b  005ca1e0  005ca1e0  005ca1e0  2**5
>                     CONTENTS, ALLOC, LOAD, READONLY, DATA
>
> Any clues what would cause this? Could this be a constant merging bug?

Try examining the linker map (generated by passing -Map=file to the
linker).

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
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