llvm dev - Oct 2015 - Clang includes search path

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

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++
library.

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
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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Hi!

I saw the CPLUS_INCLUDE_PATH variable in the code but wasn’t sure how to use it.
I’ll try that.

Thanks
> On 12 Oct 2015, at 18:00, don hinton <hintonda at gmail.com> wrote:
> 
> 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++ library.
> 
> 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
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>