QT+ External Lib Compile in Visual Studio not in QT Creator.

Lo Public Name

Hello All

I am struggling for 3 days now including a library (.lib) file in Qt Creator
The Lib is a Lidar SDK for managing a laser hardware : https://github.com/YDLIDAR/YDLidar-SDK

Readme advise visual studio to compile , wich i did sucessfully as a static library.

To use the lib, I create a QT project and link the YLIDAR_SDK
in : visual studio -> fine
in : qt creator -> LNK2019: unresolved external

with exactly the same source files , lib, headers and links using both msvc2015 or msvc2019

my : .conf

lib : lydlidar_sdk.lib
includes

SDK-G2/core
SDK-G2/src
SDK-G2

QT += quick

CONFIG += c++11

.# You can make your code fail to compile if it uses deprecated APIs.
.# In order to do so, uncomment the following line.
.#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
        lidamemanager.cpp \
        main.cpp

RESOURCES += qml.qrc

.# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

.# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =

.# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

win32: LIBS += -L$$PWD/../../VisualStudio/SDK-G2/build/Debug/ -lydlidar_sdk

INCLUDEPATH += $$PWD/../../VisualStudio/SDK-G2/core
DEPENDPATH += $$PWD/../../VisualStudio/SDK-G2/core

INCLUDEPATH += $$PWD/../../VisualStudio/SDK-G2/src
DEPENDPATH += $$PWD/../../VisualStudio/SDK-G2/src

INCLUDEPATH += $$PWD/../../VisualStudio/SDK-G2
DEPENDPATH += $$PWD/../../VisualStudio/SDK-G2

win32:!win32-g++: PRE_TARGETDEPS += $$PWD/../../VisualStudio/SDK-G2/build/Debug/ydlidar_sdk.lib
else:win32-g++: PRE_TARGETDEPS += $$PWD/../../VisualStudio/SDK-G2/build/Debug/libydlidar_sdk.a

HEADERS += \
    lidamemanager.h

When i compile ( qmake & msvc15 or 19 ) i get and linking issue

ydlidar_sdk.lib(list_ports_win.obj):-1: error: LNK2019: unresolved external symbol __imp_RegQueryValueExA referenced in function "class std::vector<struct ydlidar::core::serial::PortInfo,class std::allocator<struct ydlidar::core::serial::PortInfo> > __cdecl ydlidar::core::serial::list_ports(void)" (?list_ports@serial@core@ydlidar@@YA?AV?$vector@UPortInfo@serial@core@ydlidar@@V?$allocator@UPortInfo@serial@core@ydlidar@@@std@@@std@@XZ)

where

RegQueryValueExA is a function declared in from "winreg.h" and "setupapi.lib" used in a file from the YLIDAR_SDK

i tried quite a lot of stuff unsuccessfuly ....
Compiling the SDK in QT
addind the setupapi.lib in QT
trying MSVC2015 MSVC2019

As code compilation works fine in visual studio i am wondering what i am missing in QT
Any suggestions ?
Thanks

SGaist

Hi and welcome to devnet,

@Lo-Public-Name said in QT+ External Lib Compile in Visual Studio not in QT Creator.:

RegQueryValueExA

That symbol comes from the Advapi32 library. You need to link to that one.

Lo Public Name

@SGaist said in QT+ External Lib Compile in Visual Studio not in QT Creator.:

Advapi32

THANKS ( in capital letters ) that was it !