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CMakeLists.txt: check for atomic library #765

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CMakeLists.txt: check for atomic library #765

wants to merge 1 commit into from

Commits on Dec 27, 2019

  1. CMakeLists.txt: check for atomic library 

    On some architectures, atomic binutils are provided by the libatomic
library from gcc. Linking with libatomic is therefore necessary,
otherwise the build fails with:

[100%] Linking CXX executable leveldbutil
/home/fabrice/buildroot/output/host/opt/ext-toolchain/bin/../lib/gcc/sparc-buildroot-linux-uclibc/7.4.0/../../../../sparc-buildroot-linux-uclibc/bin/ld: libleveldb.a(env_posix.cc.o): in function `leveldb::(anonymous namespace)::Limiter::Acquire()':
env_posix.cc:(.text+0x124): undefined reference to `__atomic_fetch_sub_4'

This is often for example the case on sparcv8 32 bit.

Fixes:
 - http://autobuild.buildroot.org/results/01d5a50581ac9e9b46f40e6f9665f74897db5e6f

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
    @ffontaine
    ffontaine committed Dec 27, 2019
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