LNK2019 : Unresolved External Symbols referenced in function_main

alok9871

Please help me with a problem I've been facing

I have been trying to add a library into my project. My project file looks like this :

@
QT += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = sdk2
TEMPLATE = app
 
 
 
SOURCES += main.cpp\
mainwindow.cpp
 
HEADERS += mainwindow.h \
../../../../../SDKstudy/Runtime5.1/include/fgrab_struct.h \
../../../../../SDKstudy/Runtime5.1/include/fgrab_prototyp.h \
../../../../../SDKstudy/Runtime5.1/include/fgrab_define.h
 
INCLUDEPATH += $$PWD/../../../../../SDKstudy/Runtime5.1\include
DEPENDPATH += $$PWD/../../../../../SDKstudy/Runtime5.1\include
 
 
INCLUDEPATH += C:\Users\Alok\SDKstudy\Runtime5.1\dll\mE4AD1-CL
DEPENDPATH += C:\Users\Alok\SDKstudy\Runtime5.1\dll\mE4AD1-CL
 
 
FORMS += mainwindow.ui
 
 
 
LIBS += -L$$PWD/../../../../../SDKstudy/Runtime5.1/lib/visualc2005_amd64/ -lfglib5
 
INCLUDEPATH += $$PWD/../../../../../SDKstudy/Runtime5.1/lib/visualc2005_amd64
DEPENDPATH += $$PWD/../../../../../SDKstudy/Runtime5.1/lib/visualc2005_amd64

@

When i try to run the code i get the following error

main.obj:-1: error: LNK2019: unresolved external symbol _Fg_Init referenced in function _main

Can you please help me resolve this

Many thanks

tzander

looks like the lib you link to (fglib5) did not export that symbol. Are you sure its supposed to be used by your app?

alok9871

Hi Thomas

pardon me..but i did not understand by what you meant by "did not export that symbol". fglib5 is a 3rd party library very crucial for my project, and I have been unable to link it yet.

tzander

http://www.gnu.org/software/gnulib/manual/html_node/Exported-Symbols-of-Shared-Libraries.html

alok9871

I see.. thanks for the link.

What is the way out then?

alok9871

my compilation output is this, in case it helps

@16:29:46: Running steps for project sdk2...
16:29:46: Starting: "C:\Users\Alok\Qt5.0.0beta2\5.0.0-beta2\msvc2010\bin\qmake.exe" "C:\Users\Alok\Qt5.0.0beta2\Tools\Qt Creator\bin\sdk2\sdk2.pro" -r -spec win32-msvc2010 "CONFIG+=debug" "CONFIG+=qml_debug"
16:29:47: The process "C:\Users\Alok\Qt5.0.0beta2\5.0.0-beta2\msvc2010\bin\qmake.exe" exited normally.
16:29:47: Starting: "C:\Users\Alok\Qt5.0.0beta2\Tools\Qt Creator\bin\jom.exe"
"C:\Users\Alok\Qt5.0.0beta2\Tools\Qt Creator\bin\jom.exe" -f Makefile.Debug
echo 1 /* CREATEPROCESS_MANIFEST_RESOURCE_ID / 24 / RT_MANIFEST / "debug\sdk2.exe.embed.manifest">debug\sdk2.exe_manifest.rc
if not exist debug\sdk2.exe del debug\sdk2.exe.embed.manifest>NUL 2>&1
if exist debug\sdk2.exe.embed.manifest copy /Y debug\sdk2.exe.embed.manifest debug\sdk2.exe_manifest.bak
link /NOLOGO /DYNAMICBASE /NXCOMPAT /DEBUG /SUBSYSTEM:WINDOWS "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='' processorArchitecture='*'" /MANIFEST /MANIFESTFILE:debug\sdk2.exe.embed.manifest /OUT:debug\sdk2.exe @C:\Users\Alok\AppData\Local\Temp\sdk2.exe.1200.0.jom
main.obj : error LNK2019: unresolved external symbol _Fg_Init referenced in function _main
debug\sdk2.exe : fatal error LNK1120: 1 unresolved externals
jom: C:\Users\Alok\Qt5.0.0beta2\Tools\Qt Creator\bin\sdk2-build-Desktop_Qt_5_0_0_beta2_MSVC2010_32bit_SDK-Debug\Makefile.Debug [debug\sdk2.exe] Error 1120
jom: C:\Users\Alok\Qt5.0.0beta2\Tools\Qt Creator\bin\sdk2-build-Desktop_Qt_5_0_0_beta2_MSVC2010_32bit_SDK-Debug\Makefile [debug] Error 2
16:29:47: The process "C:\Users\Alok\Qt5.0.0beta2\Tools\Qt Creator\bin\jom.exe" exited with code 2.
Error while building/deploying project sdk2 (target: Desktop Qt 5.0.0 beta2 MSVC2010 32bit (SDK))
When executing step 'Make'
@