auscompgeek
commented
4 years ago Well that's awkward. The example Makefile doesn't set -std=c++17.
Adding CXXFLAGS ?= -std=c++17 would probably fix it.
Closed mddrouillard closed 4 years ago
auscompgeek
commented
4 years ago Well that's awkward. The example Makefile doesn't set -std=c++17.
Adding CXXFLAGS ?= -std=c++17 would probably fix it.
mddrouillard
commented
4 years ago many thanks.
I added the following to the Makefile (between DEPS_CFLAGS and DEPS_LIBS and it now builds.
DEPS_CFLAGS?=$(shell env PKG_CONFIG_PATH=/usr/local/frc/lib/pkgconfig pkg-config --cflags wpilibc) CXXFLAGS?=-std=c++17**** DEPS_LIBS?=$(shell env PKG_CONFIG_PATH=/usr/local/frc/lib/pkgconfig pkg-config - -libs wpilibc) EXE=multiCameraServerExample DESTDIR?=/home/pi/
Now how to figure out the rest of this.
Many Thanks AuscompGeek!
I may be missing a basic step, after booting a fresh image on the pi, finding the camera, saving the camera info so that the json is created, I ssh to the pi and cd to the
pi@frcvision(rw):~/examples/cpp-multiCameraServer$
directory.
As per the example instructions in README, I issue a simple make, but this is what happens... as a result I dont get a new executable that can be installed into place with make install.
Any ideas?
pi@frcvision(rw):~/examples/cpp-multiCameraServer$ make g++ -pthread -g -Og -c -o main.o -I/usr/local/frc/include -I/usr/local/frc/include/opencv -I/usr/local/frc/include main.cpp In file included from /usr/local/frc/include/wpi/ArrayRef.h:15, from /usr/local/frc/include/networktables/NetworkTableInstance.h:17, from main.cpp:13: /usr/local/frc/include/wpi/STLExtras.h:585:13: error: ‘optional’ in namespace ‘std’ does not name a template type -> std::optional<typename std::remove_const< ^() {}
^
In file included from main.cpp:17:
/usr/local/frc/include/wpi/json.h:250:40: error: ‘conjunction’ is not a member of ‘std’
std::conjunction<std::negation<std::is_same<void, CompatibleObjectType>>,
^
~~~ /usr/local/frc/include/wpi/STLExtras.h:585:8: note: ‘std::optional’ is only available from C++17 onwards -> std::optional<typename std::remove_const< ^~~ /usr/local/frc/include/wpi/STLExtras.h:585:21: error: expected initializer before ‘<’ token -> std::optional<typename std::remove_const< ^ /usr/local/frc/include/wpi/STLExtras.h:594:12: error: ‘optional’ in namespace ‘std’ does not name a template type std::optional<typename std::remove_const<typename std::remove_reference< ^~~~ /usr/local/frc/include/wpi/STLExtras.h:594:7: note: ‘std::optional’ is only available from C++17 onwards std::optional<typename std::remove_const<typename std::remove_reference< ^~~ In file included from /usr/local/frc/include/networktables/NetworkTableInstance.h:17, from main.cpp:13: /usr/local/frc/include/wpi/ArrayRef.h:65:44: error: invalid use of ‘::’ /implicit/ ArrayRef(std::nullopt_t) {} ^ /usr/local/frc/include/wpi/ArrayRef.h:65:44: error: expected ‘;’ at end of member declaration /implicit/ ArrayRef(std::nullopt_t) {} ^ ; /usr/local/frc/include/wpi/ArrayRef.h:296:48: error: function definition does not declare parameters /implicit/ MutableArrayRef(std::nullopt_t) : ArrayRef~~/usr/local/frc/include/wpi/json.h:250:40: note: suggested alternative: ‘functio ’ std::conjunction<std::negation<std::is_same<void, CompatibleObjectType>>, ^~~function /usr/local/frc/include/wpi/json.h:250:40: error: ‘conjunction’ is not a member of ‘std’ /usr/local/frc/include/wpi/json.h:250:40: note: suggested alternative: ‘functio ’ std::conjunction<std::negation<std::is_same<void, CompatibleObjectType>>, ^~~function /usr/local/frc/include/wpi/json.h:250:57: error: ‘negation’ is not a member of std’ std::conjunction<std::negation<std::is_same<void, CompatibleObjectType>>, ^~~~ /usr/local/frc/include/wpi/json.h:250:57: note: suggested alternative: ‘negate’ std::conjunction<std::negation<std::is_same<void, CompatibleObjectType>>, ^~~~ negate /usr/local/frc/include/wpi/json.h:250:105: error: wrong number of template arguments (1, should be 3) std::conjunction<std::negation<std::is_same<void, CompatibleObjectType>>, ^~/usr/local/frc/include/wpi/json.h:236:8: note: provided for ‘template<bool B, class RealType, class CompatibleObjectType> struct wpi::detail::is_compatible_object_type_impl’ struct is_compatible_object_type_impl : std::false_type {}; ^,
^
/usr/local/frc/include/wpi/json.h:269:14: error: ‘conjunction’ is not a member of ‘std’
std::conjunction<std::negation<std::is_same<void, CompatibleArrayType>>,
^
~~~~~~~~~ /usr/local/frc/include/wpi/json.h:251:72: error: invalid declarator before ‘,’ token has_mapped_type~~/usr/local/frc/include/wpi/json.h:269:14: note: suggested alternative: ‘functio ’ std::conjunction<std::negation<std::is_same<void, CompatibleArrayType>>, ^~~function /usr/local/frc/include/wpi/json.h:269:31: error: ‘negation’ is not a member of std’ std::conjunction<std::negation<std::is_same<void, CompatibleArrayType>>, ^~~~ /usr/local/frc/include/wpi/json.h:269:31: note: suggested alternative: ‘negate’ std::conjunction<std::negation<std::is_same<void, CompatibleArrayType>>, ^~~~ negate /usr/local/frc/include/wpi/json.h:269:78: error: expected primary-expression before ‘>’ token std::conjunction<std::negation<std::is_same<void, CompatibleArrayType>>, ^~/usr/local/frc/include/wpi/json.h:269:80: error: expected primary-expression before ‘,’ token std::conjunction<std::negation<std::is_same<void, CompatibleArrayType>>
/usr/local/frc/include/wpi/json.h:270:14: error: invalid use of ‘::’ std::negation<is_compatible_object_type< ^,
^
/usr/local/frc/include/wpi/json.h:366:23: error: expected ‘{’ before ‘<’ token
In file included from main.cpp:17:
/usr/local/frc/include/wpi/json.h:4614:66: error: ‘string_view’ in namespace ‘std’ does not name a type
and not std::is_same<ValueType, typename std::string_view>::value
^
~~~ /usr/local/frc/include/wpi/json.h:270:14: error: expected ‘;’ at end of member declaration std::negation<is_compatible_object_type< ^~~~ ; /usr/local/frc/include/wpi/json.h:270:22: error: expected unqualified-id before ‘<’ token std::negation<is_compatible_object_type< ^ In file included from main.cpp:17: /usr/local/frc/include/wpi/json.h:366:23: error: expected template-name before <’ token : std::conjunction<is_complete_type~~/usr/local/frc/include/wpi/json.h:4614:66: note: ‘std::string_view’ is only available from C++17 onwards /usr/local/frc/include/wpi/json.h:4614:77: error: template argument 2 is invalid and not std::is_same<ValueType, typename std::string_view>::value ^/usr/local/frc/include/wpi/json.h: In member function ‘std::cxx11::string wpi::json::value(wpi::StringRef, const char*) const’: /usr/local/frc/include/wpi/json.h:5026:53: error: no matching function for call to ‘wpi::json::value(wpi::StringRef&, std::cxx11::string) const’ return value(key, std::string(default_value)); ^ /usr/local/frc/include/wpi/json.h:5002:15: note: candidate: ‘template<class ValueType, typename std::enable_if<std::is_convertible<wpi::json, ValueType>::value, int>::type > ValueType wpi::json::value(wpi::StringRef, const ValueType&) const’
ValueType value(StringRef key, const ValueType& default_value) const
^~~~~
/usr/local/frc/include/wpi/json.h:5002:15: note: template argument deduction/substitution failed:
/usr/local/frc/include/wpi/json.h:5001:78: error: no type named ‘type’ in ‘struct std::enable_if<false, int>’
std::is_convertible<json_t, ValueType>::value, int>::type = 0>
^
