OSXHorrors » History » Version 2
Version 1 (Chris Cannam, 2011-02-28 04:50 PM) → Version 2/29 (Chris Cannam, 2011-02-28 05:01 PM)
h1. OS/X version, hardware platform, and Qt version compatibility
Executive summary: For a program like EasyHg that demands the widest possible compatibility, we currently want to build for 10.4 PPC and Intel 32-bit, 10.5 Intel 32-bit, 10.6 Intel 32- and 64-bit.
To do this, we need at least two builds of Qt: a Carbon build for PPC and i386 on 10.4 using gcc-4.0, and a Cocoa build for x86_64 (and optionally i386) on 10.5+.
h2. OS/X 10.4
h3. As target
* Oldest version still apparently in use as of Feb 2011: not very widespread, but at least two researchers here use it
* Appears in PPC and i386 systems
* Runs in 32-bit mode only
* Can build for it from 10.4, 10.5, 10.6
* Requires SDK @/Developer/SDKs/MacOSX10.4u.SDK@
* Requires @-mmacosx-version-min=10.4@ on 10.5+
* Requires gcc-4.0 to be requested explicitly on 10.6
* Does not support Objective-C 2.0
* Not a supported target for Qt's Cocoa builds, Qt Carbon needed
h3. As build host
* Does not support Objective-C 2.0
* 10.4u SDK can build 64-bit executables of simple programs, but not GUIs
h2. OS/X 10.5
h3. As target
* Not all that much more widely used than 10.4 -- if we were dropping 10.4, we probably might as well drop 10.5 as well
* Last version supported for PPC platforms
* Runs in 32-bit mode by default
* Can build for it from 10.5, 10.6
* Requires SDK @/Developer/SDKs/MacOSX10.5.SDK@
* First version to support Objective-C 2.0
* Qt Cocoa supported
h3. As build host
* Builds 32-bit by default
* Can be used to do 64-bit builds
h2. OS/X 10.6
h3. As target
* By far the most common version as of Feb 2011
* Not supported on PPC
* Runs in 64-bit mode by default where possible
* Is _not_ always 64-bit -- it is supported on 32-bit-only hardware such as Core Duo (first Intel Macs)
h3. As build host
* Builds 64-bit by default
* Can be used to do 32-bit Intel and PPC builds
Executive summary: For a program like EasyHg that demands the widest possible compatibility, we currently want to build for 10.4 PPC and Intel 32-bit, 10.5 Intel 32-bit, 10.6 Intel 32- and 64-bit.
To do this, we need at least two builds of Qt: a Carbon build for PPC and i386 on 10.4 using gcc-4.0, and a Cocoa build for x86_64 (and optionally i386) on 10.5+.
h2. OS/X 10.4
h3. As target
* Oldest version still apparently in use as of Feb 2011: not very widespread, but at least two researchers here use it
* Appears in PPC and i386 systems
* Runs in 32-bit mode only
* Can build for it from 10.4, 10.5, 10.6
* Requires SDK @/Developer/SDKs/MacOSX10.4u.SDK@
* Requires @-mmacosx-version-min=10.4@ on 10.5+
* Requires gcc-4.0 to be requested explicitly on 10.6
* Does not support Objective-C 2.0
* Not a supported target for Qt's Cocoa builds, Qt Carbon needed
h3. As build host
* Does not support Objective-C 2.0
* 10.4u SDK can build 64-bit executables of simple programs, but not GUIs
h2. OS/X 10.5
h3. As target
* Not all that much more widely used than 10.4 -- if we were dropping 10.4, we probably might as well drop 10.5 as well
* Last version supported for PPC platforms
* Runs in 32-bit mode by default
* Can build for it from 10.5, 10.6
* Requires SDK @/Developer/SDKs/MacOSX10.5.SDK@
* First version to support Objective-C 2.0
* Qt Cocoa supported
h3. As build host
* Builds 32-bit by default
* Can be used to do 64-bit builds
h2. OS/X 10.6
h3. As target
* By far the most common version as of Feb 2011
* Not supported on PPC
* Runs in 64-bit mode by default where possible
* Is _not_ always 64-bit -- it is supported on 32-bit-only hardware such as Core Duo (first Intel Macs)
h3. As build host
* Builds 64-bit by default
* Can be used to do 32-bit Intel and PPC builds