using third party libs

[jay]

I am having a third party SDK (libs and dlls)
[the doc saying that this SDK is used in Linux and MAC as well]

1. can anyone help me to how to include these libs with my Qt application.
Windows: adding LIBS += <lib name> into the .pro file is enough?

2. May I know how this could be done in other OS(linux and MAC)

If anyone tried like this before. help me.

Thanks in advance.

[jay]

will QLibrary class help me for doing this?

[spirit]

1. can anyone help me to how to include these libs with my Qt application.
Windows: adding LIBS += <lib name> into the .pro file is enough?

yes, this is enough for all platform. read this (http://doc.trolltech.com/4.5/qmake-variable-reference.html#libs). then you need to include needed h-file in your sources for using objects from 3d-party library.
but this approach is ok when you have static library and dynamic link library.

if you have olny dynamic link library then you have to use QLibrary.

[talk2amulya]

its better to add the entries in the pro file. Here's how:


LIBS += -L"PathToLibDirectory" -l"libraryName"

this will work on all OS. Hail the Qt!

[jay]

Happy to see the Quick replies from this forum.

many thanks for both of you.

I never included libs in other platforms(MAC and Linux) before.

Now, I am having only .dll & .lib and a header(.h) files.
So I should get the equivalent for other OS? ( .so for Linux and .dylib for MAC) ?

[talk2amulya]

yes, then in your pro file, u'll need to make OS specific entries, like:

win32
{
//Libs entry
}

unix
{
//Libs entry
}

mac
{
//Libs entry
}

[spirit]

Happy to see the Quick replies from this forum.

many thanks for both of you.

I never included libs in other platforms(MAC and Linux) before.

Now, I am having only .dll & .lib and a header(.h) files.
So I should get the equivalent for other OS? ( .so for Linux and .dylib for MAC) ?

that's described in link which I've posted.

[jacky]

I am newbie in QT.
I have a Win32 static lib file without source code and header file and I have to use it in QT.
I try to make its header file but it seems incorrect and the compiler says "Undefine reference to 'A::A()'".
I guess I need a tool to generate the header for a static lib to use in QT but I don't know.
Thanks for any advices from you.

[adamatic]

Hello.

I am trying to include a external lib too, i have read different posts and I have used some alternatives but anyone is working.

T think the righit way is including the lib as the link http://doc.trolltech.com/4.5/qmake-variable-reference.html#libs tells, including the variables as tell this onehttp://www.brindusescu.org/?q=node/26 , and nothing.

I am beginning to think I should modify the Makefile file. should i do?

I am using Windows XP, a Qt project on Eclipse and Mingw as compiler.

Cheers!!

[adamatic]

Hi again.

I am writing LIBS+= c:/library/api_mil.lib to the .pro file of my project and when i built the project the comipiler says :

cannot find c:/library/api_mil.lib

Please does anyone know what I am doing wrong?

[spud]

That should be
LIBS+= -L"c:/library" -l"api_mil"

[adamatic]

I am doing this and I obtaine the following error:

C:/library/api_mil.lib: file not recognized: File format not recognized

I am getting crazy!! :eek:

[spud]

Oh, you are using Mingw. Mingw expects .a files not .lib. I don't think you can simply link to a lib compiled with MSVC. Somebody please correct me if I am wrong.

[adamatic]

Aaahm ok, I can see...

And there is no way to convert the .lib in a .a? or maybe I could use the dll file of the API which I have it too.

This is to not change the compiler, because i have all the Eclipse configuration with Mingw.