Don't mix libsigrokcxx header files into the $prefix/include/libsigrok
directory. Use a separate $prefix/include/libsigrokcxx instead.
bindings_cxx_libsigrokcxx_la_LDFLAGS = $(SR_LIB_LDFLAGS)
-library_include_HEADERS += \
+bindings_cxx_libsigrokcxx_la_includedir = $(includedir)/libsigrokcxx
+bindings_cxx_libsigrokcxx_la_include_HEADERS = \
bindings/cxx/include/libsigrokcxx/libsigrokcxx.hpp \
bindings/cxx/include/libsigrokcxx/enums.hpp