Contents.IntroductionThis tutorial illustrates different approaches for using a custom library in your application on Windows. The first part explains how to create a shared library and how to link against it in your application. The second part is about creating and using a static library.To organize a bigger project with libraries and executables, take a look atCreating a shared libraryWhen creating a shared library that you would like to link against, then you need to ensure that the symbols that are going to be used outside the library are properly exported when the library is created. Subsequently imported when you are linking against the library. This can be done using and as shown in the following example:test.h. TEMPLATE = libSOURCES += test.cppHEADERS += test.hDEFINES += MAKETESTLIBQT += widgetsOn Windows, MinGW will output.a and.dll, MSVC will output.lib and.dll.On Linux, gcc/clang will output.so,.so.1,.so.1.0 and.so.1.0.0 -.lib,.a and.so are import libraries.
IPhone, iPad, iPod touch, & Mac desktop. 6. Home Library: This app not only allows you to catalogue and track the loan status for each item in your library, but it also allows you to send “polite reminders to friends who haven’t returned your books.” It also accommodates wishlists. How can I compile a library in 32bit on a 64bit Mac machine (Mountain Lion) Ask Question Asked 7 years, 1 month ago. Actually everything it checked for i386 had a 'no' in the end. But the compilation succeed, just the library does not seem to be 32bit. Anyone can help with this? Macos build makefile osx-mountain-lion 32-bit.
They help link your code to the library and is needed when you build your file(.a files not all the time).See also the documentation on.Linking your application against the shared libraryIn order to use the shared library in your application, then you can include the headers of your library in your code and use the methods. Compile with linking to the.lib file. At runtime this loads the dll which has the implementation.To set this up, then in your application's.pro file you need to inform the application where to find the headers and the library. The needs to point to the directory where the headers are installed, and the variable needs to point to the directory of the.lib file. In addition you need to ensure that the.dll is found by either putting it in the application's directory or in the global PATH.For example:loadTestLib.pro. HeadersDataFiles.path = $$ QTINSTALLHEADERS /MyLib/headersDataFiles.files = $$PWD/src/.hINSTALLS += headersDataFileslibraryFiles.path = $$ QTINSTALLLIBS CONFIG(debug, debug release): libraryFiles. Files = $$ OUTPWD/ debug/.
A $$ OUTPWD/ debug/. Prl CONFIG(release, debug release): libraryFiles.
Files = $$ OUTPWD/ release/. A $$ OUTPWD/ release/. Prl INSTALLS += libraryFilesYou need to specify what files you want to copy with and where you want to put them by using and.For more information, see.Which approach to chooseWhich approach to choose depends on your needs. When creating a shared library, you need to deploy it with your application. On the plus side, applications and libraries linked against a shared library are small.
Whether to use QLibrary to load the.dll or just standard linking, depends on whether you have access to the headers and the.lib files, if you don't have access to those, then QLibrary is an alternative.Static linking results in a stand-alone executable. The advantage is that you will only have a few files to deploy. The disadvantage is that the executables are large. See the for more details on shared and static builds.
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