Xlib.h not found when building graphviz on Mac OS

问题:

When using homebrew to install graphviz, the script gets to the point of "Making install in tkstubs" and then throws the following fatal error:

In file included from tkStubLib.c:15:
/usr/include/tk.h:78:11: fatal error: 'X11/Xlib.h' file not found
#include <X11/Xlib.h>

I have installed XQuartz as X11 has been dropped in Mountain Lion, but I'm unsure if it is installed correctly. The location of Xlib.h is:

/opt/X11/include/X11/Xlib.h

There are also two symlinks to /opt/X11, they are:

/usr/X11
/usr/X11R6

Does this look like the correct setup to you? I've never dealt with X11 or XQuartz until yesterday.

Cheers.

回答1:

You need to tell the tkstubs build (and possibly other bits in the package as well) to look for headers in /opt/X11/include; this is not on the standard include path.

Usually this is achieved by passing -I/opt/X11/include as an additional compiler flag, the method to do so is however dependent on the build system.

For reasonably modern configure scripts, the best approach is to pass it in the environment variable CPPFLAGS; if the package uses another build system or this doesn't work for another reason, then you need to look at the Makefile in the build directory.

回答2:

After installing XQuartz you may add a symlink to your X11 installation folder by just entering

ln -s /opt/X11/include/X11 /usr/local/include/X11

in terminal. That will fix the problem as well without changing any ruby script.

回答3:

You can enter in your shell before the compile/link (or brew) command:

  export CPPFLAGS=-I/opt/X11/include

The export line will tell the compile/linker to look in /opt/X11/include for the X11 include files

回答4:

Had the same issue and running this command on terminal

xcode-select --install 

worked for me. Run this command after installing xQuartz.

回答5:

If you need this to work in your CMake builds:

if(APPLE)
   include_directories(AFTER "/opt/X11/include")
endif()

That worked well for me.

回答6:

I got it to install by copying the x11 header file directory to the /opt/local/include directory. Probably not the best way to work around it but quick and easy.

回答7:

Since the make file is looking for X11/xlib.h i.e., it is looking for X11 folder in the current directory, one way to solve this problem is to simply copy the /opt/X11/include/X11 directory to the directory that contains make file.

回答8:

I found this thread while trying to compile ffmpeg from source on OS X. I needed --enable-x11grab and the homebrew build does not support this option.

I had XQuartz installed already but I kept getting errors from ./configure: ERROR: Xlib not found. I thought the answers here would solve my problem, but they did not!

So, if anyone is ever in the same boat, my solution was this:

I opened up the generated config.log and found lots of errors referring to various includes and header files, including X11/Xlib.h - this is misleading. At the very bottom of the logfile was the key, pkg-config was complaining about looking for xbc.pc, and requested that it be put on the path. However, the error message that is displayed on the terminal says nothing about pkg-config or xbc!

The solution is to add to your PKG_CONFIG_PATH environment variable. Mine was nonexistent, so I just did export PKG_CONFIG_PATH=/opt/X11/lib/pkgconfig/ (the folder where I found xbc.pc).

I reran configure and everything worked like a charm!

TL;DR: check config.log - don't trust the terminal output!