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How to use the ALTERNATE_PERMISSIONS_FILES build setting?
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How to use the ALTERNATE_PERMISSIONS_FILES build setting?


  • Subject: How to use the ALTERNATE_PERMISSIONS_FILES build setting?
  • From: Bill Cheeseman <email@hidden>
  • Date: Thu, 25 Aug 2016 15:30:53 -0400

Apple's Cocoa framework header files have permissions 644, or u+w,go-w,a+r. All of the third-party framework header files I have ever examined have permissions 755, or u+w,go-w,a+rX, instead -- meaning that the headers are marked as executable. A number of online commentaries say that all framework header files should have permissions 644, as Apple's do, because headers are not executable, and that makes sense to me.

But I can't figure out how to configure the Xcode build settings for my own framework to accomplish this. I set the Deployment build setting ALTERNATE_MODE (Alternate Install Permissions) to u+w,go-w,a+r, instead of the default u+w,go-w,a+rX. But I haven't found a workable way to set the ALTERNATE_PERMISSIONS_FILES (Alternate Permissions Files) setting. This setting is supposed to contain the paths to the framework header files, but every way I have tried to construct the paths either accomplishes nothing or causes the build to fail because the header files aren't found.

Can anybody explain how to set ALTERNATE_PERMISSIONS_FILES to accomplish my goal?

(I assume I can fall back on a run script build phase calling CHMOD -- right? But I would like to know how to use the ALTERNATE_PERMISSIONS_FILES build setting, which seems to be designed specifically to do this sort of thing.)



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