How to force clang to use some library by default?

Question

I build clang by clang against libc++, libc++abi, compiler-rt in the following steps:

• To download (and update)

Answer 1

There are a couple of workarounds have been suggested. I ended up with the following workaround:

mkdir build
cd build
# backup:
cp -vaf /usr/local/lib/libc++.{a,so.1.0} /usr/local/lib/libc++abi.{a,so.1.0} /usr/local/lib/libunwind.{a,so.1.0} .
clang -shared -fPIC -pthread -o fuse.so -Wl,--whole-archive libc++.a libc++abi.a libunwind.a -Wl,--no-whole-archive -ldl -lm
ar x libc++.a
ar x libc++abi.a
ar x libunwind.a
ar rc fuse.a *.o
sudo chown root:root fuse.*
sudo cp -vaf fuse.so /usr/local/lib/
sudo ln -svf /usr/local/lib/libc++.so.1 /usr/local/lib/fuse.so
sudo cp -vaf fuse.a /usr/local/lib/
sudo mv -vf /usr/local/lib/libc++.a /usr/local/lib/libc++.a.bak
sudo ln -svf /usr/local/lib/libc++.a /usr/local/lib/fuse.a

It merges all the libraries used (libc++, libc++abi and libunwind) into the one single *.a or *.so file. Then libc++.a and libc++.so are replaced with (links to) resulting assemblied files, saving a previous versions for possible backup.

It works perfectly for me.

But this is not the answer. Maybe someday clang will not have such a problem right from the box.