you are missing the command line tools for OSX. Try running `xcode-select
--install` from the command line

On Sat, Nov 21, 2015 at 9:07 PM, Xue Fuqiao <xfq.free@gmail.com> wrote:

> On Sun, Nov 22, 2015 at 7:32 AM, Paul Eggert <eggert@cs.ucla.edu> wrote:
>
> Hi Paul,
>
> > Xue Fuqiao wrote:
> >>
> >> IIRC OS X already provides libxml2, so I don't need to install one.  But
> >> it seems that `make' cannot find `libxml/tree.h' in my header search
> >> path.  Can anyone point me in the right direction?
> >
> > I suggest looking in the file configure.ac for the strings "xcsdkdir"
> and
> > "libxml2", and checking src/Makefile for its LIBXML2_CFLAGS setting.
>
> Thanks for the hint!
>
> In configure.ac:
>
>    xcsdkdir=`$XCRUN --show-sdk-path 2>/dev/null`
>    [...]
>    LIBXML2_CFLAGS="-I'$xcsdkdir/usr/include/libxml2'"
>
> My $XCRUN is empty (I don't know why), therefore, in src/Makefile:
>
>    LIBXML2_CFLAGS = -I/usr/include/libxml2
>
> But I don't even have the /usr/include/ directory.  With GNU findutils
> (find / -regex '.*xml.*') I found that libxml2 is in
>
> /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.11.sdk/usr/include,
> instead of /usr/include/.
>
> What should I do now?  `sudo ln -s' looks like an ugly hack.  Any
> suggestions?
>
>