Need help accessing AVT camera (with wrapper?)!

[ChrisW67]

The *.lib files will not work directly with MingW (the second paragraph is about Dev C++). You should find the MingW linker will work directly against the C wrapper DLL. Try this:

INCLUDEPATH += C:/FirePackage/FireGrab/Lib/Extra
LIBS += -LC:/FirePackage/FireGrab/Lib/Extra -lFGWrap

INCLUDEPATH += C:/FirePackage/FireGrab/Lib/Extra
LIBS += -LC:/FirePackage/FireGrab/Lib/Extra -lFGWrap

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[emigrand]

Thanks a lot Chris, that did it! Although I didn`t "fully" understand the magic behind your code. A short comment would be nice

[ChrisW67]

INCLUDEPATH is used during the compilation of your C++ code into object files (*.obj or *.o). Any #include "file.h" directive will potentially search through directories listed in INCLUDEPATH in order to find "file.h" if it is not in the current directory.

LIBS controls the linking phase, where your object files are coalesced into your target executable or library. The "-L" entries specify a directory to search for named libraries (there can be several). The "-l" (lower case L) entries specify the name of libraries (*.lib or *.a) to search for routines used by your program that are not present in your program.

C++ compilers do not generally create libraries compatible with other C++ compilers for technical reasons: which is why the C++ interface library built with MSVC is not available to you using MingW. A C-style interface is portable between compilers but, for obvious reasons, cannot export classes or other C++ constructs. The C-style interface gives you a handle-based interface in your wrapper. MingW can often use a DLL with C-style interfaces directly without a separate *.lib or *.a file: this is what has worked here.