Headless library linked to wrong directory. Quits OpenEmu without errors.

dvessel commented 2 years ago

mamearcade_headless.dylib does not get picked up within the core plugin. I had to manually place it in /usr/local/lib/mamearcade_headless.dylib for MAME to launch.

This is from an ARM build on Monterey with Xcode 13.4.1.

dvessel commented 1 year ago

I found a work around.

In the build phase script I had to add all these parent paths.

install_name_tool -change ../../../../../mamearcade_headless.dylib @rpath/mamearcade_headless.dylib ${TARGET_BUILD_DIR}/${EXECUTABLE_PATH}

When mamearcade_headless.dylib is built, it gets baked into the dylib and the MAME binary inherits it. It can be inspected with otool.

otool -l mamearcade_headless.dylib
…
Load command 4
          cmd LC_ID_DYLIB
      cmdsize 72
         name ../../../../../mamearcade_headless.dylib (offset 24)
   time stamp 1 Wed Dec 31 19:00:01 1969
      current version 0.0.0
compatibility version 0.0.0
...

I have no clue why the path is formed that way. Searching for a fix landed me on this page and I figured out the rest. http://clarkkromenaker.com/post/library-dynamic-loading-mac/

EDIT: A better workaround is to use install_name_tool after compiling the mame dylib with install_name_tool -id mamearcade_headless.dylib mamearcade_headless.dylib. No need to change the build phase command in Xcode.

clobber commented 1 year ago

Yep, we're aware of this issue and as you can tell use install_name_tool to resolve. I've noted this in the README https://github.com/OpenEmu/UME-Core/commit/54fd07c8513f626fa957109e7483d1636eec45da

OpenEmu / UME-Core

Headless library linked to wrong directory. Quits OpenEmu without errors. #17