libtool: warning: 'Foo.o' has no symbols on Xcode 26.4

Developer Tools & Services Xcode
yonator OP
Created 3d
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I've recently installed Xcode 26.4, and it seems like all of our libraries now give multiple linker error when building of the format libtool: warning: 'Foo.o' has no symbols

Most of these errors come from extensions over objc types written in objc. (for instance we have some extensions over NSArray in the file NSArray+NSSet.mm)

Is that a new feature of some stricter libtool invocation? or a bug? should I do anything about it?

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DTS Engineer OP
Apple
2d
it seems like all of our libraries

These are static libraries, right?

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libtool: warning: 'Foo.o' has no symbols on Xcode 26.4
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