Conditional linkage

[TorAn]

I have two sets of static libraries: one is for production release and another for debugging purposes.

I can conditionally compile with headers from both libraries using #ifdef but how can I conditionally link?

[franz]

You'll have to put those settings into your makefile or qmake project.

production {
    DEFINES += PRODUCTION
    LIBS += -lproductionlib
} 
else:release {
    DEFINES += RELEASE
    LIBS += -lreleaselib
}

production {
    DEFINES += PRODUCTION
    LIBS += -lproductionlib
} 
else:release {
    DEFINES += RELEASE
    LIBS += -lreleaselib
}

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then when you call

qmake -config production

qmake -config production

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your code will be linked against the productionlib library and with

qmake -config release

qmake -config release

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it will be linked against the releaselib library.

Of course you can do more or less the same using the automake tools and probably also with CMake.