Adding Compilers

Qt is supported on a variety of 32-bit and 64-bit platforms, and can usually be built on each platform with GCC, a vendor-supplied compiler, or a third party compiler. In Qt Creator, a kit specifies the compiler and other necessary tools for building and running an application on a particular platform.

Qt Creator automatically detects the compilers that are registered by your system or by an SDK. You can add compilers to build applications by using other compilers or by using additional versions of the automatically detected compilers:

  • GNU Compiler Collection (GCC) is a compiler for Linux and Mac OS X.
  • MinGW (Minimalist GNU for Windows) is a native software port of GCC and GNU Binutils for use in the development of native Microsoft Windows applications on Windows. MinGW is distributed together with Qt Creator and Qt SDK for Windows.
  • Linux ICC (Intel C++ Compiler) is a group of C and C++ compilers for Linux.
  • Clang is a C, C++, Objective C, and Objective C++ front-end for the LLVM compiler for Windows, Linux, and Mac OS X.

To build an application using GCC, MinGW, or Clang, specify the path to the directory where the compiler is located and select the application binary interface (ABI) version from the list of available versions. You can also create a custom ABI definition.

You specify the compiler to use for each kit in Tools > Options > Build & Run > Kits.

To add compilers:

  1. Select Tools > Options > Build & Run > Compilers > Add and select a compiler in the list.

    To clone the selected compiler, select Clone.

  2. In the Name column, double-click the name to change it.
  3. In the Compiler path field, enter the path to the directory where the compiler is located.

    The other settings to specify depend on the compiler.

Troubleshooting MinGW Compilation Errors

If error messages displayed in the Compile Output pane contain paths where slashes are missing (for example, C:QtSDK), check your PATH variable. At the command line, enter the following commands:

 where sh.exe
 where make.exe
 where mingw32-make.exe

If these commands show paths, they have been added to the global PATH variable during the installation of a tool chain based on Cygwin or MinGW, even though this is against Windows conventions.

To keep working with the third-party tool chain, create a new shell link that adds the required paths (as Visual Studio and Qt do). The shell link must point to cmd.exe, as illustrated by the following example:

C:\Windows\System32\cmd.exe /K C:\path_to\myenv.bat

where the /K parameter carries out the command specified in the bat file.

Create the myenv.bat file at path_to, which should be in a convenient location. In the file, specify the paths to the tool chains. For example,

set PATH=C:\path1;C:\path2;%PATH%

where path1 and path2 are paths to the tool chains.

Finally, remove the paths from the global PATH, reboot the computer, and run the where commands again to verify that the global PATH is now clean.

You can use the shell link to run the tools in the third-party tool chains.

Notes provided by the Qt Community

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