[cmake-developers] Fw: Please comment on ios-universal topic

[Bartosz Kosiorek]

Thanks Ruslan for feedback.

I think that this new property should work also for FRAMEWORK and should support both OSX and iOS
In that way it is already done for:
 -  for SHARED library adding FRAMEWORK property produce correct Framework for iOS or OSX (for Cmake 3.5 the documentation was already updated), and standard library for other platforms
 - for MACOSX_BUNDLE (the name of property is very confusing). It will produce BUNDLE for OSX or iOS.
 - even standard SHARED library produce different results according to platform (.so file on Linux, .dll on Windows, .dylib on OSX)

I strongly believe that this new CMake's property should follow this convention.

Currently I'm working in project which must support multiple platforms (Linux, Windows, OSX, iOS, Android, QNX etc.).
And I very like CMake for automagicaly adopting to platform/architecture/OS.

Because "Universal Library" is generic name, which is applicable for all platforms (Fat library is used on Apple machines), 
I would like to propose following  property name:
    INSTALL_UNIVERSAL_LIBRARY

For now it will be applicable only on iOS (OS X?), but it could be extended to other platforms (Android).
Of course all supported platforms should be noticed in documentation.

What do you think about that idea:
Adding one property which will adopt to platform on which is build?


Best Regards
Bartosz

________________________________________
From: Ruslan Baratov <ruslan_baratov at yahoo.com>
Sent: Thursday, December 3, 2015 4:09 AM
To: Bartosz Kosiorek
Cc: Gregor Jasny; cmake-developers at cmake.org
Subject: Re: Fw: [cmake-developers] Please comment on ios-universal topic

On 02-Dec-15 19:44, Bartosz Kosiorek wrote:
> Hi.
>
> Currently we already support similar target properties:
> - INSTALL_NAME_DIR
> - INSTALL_RPATH
> - INSTALL_RPATH_USE_LINK_PATH
>
> It will be great to follow the same name convention.
>
> Because this new property is only applicable for INSTALL step, I would like to propose to rename property name to INSTALL_IOS_UNIVERSAL_LIBS.
>
> What do you think about that idea?
It's hard for me to decide what is better because
IOS_INSTALL_UNIVERSAL_LIBS just came from my mind and I've used it for a
while already. So now it looks solid for no reason :)

However first note:
   INSTALL_RPATH can be read as when we do INSTALL change RPATH to ...
(any platform)
   ANDROID_API -//- when we are on ANDROID use next API ...
   WIN32_EXECUTABLE -//- when we are on WIN32 use bla-bla for EXECUTABLE
   OSX_ARCHITECTURES -//- when we are on OSX use ARCHITECTURES
   MACOSX_BUNDLE -//- when we are on MACOSX create BUNDLE

So new property can be read as:
   IOS_INSTALL_UNIVERSAL_LIBS when we are on IOS do INSTALL_UNIVERSAL_LIBS
   INSTALL_IOS_UNIVERSAL_LIBS when we do INSTALL make IOS_UNIVERSAL_LIBS
(does it mean that when we are on Linux we can install iOS libs? does it
mean that when we are on OSX without iOS toolchain we can do iOS libs?)

Second note is about future improvements of this feature, installing
universal libs on OSX or installing universal frameworks, pattern
<platform>_INSTALL_UNIVERSAL_<type>:

    IOS_INSTALL_UNIVERSAL_LIBS
    IOS_INSTALL_UNIVERSAL_FRAMEWORKS

   OSX_INSTALL_UNIVERSAL_LIBS
   OSX_INSTALL_UNIVERSAL_FRAMEWORKS

   INSTALL_UNIVERSAL_LIBS # on both OSX and iOS
   INSTALL_UNIVERSAL_FRAMEWORKS # on both OSX and iOS

   IOS_INSTALL_UNIVERSAL # both libs and frameworks
   OSX_INSTALL_UNIVERSAL # both libs and frameworks

   INSTALL_UNIVERSAL # both libs and frameworks, both OSX and iOS

?

Ruslo
>
> ________________________________________
> From: cmake-developers <cmake-developers-bounces at cmake.org> on behalf of Gregor Jasny via cmake-developers <cmake-developers at cmake.org>
> Sent: Tuesday, December 1, 2015 3:22 PM
> To: CMake Developers; Ruslan Baratov
> Subject: [cmake-developers] Please comment on ios-universal topic
>
> Hello,
>
> During the last days I worked on the iOS Universal Install topic which
> now would benefit from a review. Especially the core changes could need
> a third pair of eyes:
>
> https://cmake.org/gitweb?p=stage/cmake.git;a=commit;h=8fb23b42cfc2fb7490e8645fff328add9c231713
>
> I will now concentrate on adding more tests during the next days.
>
> Thank you,
> Gregor
>
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