> The only concern is that it's binary incompatible (different ABI for fp Seemed one big issue. Not sure if or not we can get some data on the gap between 'softfp' and 'hard'?
> In your other email, you wrote "For hard instead of softfp, with the update > to gcc 4.5.0, it supports to do this". What did you mean by this? Gcc doesn't support 'hard' combined with 'vfp' before 4.5. Quote from 4.4 manual: "Using '-mfloat-abi=hard' with VFP coprocessors is not supported." But 4.5 didn't have this limitation anymore. CodeSourcery should backport this support from gcc 4.5 branch. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Thiago Macieira Sent: Thursday, August 05, 2010 9:24 PM To: Development for the MeeGo Project (discussion list) Subject: Re: [MeeGo-dev] ARM softfloat or hardfloat? On Thursday 5. August 2010 02.25.40 Zhang, Austin wrote: > So any concern on switch softfp to hard? Meanwhile, what compiler is > being used for Maemo 5 build? Does it support Neon naturally? > > And as you may know, so far, we had switch compiler to 4.5.0, so > seemed it is also time to change those flags. The only concern is that it's binary incompatible (different ABI for fp parameters) from existing N900 applications. I don't know which way Harmattan would go -- Maemo5 backwards compatibility or MeeGo future compatibility. The Maemo5 toolchain uses gcc 4.2, from the CodeSourcery release 2007q1 (I think). I think Harmattan upgraded to 2009q3, so gcc 4.3. Personally, I don't use either: I upgrade by downloading a new toolchain from CodeSourcery. In your other email, you wrote "For hard instead of softfp, with the update to gcc 4.5.0, it supports to do this". What did you mean by this? -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org Senior Product Manager - Nokia, Qt Development Frameworks PGP/GPG: 0x6EF45358; fingerprint: E067 918B B660 DBD1 105C 966C 33F5 F005 6EF4 5358 _______________________________________________ MeeGo-dev mailing list [email protected] http://lists.meego.com/listinfo/meego-dev
