[llvm-dev] Clang includes search path

don hinton via llvm-dev llvm-dev at lists.llvm.org
Mon Oct 12 09:00:54 PDT 2015

I think the libc++ folks recommend building libc++ along with clang.  If
you do that, the c++ includes files will get copied under the relative
include path and will be found automatically.  However, you'll need to set
DYLD_LIBRARY_PATH in order to pick up the correct, just built, libc++

But if you really do want to use the installed version of libc++, you can
use xcrun to dynamically find the path via xcrun and set CPLUS_INCLUDE_PATH.

$ export CPLUS_INCLUDE_PATH=$(dirname $(xcrun -f clang))/../include/c++/v1

On Mon, Oct 12, 2015 at 10:13 AM, Rinaldini Julien via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi,
> I’m trying to set the includes search path in clang, but I can’t figure
> out how to do it?
> I’m working on OSX and every time I compile a C/C++ code, I have to
> specify it with -isysroot (and I don’t want an alias, or a symlink to
> /usr/include) since the includes are not in a really standard path on OSX
> (e.g.:
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++).
> Is there a way to do that?
> Thx
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> llvm-dev at lists.llvm.org
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