Merge #89: pkgconfig: Drop -std=c++17 compile flag

590d1e7 pkgconfig: Drop -std=c++17 compile flag (Ryan Ofsky)

Pull request description:

  This compile flag was required previously when Bitcoin Core was using C++11, and libmultiprocess headers needed to be compiled with C++14 in order to be compatible with newer versions of Cap'n Proto. The flag was updated to C++17 since then.

  But now Bitcoin Core has been updated to use C++20 and having the C++17 flag causes errors when the std::u8string type is referenced in bitcoin code. So just remove the C++ flag and let the application be responsible for choosing the C++ version.

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Tree-SHA512: bfeb2f781509fe76f1a032551e0af8267968e7e4c80dff8b3b9cde03595616926cadae386dd4976d0ddf090cf7d9a18d0fcc66774260446d66ca16bc275b642f

Author: ryanofsky

pkgconfig/libmultiprocess.pc.in

@@ -9,4 +9,4 @@ Description: Multiprocess IPC library
 Version: 0.0
 
 Libs: -L${libdir} -lmultiprocess -L${capnp_prefix}/lib -lcapnp-rpc -lcapnp -lkj-async -lkj -pthread -lpthread
-Cflags: -std=c++17 -I${includedir} -I${capnp_prefix}/include -pthread
+Cflags: -I${includedir} -I${capnp_prefix}/include -pthread