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# Supported Platforms

The Qt team strives to provide support for the platforms most frequently used by Qt users. We have designed our internal testing procedure to divide platforms into three test categories (Tier 1, Tier 2 and Tier 3) in order to prioritize internal testing and development resources so that the most frequently used platforms are subjected to our most rigorous testing processes.

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. Although Qt may be built on a range of platform-compiler combinations, only a subset of these are actively supported by Nokia.

- Tier 1 Platforms
- Tier 2 Platforms
- Tier 3 Platforms (Not supported by Nokia)
- General Legal Disclaimer
- Planned Changes for Qt 4.7

Information about the specific platforms Qt runs on can be found on the Platform Notes page. Information about the compilers used on each platform can be found on the Compiler Notes page.

### Tier 1 Platforms

All Tier 1 platforms are subjected to our unit test suite and other internal testing tools on a frequent basis (prior to new version releases, source tree branching, and at other significant period points in the development process). Errors or bugs discovered in these platforms are prioritized for correction by the development team. Significant errors discovered in Tier 1 platforms can impact release dates and Qt Development Frameworks strives to resolve all known high priority errors in Tier 1 platforms prior to new version releases.

Platform | Compilers
--- | ---
Linux (32 and 64-bit) | gcc 4.2
Microsoft Windows XP | gcc 4.4 (MinGW) (32-bit), MSVC 2003, 2005 (32 and 64-bit)
Microsoft Windows Vista | MSVC 2005, 2008
Microsoft Windows Vista 64bit | MSVC 2008
Apple Mac OS X 10.5 "Leopard" x86_64 (Carbon, Cocoa 32 and 64bit) | As provided by Apple
Embedded Linux QWS (ARM) | gcc (Codesourcery version)
Windows CE 5.0 (ARMv4i, x86, MIPS) | MSVC 2005 WinCE 5.0 Standard (x86, pocket, smart, mipsii)
Symbian (Symbian/S60 3.1, 3.2 and 5.0) | RVCT 2.2 [build 686 or later], WINSCW 3.2.5 [build 482 or later], GCCE (for applications)

### Tier 2 Platforms

Tier 2 platforms are subjected to our unit test suite and other internal testing tools prior to release of new product versions. Qt users should note, however, that errors may be present in released product versions for Tier 2 platforms and, subject to resource availability, known errors in Tier 2 platforms may or may not be corrected prior to new version releases.

Platform | Compilers
--- | ---
Windows XP, Vista | gcc 3.4.2 (MinGW)
Windows 7 | MSVC 2008
Apple Mac OS X 10.6 "Snow Leopard" | As provided by Apple
Apple Mac OS X 10.4 "Tiger" | As provided by Apple
HPUXi 11.11 | aCC 3.57, gcc 3.4
HPUXi 11.23 | aCC 6.10
Solaris 10 (UltraSparc, x86) | Sun Studio 12
AIX 6 | Power5 xlC 7
Microsoft Windows XP | Intel Compiler
Linux | Intel Compiler
Embedded Linux QWS (Mips, PowerPC) | gcc (Codesourcery version)
Embedded Linux X11 (ARM) | gcc (Scratchbox)
Windows CE 6.0 (ARMv4i, x86, MIPS) | MSVC 2008 WinCE 6.0 Professional

### Tier 3 Platforms (Not supported by Nokia)

All platforms not specifically listed above are not supported by Nokia. Nokia does not run its unit test suite or perform any other internal tests on platforms not listed above.

Even though some Tier 3 platforms are available under the Qt Commercial License, technical support is not included in that license. However, contact our sales team to find out about the availability of other services for those platforms.

Qt users should note, however, that there may be various open source projects, community users and/or Qt partners who are able to provide assistance with platforms not supported by Nokia.

### General Legal Disclaimer

Please note that Qt is offered on an "as is" basis without warranty of any kind and that our products are not error or bug free. To the maximum extent permitted by applicable law, Nokia on behalf of itself and its suppliers, disclaims all warranties and conditions, either express or implied, including, but not limited to, implied warranties of merchantability, fitness for a particular purpose, title and non-infringement with regard to the Licensed Software.

### Planned Changes for Qt 4.7

The following changes to the list of supported platforms are at time of publishing planned for Qt 4.7:

- Upgrade Windows 7 to Tier 1
- Upgrade Mac OS X 10.6 to Tier 1
- Add support for Visual Studio 2010 (Tier 2)
- Move support for Carbon implementation of Qt on Mac OS X from Tier 1 to Tier 2
- Drop support for MinGW 3.4
- Drop support for Visual Studio 2003
- Drop support for HP-UX on PA-RISC
- Drop support for Windows Mobile 5
- Drop support for OpenGL ES Common Lite 1.0