What does libgcc_s.so contain?

Question

I tried running objdump on the lib to figure it out without success. Is there a way to find out what a library does?

objdump -T libgcc_s.so gives you the shared object linker points. Presuming you know what __gttf2 and the like mean, you should have no problem. (I expect that libgcc_s.so is atypically cryptic for an in this regard) — msw, Sep 9, 2010 at 12:18
Possible same on SO: stackoverflow.com/questions/9414625/do-i-really-need-libgcc — Ciro Santilli OurBigBook.com, Jun 8, 2015 at 11:11

Ciro Santilli OurBigBook.com · Accepted Answer · 2015-05-10 07:30:02Z

35

It's GCC's runtime library, which contains some low-level functions that GCC emits calls to (like long long division on 32-bit CPUs).

Part of this library is required by the LSB.

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answered Sep 9, 2010 at 11:17

Alex B

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1

+1 dumb old me, sometimes one just doesn't look in the obvious place
– celavek
Sep 9, 2010 at 14:32
2

do you happen to know if a specific processor's EABI(e.g. ARM EABI) is implemented in that lib?
– celavek
Sep 9, 2010 at 14:33
@celavek I'm not sure what you mean. AFAIK, current platform's ABI would be implemented, same as in other GCC runtime libs: gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html
– Alex B
Sep 10, 2010 at 0:14
2

What if you use clang instead of gcc, would it still be linked in?
– Bram
Oct 8, 2019 at 2:56
1

It can be, depending on the --rtlib= option to clang.
– Daira Emma Hopwood
Aug 10, 2020 at 14:29

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