> On 2021-01-29, at 12:40, Ken Cunningham
> wrote:
>
> I was working on an Xcode project in the Xcode GUI the other day (Apple's
> ld64-530) and needed various parts that I know MacPorts supplies.
>
>
> But it is not simple or intuitive to know how to add headers and libraries
> from MacPorts to an Xcode project, I found.
>
>
> I did see how to add header search paths (that was not trivially easy to
> find, but could be found), but I had to add "/opt/local/include" which
> brought in everything from MacPorts, rather than just the bit I wanted. And
> then there are the libraries, and then the install_names will be all wrong.
>
You should have /opt/local/include as one of the header search paths if you
intend to link with a dylib that is in /opt/local/lib. But then you must also
have the correct rpath in the binary too.
>
> So, as I was working through this I thought -- in 20 years, this must have
> come up many times -- where is the wiki page on how to do this? And -- there
> must be many people out there who use Xcode all day long who know how to make
> this work smoothly much better than I do.
>
>
> Does anyone have the recipe for happy use of MacPorts headers and libraries
> in an Xcode GUI project?
You can add /opt/local/Library/Frameworks as one of the Framework search paths.
Not required but you should have /opt/local/lib as a library lookup path.
These last two are not required if you link only in the following way:
When you go to the project settings, you can click on 'Build Phases' and then
under 'Link Binary With Libraries', click the + button and add frameworks from
/opt/local/Library/Frameworks and dylibs from /opt/local/lib. In the dialog, on
the bottom left, choose Add Other then Add Files. Then hit Command+Shift+G and
type /opt/local. Browse to find the library (dylib)/framework you want to add.
The resulting binary should have commands similar to (otool -l):
Load command 36
cmd LC_RPATH
cmdsize 48
path /opt/local/Library/Frameworks (offset 12)
For any directly linked framework:
Load command 33
cmd LC_LOAD_DYLIB
cmdsize 64
name @rpath/Commandant.framework/Commandant (offset 24)
time stamp 2 Wed Dec 31 19:00:02 1969
current version 1.0.0
compatibility version 1.0.0
And possibly:
Load command 77
cmd LC_RPATH
cmdsize 32
path /opt/local/lib (offset 12)
I've patched many projects to use frameworks from MacPorts, most recently mas:
https://github.com/Tatsh/ports/tree/master/sysutils/mas
Andrew