/usr/local/frc/include/wpi/json.h:5024:17: note: candidate: ‘std::cxx11::string wpi::json::value(wpi::StringRef, const char) const’
std::string value(StringRef key, const char default_value) const
^~~~~
/usr/local/frc/include/wpi/json.h:5024:17: note: no known conversion for argument 2 from ‘std::cxx11::string’ {aka ‘std::cxx11::basic_string’} to ‘const char*’
/usr/local/frc/include/wpi/json.h:5072:15: note: candidate: ‘template<class ValueType, typename std::enable_if<std::is_convertible<wpi::json, ValueType>::value, int>::type > ValueType wpi::json::value(const json_pointer&, const ValueType&) const’
ValueType value(const json_pointer& ptr, const ValueType& default_value) const
^~~~~
/usr/local/frc/include/wpi/json.h:5072:15: note: template argument deduction/substitution failed:
/usr/local/frc/include/wpi/json.h:5026:22: note: cannot convert ‘key’ (type ‘wpi::StringRef’) to type ‘const json_pointer&’ {aka ‘const wpi::json_pointer&’}
return value(key, std::string(default_value));
^~~
/usr/local/frc/include/wpi/json.h:5095:17: note: candidate: ‘std:: cxx11::string wpi::json::value(const json_pointer&, const char) const’
std::string value(const json_pointer& ptr, const char default_value) const
^~~~~
/usr/local/frc/include/wpi/json.h:5095:17: note: no known conversion for argument 1 from ‘wpi::StringRef’ to ‘const json_pointer&’ {aka ‘const wpi::json_pointer&’}
/usr/local/frc/include/wpi/json.h: In member function ‘std::cxx11::string wpi::json::value(const json_pointer&, const char*) const’:
/usr/local/frc/include/wpi/json.h:5097:53: error: no matching function for call to ‘wpi::json::value(const json_pointer&, std::cxx11::string) const’
return value(ptr, std::string(default_value));
^
/usr/local/frc/include/wpi/json.h:5002:15: note: candidate: ‘template<class ValueType, typename std::enable_if<std::is_convertible<wpi::json, ValueType>::value, int>::type > ValueType wpi::json::value(wpi::StringRef, const ValueType&) const’
ValueType value(StringRef key, const ValueType& default_value) const
^~~~~
/usr/local/frc/include/wpi/json.h:5002:15: note: template argument deduction/substitution failed:
/usr/local/frc/include/wpi/json.h:5097:22: note: cannot convert ‘ptr’ (type ‘const json_pointer’ {aka ‘const wpi::json_pointer’}) to type ‘wpi::StringRef’
return value(ptr, std::string(default_value));
^~~
/usr/local/frc/include/wpi/json.h:5024:17: note: candidate: ‘std::cxx11::string wpi::json::value(wpi::StringRef, const char) const’
std::string value(StringRef key, const char default_value) const
^~~~~
/usr/local/frc/include/wpi/json.h:5024:17: note: no known conversion for argument 1 from ‘const json_pointer’ {aka ‘const wpi::json_pointer’} to ‘wpi::StringRef’
/usr/local/frc/include/wpi/json.h:5072:15: note: candidate: ‘template<class ValueType, typename std::enable_if<std::is_convertible<wpi::json, ValueType>::value, int>::type > ValueType wpi::json::value(const json_pointer&, const ValueType&) const’
ValueType value(const json_pointer& ptr, const ValueType& default_value) const
^~~~~
/usr/local/frc/include/wpi/json.h:5072:15: note: template argument deduction/substitution failed:
/usr/local/frc/include/wpi/json.h:5071:78: error: no type named ‘type’ in ‘struct std::enable_if<false, int>’
std::is_convertible<json_t, ValueType>::value, int>::type = 0>
^
/usr/local/frc/include/wpi/json.h:5095:17: note: candidate: ‘std::__cxx11::string wpi::json::value(const json_pointer&, const char) const’
std::string value(const json_pointer& ptr, const char default_value) const
^~~~~
/usr/local/frc/include/wpi/json.h:5095:17: note: no known conversion for argument 2 from ‘std:: cxx11::string’ {aka ‘std::__cxx11::basic_string’} to ‘const char*’
make: *** [Makefile:22: main.o] Error 1