Comment #5 on issue 449 by ltwar...@gmail.com: Link error while using
clang++ with -stdlib=libc++ flag in OSX
http://code.google.com/p/protobuf/issues/detail?id=449
Im doing this in Linux.
My configure:
./configure --prefix=/usr CC=clang CXX=clang++ CXXFLAGS="-O2
-stdlib=libc++" LIBS="-lc++ -lc++abi"
After compilation and installation:
ldd /usr/lib/libprotobuf.so
linux-vdso.so.1 (0x00007fffe4505000)
libpthread.so.0 => /usr/lib/libpthread.so.0 (0x00007fe3199ea000)
libz.so.1 => /usr/lib/libz.so.1 (0x00007fe3197d4000)
libc++abi.so.1 => /usr/lib/libc++abi.so.1 (0x00007fe319785000)
libc++.so.1 => /usr/lib/libc++.so.1 (0x00007fe3195f6000)
libm.so.6 => /usr/lib/libm.so.6 (0x00007fe3192f8000)
libc.so.6 => /usr/lib/libc.so.6 (0x00007fe318f4b000)
libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007fe318d35000)
/usr/lib/ld-linux-x86-64.so.2 (0x00007fe319d63000)
librt.so.1 => /usr/lib/librt.so.1 (0x00007fe318b2d000)
There is not libstdc++
Note: libc++ does not come with the ABI layer, that is why i'm linking also
libc++abi. This may be the cause that in Your case libstdc++ is still
pulled as a fallback to unresolved symbols, i think that this is the way
that FreeBSD guys did it or maybe You linker has some defaults.
Ps. The "string" case is the way to version libraries, in this case C++11
inline namespace feature is used.
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