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Building Symbian C++ Projects Using Qt SDK
This article explains how to use the Qt SDK to build and package native Symbian C++ projects.
Most Symbian projects can be compiled without the actual Symbian SDK, using tools provided by the Qt SDK. Here are instructions on how to build a Symbian C++ project with the Symbian^3 Command Prompt delivered with the Qt SDK.
Building and Packaging a Symbian Project
Launch the Symbian^3 Command Prompt from the Windows start menu: Qt SDK > Symbian^3 Qt 4.7.3 (later version should work as well) > Qt 4.7.3 for Symbian^3 Command Prompt
Go to the group directory of the Symbian project with the Symbian^3 Command Prompt. To build the project run the following commands:
abld build gcce urel
The build will probably fail with errors indicating that there are missing files. This occurs because the Qt SDK locates some Symbian platform files in different paths than the Symbian SDK.
The solution is to add the missing include paths into the project MMP file. There are two ways to this:
- Add APP_LAYER_SYSTEMINCLUDE to the beginning of the .mmp file
- Add the specific missing include paths as SYSTEMINCLUDE. For example, Sudokumaster game example for Symbian requires the following additional system includes in order to compile with Qt SDK:
After fixing the MMP paths to add the missing include paths, clean the build, regenerate makefiles, and build the project:
abld build gcce urel
The project should now build the gcce release binary without errors. We still need to make a package to try it out.
Creating a SIS package
Go to the sis folder of the project using the Symbian^3 Command prompt. You cannot make the SIS package directly (with makesis package.pkg) since the paths are incorrect. Instead, you must run:
makesis -d%EPOCROOT% package.pkg
The EPOCROOT variable should point to the folder that contains the /epoc32 tree of your Qt installation. If this is not set you can do so by first running:
(note, no need to specify the drive)
If everything goes well, you should now have an unsigned .sis file in your sis folder. It still needs to be signed in order to run.
Note: You can also do this by modifying your .pkg file; Replace the relative paths in the .pkg file from original 'epoc32\release\gcce\urel\' with absolute paths pointing to the corresponding directory in your Qt SDK installation, for example 'C:\QtSDK\Symbian\SDKs\Symbian3Qt473\epoc32\release\gcce\urel\'.
- Replace relative paths pointing to epoc32\... with absolute paths.
- Create the .sis file using the modified .pkg file by running the command: makesis pkg_file_with_modified_paths.pkg
Signing the SIS package
The easiest way to sign the package is to do it again using the command prompt. Full instructions on how to do so are provided in How to sign a .Sis file with Self-Sign Certificate; an abbreviated summary is given below:
- Create key files for custom signing:
makekeys -cert -password World123 -len 1024 -dname "CN=World User OU=Development OR=WorldCompany? CO=FI EM=World@test.com" WorldKey.key WorldCert.cer
- Sign your .sis file, using the keys you just created:
signsis yoursisfile.sis yoursignedsisfile.sis WorldCert.cer WorldKey.key World123
You're done! Your project is now built, packaged into a signed .sis file, and ready to be installed on your Symbian device.
Building and packaging a native Symbian C++ project can be done using the Qt SDK since it contains all the necessary tools and software of the Symbian platform. Due to minor differences between the Symbian platform in the native Symbian SDK and Qt SDK, some tricks may be required. However, as the this article demonstrates, the required effort is not very substantial.