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Bug 219

Summary: X11 detection is broken on Mac OS X
Product: SDL Reporter: Anders F Bj <afb>
Component: buildAssignee: Ryan C. Gordon <icculus>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2    
Version: HG 1.2   
Hardware: PowerPC   
OS: Mac OS X (All)   

Description Anders F Bj 2006-05-09 07:08:53 UTC 
It seems that the autotools discovery of X11 isn't working with the setup that the Apple X11 has, since it doesn't find the correct paths/settings without guidance.


The first curveball is that the symlink /usr/include/X11 -> ../X11R6/include/X11 messes with the "includes" detection, the second is when it fails to see GLX.

Here are the results from ../configure:
checking for X... libraries /usr/X11R6/lib, headers 
checking for OpenGL (GLX) support... no

And here is what you get when you help it:
checking for X... libraries /usr/X11R6/lib, headers /usr/X11R6/include
checking for OpenGL (GLX) support... yes


But I had to use an explicit workaround to make it see the proper config:
CFLAGS="-O2 -g -pipe -I/usr/X11R6/include" ../configure --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib

I think it should be possible to tweak the autotools so that it can configure the available libraries ? Like add the x-includes to the GLX test program ?
Comment 1 Sam Lantinga 2006-05-10 01:19:03 UTC 
This is fixed in subversion, thanks!
Comment 2 Anders F Bj 2006-05-10 04:39:44 UTC 
# /opt/local/bin/svn update  
?\195?\132r p?\195?\165 revision 2373.
# ./autogen.sh                                                                                    
Generating build information using autoconf
This may take a while ...
Now you are ready to run ./configure
# cd cocoa-build
# ../configure --enable-video-cocoa --disable-video-carbon
[...]
checking for X... libraries /usr/X11R6/lib, headers 
checking for OpenGL (GLX) support... no
[...]

i.e. No difference, as far as I can tell ? (reopening bug)
Comment 3 Anders F Bj 2006-05-10 04:46:19 UTC 
"No difference" wasn't fair, this worked:
../configure --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib


So now it's more a matter of getting autoconf to understand that
/usr/include/X11 is a symlink, and that it needs to dig deeper
in order to get the *real* location of the other X11 headers...

Adding a hardcoded default for Darwin isn't unreasonable,
I have *no* idea why they include a symlink for "X11" -
but do not include a symlink for "GL" ? (to the OpenGL fw)
Comment 4 Sam Lantinga 2006-05-10 10:58:59 UTC 
Added hardcoded /usr/X11R6 path so GLX detection works.