Why default Qt linker cannot link to libraries

francoatmega

i'am developing a project and every external libraries I trie to use the same errors appears...
Unsolved reference, the linker cannot find the library that a specifie in the LIBS variable of os .pro file.

Below my .pro file and the linker error:

.pro file

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = WanGlacier2
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

INCLUDEPATH += \
    D:\3include \

LIBS += \
    -LD:\1libs \
    -laws-cpp-sdk-core

SOURCES += \
        main.cpp \
    wanconfig.cpp \
    wanconfigbd.cpp \
    wanconfigaws.cpp \
    waninicial.cpp

HEADERS += \
    wanconfig.h \
    wanconfigbd.h \
    wanconfigaws.h \
    waninicial.h

FORMS += \
    wanconfig.ui \
    wanconfigbd.ui \
    wanconfigaws.ui \
    waninicial.ui

.pro file

Linker error

00:34:36: Running steps for project WanGlacier2...
00:34:36: Configuration unchanged, skipping qmake step.
00:34:36: Starting: "C:\Qt\Tools\mingw530_32\bin\mingw32-make.exe" 
C:/Qt/Tools/mingw530_32/bin/mingw32-make -f Makefile.Debug
mingw32-make[1]: Entering directory 'C:/Users/francoatmega/Documents/build-WanGlacier2-Desktop_Qt_5_9_1_MinGW_32bit-Debug'
g++ -Wl,-subsystem,windows -mthreads -o debug/WanGlacier2.exe debug/main.o debug/wanconfig.o debug/wanconfigbd.o debug/wanconfigaws.o debug/waninicial.o debug/moc_wanconfig.o debug/moc_wanconfigbd.o debug/moc_wanconfigaws.o debug/moc_waninicial.o  -lmingw32 -LC:/Qt/5.9.1/mingw53_32/lib C:/Qt/5.9.1/mingw53_32/lib/libqtmaind.a -LC:/utils/my_sql/my_sql/lib -LC:/utils/postgresql/pgsql/lib -lshell32 C:/Qt/5.9.1/mingw53_32/lib/libQt5Cored.a -LD:/1libs -laws-cpp-sdk-core C:/Qt/5.9.1/mingw53_32/lib/libQt5Widgetsd.a C:/Qt/5.9.1/mingw53_32/lib/libQt5Guid.a C:/Qt/5.9.1/mingw53_32/lib/libQt5Cored.a 
debug/main.o: In function `Z5qMainiPPc':
C:\Users\francoatmega\Documents\build-WanGlacier2-Desktop_Qt_5_9_1_MinGW_32bit-Debug/../WanGlacier2/main.cpp:43: undefined reference to `Aws::InitAPI(Aws::SDKOptions const&)'
C:\Users\francoatmega\Documents\build-WanGlacier2-Desktop_Qt_5_9_1_MinGW_32bit-Debug/../WanGlacier2/main.cpp:45: undefined reference to `Aws::ShutdownAPI(Aws::SDKOptions const&)'
collect2.exe: error: ld returned 1 exit status
Makefile.Debug:85: recipe for target 'debug/WanGlacier2.exe' failed
mingw32-make[1]: Leaving directory 'C:/Users/francoatmega/Documents/build-WanGlacier2-Desktop_Qt_5_9_1_MinGW_32bit-Debug'
Makefile:36: recipe for target 'debug' failed
mingw32-make[1]: *** [debug/WanGlacier2.exe] Error 1
mingw32-make: *** [debug] Error 2
00:34:39: The process "C:\Qt\Tools\mingw530_32\bin\mingw32-make.exe" exited with code 2.
Error while building/deploying project WanGlacier2 (kit: Desktop Qt 5.9.1 MinGW 32bit)
When executing step "Make"
00:34:39: Elapsed time: 00:03.

Linker Error

[Added code tags ~kshegunov]

kshegunov

@francoatmega said in Why default Qt linker cannot link to libraries:

LIBS += \
    -LD:\1libs \

Perhaps you meant to write:

-LD:/1libs \

You don't use backslashes but forward slashes with qmake.

francoatmega

@kshegunov Same error bro...
And I was looking the the mingw32-make use backslash:

mingw32-make[1]: Entering directory 'C:/Users/francoatmega/Documents/build-WanGlacier2-Desktop_Qt_5_9_1_MinGW_32bit-Debug'
g++ -Wl,-subsystem,windows -mthreads -o debug\WanGlacier2.exe debug/main.o debug/wanconfig.o debug/wanconfigbd.o debug/wanconfigaws.o debug/waninicial.o debug/moc_wanconfig.o debug/moc_wanconfigbd.o debug/moc_wanconfigaws.o debug/moc_waninicial.o -lmingw32 -LC:\Qt\5.9.1\mingw53_32\lib C:\Qt\5.9.1\mingw53_32\lib\libqtmaind.a -LC:\utils\my_sql\my_sql\lib -LC:\utils\postgresql\pgsql\lib -lshell32 -LD:\1libs -laws-cpp-sdk-core C:\Qt\5.9.1\mingw53_32\lib\libQt5Widgetsd.a C:\Qt\5.9.1\mingw53_32\lib\libQt5Guid.a C:\Qt\5.9.1\mingw53_32\lib\libQt5Cored.a

I think that this error can be because I 'am triyng to compile a library who was made on Visual Studio. What do you think?

kshegunov

@francoatmega said in Why default Qt linker cannot link to libraries:

I think that this error can be because I 'am triyng to compile a library who was made on Visual Studio.

This is most definitely it. You can't mix compilers, you have to compile your app with a matching compiler or your library with mingw.