import library linking

[bruce1007]

Hi all, my app uses a third party dll library under win32 with QT 4.1.2 framework, and I "reimp"ed the import lib to a ".a" library file, but linking problem is occured when i finally built the project.

Need your help.

thanks

[mcosta]

Hi all, my app uses a third party dll library under win32 with QT 4.1.2 framework, and I "reimp"ed the import lib to a ".a" library file, but linking problem is occured when i finally built the project.

Need your help.

thanks

In your project file (.pro) add this line

LIBS += -L<PATH_WHERE_LIB_IS> -l<libname>

LIBS += -L<PATH_WHERE_LIB_IS> -l<libname>

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Bye

[bruce1007]

I have used "LIBS += ..." reference, but the linker reported "undefined reference" error back.

[mcosta]

I have used "LIBS += ..." reference, but the linker reported "undefined reference" error back.

Can you post the linker output?

[bruce1007]

the linker output like below

debug\form.o(.text+0x1c0): In function `ZN4FormC2EP7QWidget':
D:/project/study/prac/form.cpp:13: undefined reference to `stopMovie(void*
debug\form.o(.text+0x2d4): In function `ZN4FormC1EP7QWidget':
D:/project/study/prac/form.cpp:13: undefined reference to `stopMovie(void*
collect2: ld returned 1 exit status

[jacek]

How does the LIBS line look exactly? Is that a C++ library?

[mcosta]

How does the LIBS line look exactly? Is that a C++ library?

If isn't a C++ library, use this syntax

extern "C"
{
#include <libinclude>
}

extern "C"
{
#include <libinclude>
}

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