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I've got a library (Google's protobuf, FWIW) which requires a certain compile-time flag if it's been built into a shared library. However, if it's been built into a static library, then it mustn't have the flag.

pkg-config files have a Cflags property, which contains the cflags an application should use when using both the static and shared version of the library, and a Cflags.private property, which is only for static libraries.

Cflags: -DUSED_FOR_BOTH
Cflags.private: -DUSED_ONLY_FOR_STATIC

But I can't find a property which is only applied to shared libraries --- i.e. somewhere where I'd put the -DUSED_ONLY_FOR_SHARED. Have I missed something, or is this simply not doable?

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  • The command $ pkg-config -cflags -libs protobuf outputs -lprotobuf and $ pkg-config -cflags -libs -static protobuf outputs -lprotobuf -lz. So it's unclear why you say that protobuf "requires a certain compile-time flag if it's been built into a shared library. However, if it's been built into a static library, then it mustn't have the flag." Best if you describe your problem concretely. Commented Sep 29 at 9:39
  • Most likely you're using a different platform than the one I am; but that's not really important, as the question's about the .pc file syntax, not protobuf. Commented Sep 29 at 14:23
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