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 09 '10 at 12:18
Possible same on SO: http://stackoverflow.com/questions/9414625/do-i-really-need-libgcc — Ciro Santilli OurBigBook.com, Jun 08 '15 at 11:11

score 35 · Accepted Answer · edited May 10 '15 at 07:30

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.

edited May 10 '15 at 07:30

answered Sep 09 '10 at 11:17

Alex B

1

+1 dumb old me, sometimes one just doesn't look in the obvious place – celavek Sep 09 '10 at 14:32
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do you happen to know if a specific processor's EABI(e.g. ARM EABI) is implemented in that lib? – celavek Sep 09 '10 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: http://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html – Alex B Sep 10 '10 at 00:14
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What if you use clang instead of gcc, would it still be linked in? – Bram Oct 08 '19 at 02:56
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It can be, depending on the --rtlib= option to clang. – Daira Hopwood Aug 10 '20 at 14:29

1 Answers1