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LLVM/Clang compiler for MinGW

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killerbot:
on your instructions for building libcxx :

--- Code: ---mkdir build-release
cd  build-release  <======================
cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release ..

--- End code ---

killerbot:
build and installed clang and libc++ with your instructions, then let CB autodetect it, it finds it in /usr/local/clang.

But when trying a "hello world" , it fails to compile since it doesn't ind the headers (iostream).
What should be the correct location ?
Timestamps wise I think this was a result of the build too : /usr/local/include/c++/v1/ ? => when using this , compiles but now linker problems (eg . :  main.cpp:4: undefined reference to `std::__1::cout')

Also my linux shell doesn't seem to know  about clang (yet), though I did ldconfig, and /usr/local/bin is already in my path (this is also where codeblocks executable is).

EDIT : on the linking problem : added to Cb for clang compiler settings :
linker path : /usr/local/lib
link lib : c++

==> links but at run time :  error while loading shared libraries: libc++.so.1: cannot open shared object file: No such file or directory

eranif:
I forgot to mention that you will need libc++abi as well.., building it on linux does not work "out-of-the-box" but requires a small tweak:

First, checkout libcxxabi:


--- Code: --- svn co http://llvm.org/svn/llvm-project/libcxxabi/trunk libcxxabi
--- End code ---

Next:

--- Code: ---cd libcxxabi/lib

--- End code ---

Now you need to add some include paths... otherwise it will not compile:
run:

--- Code: --- g++ -v  -x c++ /dev/null -fsyntax-only
--- End code ---

Locate the output line which is similar to this:

--- Code: ---/usr/lib/gcc/x86_64-linux-gnu/4.7/include
--- End code ---

Adjust CXX environment variable so it will be something similar to this:

--- Code: ---export CXX='clang++ -I/usr/local/include/c++/v1 -I/usr/lib/gcc/x86_64-linux-gnu/4.7/include'
--- End code ---
and compile libcxxabi by simply typing:

--- Code: ---./buildit
--- End code ---

once the compilation is done, you should have a new lib: libc++abi.so.1.0
I could not find a simple way of installing so I copied it manually to /usr/local/lib and created 2 symlinks:


--- Code: ---ln -sf /usr/local/lib/libc++abi.so.1.0 /usr/local/lib/libc++abi.so
ln -sf /usr/local/lib/libc++abi.so.1.0 /usr/local/lib/libc++abi.so.1

--- End code ---

Now compiling with clang++/libc++ should be like this:


--- Code: ---clang++ -stdlib=libc++ -c test.cpp -I/usr/local/include/c++/v1
clang++ -stdlib=libc++ test.o -o TestMe -lc++ -lc++abi -I/usr/local/include/c++/v1/
--- End code ---

Eran

killerbot:
Thanks Eran, but not yet ok for me :


--- Code: ---error while loading shared libraries: libc++abi.so.1: cannot open shared object file: No such file or directory

--- End code ---

eranif:
Did you remember to add /usr/local/lib to LD_LIBRARY_PATH?


--- Code: ---export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
--- End code ---

In addition, note that you should create 2 symlinks


--- Code: ---ln -sf /usr/local/lib/libc++abi.so.1.0 /usr/local/lib/libc++abi.so
ln -sf /usr/local/lib/libc++abi.so.1.0 /usr/local/lib/libc++abi.so.1
--- End code ---

Eran

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