Bug 326497 – >=dev-lang/mono-2.6: [patch] Enable .NET 4.0 profile

• Product: Gentoo Linux
• Status: RESOLVED FIXED

[Description Ron MacNeil 2010-07-01 17:43:40 UTC]

Mono 2.6.x provides (optional) .NET 4.0 support.  This is not currently enabled in the ebuild.  Attached ebuild patch enables it.


Tested and works fine here on:

Linux mini 2.6.34-gentoo-r1 #4 SMP Thu Jun 24 11:33:36 PDT 2010 i686 Genuine Intel(R) CPU 1300 @ 1.66GHz GenuineIntel GNU/Linux


Below is a blurb from the Mono website:

http://www.mono-project.com/Release_Notes_Mono_2.6

Early 4.0 APIs

This release includes partial support for C# 4.0 and includes some of the upcoming .NET 4.0 APIs. Since these APIs have not officially been completed by Microsoft, they could change without notice.

If you want to try out C# 4.0 and the new .NET 4.0 APIs, you should configure Mono with: --with-profile4=yes.


Reproducible: Always

[Comment 1 Ron MacNeil 2010-07-01 17:44:10 UTC]

Created attachment 237163 [details, diff]
Ebuild patch to enable .NET 4.0 profile

[Comment 2 Ron MacNeil 2010-08-31 23:33:39 UTC]

This bug is still relevant for dev-lang/mono-2.6.7

[Comment 3 Pacho Ramos 2010-09-01 08:33:43 UTC]

I am unsure about building it since their APIs have not been finished yet:
http://www.mono-project.com/Release_Notes_Mono_2.6#Early_4.0_APIs

I would prefer to wait for mono-2.8

[Comment 4 Ron MacNeil 2010-09-01 14:42:36 UTC]

Hello Pacho,

I appreciate your position and agree with the sentiment in general.  However a couple of points to consider:

- Since those release notes were written, Microsoft .NET 4 has been shipped, so the 'standard' as such is final:
http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=0a391abd-25c1-4fc0-919f-b21f31ab88b7

- The (partial) .NET 4 support in Mono lives in a new, separate compiler 'dmcs' built in addition to the existing compilers 'mcs', 'gmcs', etc.  So unless a developer specifically chooses said new compiler, they are not affected.  In other words, the new features are 'opt-in' and 'off-by-default'.

- For those of use who do want/require .NET 4 support, the portions of that support that are present in Mono 2.6 are still very useful.  I am personally one of those developers, and I can say anecdotally that I've been making daily use of, for example, Mono's C# 4.0 covariance/contravariance for about 6 months running with no problems.

I hope you'll take these point into consideration and, whatever the outcome, thanks for your work on the ebuild.

Regards,
Ron

[Comment 5 Pacho Ramos 2010-09-07 21:06:25 UTC]

+  07 Sep 2010; Pacho Ramos <[e-mail]> mono-2.6.7.ebuild,
+  metadata.xml:
+  Drop PDEPEND on pe-format (bug #333907 by Michał Górny), fix build on
+  hardened (bug #286280 by Jason Mattax and fix by Magnus Granberg) and
+  allow people to enable .NET 4.0 profile if they want (bug #326497 by Ron
+  MacNeil).