I have an app that when using file, reports that it has 2 architectures in the Mach-O
iPad:~/map/MyApp.app root# file MyApp
MyApp: Mach-O fat file with 2 architectures
EDIT - I have also checked this with Xcode's tool
xcrun -sdk iphoneos lipo -info MyApp
Architectures in the fat file: MyApp are: armv7 arm64
When I use otool to locate the architectures, I can see I have 2, an ARMv7(cpusubtype 9) and a ARM64 (cpysubtype 0)
iPad:~/map/MyApp.app root# otool -arch all -Vh MyApp
MyApp (architecture cputype (12) cpusubtype (9)):
Mach header
magic cputype cpusubtype caps filetype ncmds sizeofcmds flags
MH_MAGIC ARM 9 0x00 EXECUTE 41 4760 NOUNDEFS DYLDLINK TWOLEVEL PIE
MyApp (architecture cputype (16777228) cpusubtype (0)):
Mach header
magic cputype cpusubtype caps filetype ncmds sizeofcmds flags
MH_MAGIC_64 16777228 0 0x00 EXECUTE 41 5368 NOUNDEFS DYLDLINK TWOLEVEL PIE
However when I try to use lipo to thin out the binary, I get the following error
iPad:~/map/MyApp.app root# lipo -thin armv7 MyApp -output ~/map/myappv7
-sh: /usr/bin/lipo: Bad CPU type in executable
Any ideas why I can't think out this particular binary? I did update my lipo binary as the previous one when used with armv7 said: no architecture of this type.
We had several issues we could not explain in the past with lipo, which all of them were no issue using Xcodes lipo.
Give it a try:
xcrun -sdk iphoneos lipo -thin armv7 MyApp -output ~/map/myappv7