CMake Warning: Manually-specified variables were not used by the project: CMAKE_EXPORT_NO_PACKAGE_REGISTRY CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::equalTo(valijson::adapters::Adapter const&, bool) const [clone .constprop.1079]': test_package.cpp:(.text+0x417): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text+0x464): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text+0x479): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text+0x606): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text+0x614): undefined reference to `bool picojson::value::is() const' CMakeFiles/test_package.dir/test_package.cpp.o:test_package.cpp:(.text+0x6a0): more undefined references to `bool picojson::value::is() const' follow CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::equalTo(valijson::adapters::Adapter const&, bool) const [clone .constprop.1079]': test_package.cpp:(.text+0xbbc): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::isDouble() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8isDoubleEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8isDoubleEv]+0x9): undefined reference to `bool picojson::value::is() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::isInteger() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9isIntegerEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9isIntegerEv]+0x5): undefined reference to `bool picojson::value::is() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::isNumber() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8isNumberEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8isNumberEv]+0xe): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8isNumberEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8isNumberEv]+0x2d): undefined reference to `bool picojson::value::is() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::getInteger(long&) const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE10getIntegerERl[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE10getIntegerERl]+0xf): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE10getIntegerERl[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE10getIntegerERl]+0x1e): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::getInteger() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE10getIntegerEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE10getIntegerEv]+0x20): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE10getIntegerEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE10getIntegerEv]+0x85): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::maybeString() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE11maybeStringEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE11maybeStringEv]+0x1b): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE11maybeStringEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE11maybeStringEv]+0x3d): undefined reference to `bool picojson::value::is() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::maybeDouble() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE11maybeDoubleEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE11maybeDoubleEv]+0x33): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE11maybeDoubleEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE11maybeDoubleEv]+0x95): undefined reference to `bool picojson::value::is() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::maybeBool() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9maybeBoolEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9maybeBoolEv]+0x2f): undefined reference to `bool picojson::value::is() const' CMakeFiles/test_package.dir/test_package.cpp.o:test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9maybeBoolEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9maybeBoolEv]+0x95): more undefined references to `bool picojson::value::is() const' follow CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::asString(std::string&) const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringERSs[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringERSs]+0x195): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::getNumber(double&) const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberERd[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberERd]+0x29): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberERd[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberERd]+0x8f): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberERd[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberERd]+0xb5): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberERd[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberERd]+0xc2): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::getNumber() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberEv]+0x38): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberEv]+0x9b): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberEv]+0x137): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9getNumberEv]+0x148): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::asString() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringEv]+0x5b): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringEv]+0x6c): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringEv]+0x151): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asStringEv]+0x225): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::asDouble(double&) const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleERd[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleERd]+0x15): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleERd[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleERd]+0x22): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleERd[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleERd]+0x75): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleERd[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleERd]+0x84): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::asDouble() const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleEv]+0x23): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleEv]+0x49): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleEv]+0xf2): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleEv[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE8asDoubleEv]+0x103): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::asInteger(long&) const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9asIntegerERl[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9asIntegerERl]+0x16): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9asIntegerERl[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9asIntegerERl]+0x45): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9asIntegerERl[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE9asIntegerERl]+0x54): undefined reference to `long const& picojson::value::get() const' CMakeFiles/test_package.dir/test_package.cpp.o: In function `valijson::adapters::BasicAdapter, valijson::adapters::PicoJsonObject, valijson::adapters::PicoJsonValue>::equalTo(valijson::adapters::Adapter const&, bool) const': test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE7equalToERKNS0_7AdapterEb[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE7equalToERKNS0_7AdapterEb]+0xad): undefined reference to `bool picojson::value::is() const' test_package.cpp:(.text._ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE7equalToERKNS0_7AdapterEb[_ZNK8valijson8adapters12BasicAdapterINS0_15PicoJsonAdapterENS0_13PicoJsonArrayESt4pairISsS2_ENS0_14PicoJsonObjectENS0_13PicoJsonValueEE7equalToERKNS0_7AdapterEb]+0x2d5): undefined reference to `bool picojson::value::is() const' collect2: error: ld returned 1 exit status make[2]: *** [bin/test_package] Error 1 make[1]: *** [CMakeFiles/test_package.dir/all] Error 2 make: *** [all] Error 2 [HOOK - conan-center.py] pre_export(): WARN: [HEADER_ONLY, NO COPY SOURCE (KB-H005)] This recipe is a header only library as it does not declare 'settings'. Please include 'no_copy_source' to avoid unnecessary copy steps valijson/0.3: WARN: This conanfile has no build step ERROR: valijson/0.3 (test package): Error in build() method, line 12 cmake.build() ConanException: Error 2 while executing cmake --build '/home/conan/w/cci_PR-3304/1/5181ff7c-17db-4603-a201-60b525058e31/recipes/valijson/all/test_package/build/dfae4d6ba682b8d9c5630c4c912db585c2a46c64' '--' '-j3'