Ravi

Any updates on this.  We were to try this on yesterday . Please advise

Regards

Sada

From: Ravikanth MVR [mailto:ravikanth.mvr@avagotech.com]
Sent: Thursday, January 14, 2016 3:04 PM
To: Ard Biesheuvel
Cc: Leif Lindholm; Daniel Samuelraj; Jianning Wang; Linaro UEFI Mailman List; Sadananda Murthy
Subject: Re: [Linaro-uefi] Compiling CPP files ARM64

In UDK.I will try out on EDK2 and let you know the results.

Thanks.

On Thu, Jan 14, 2016 at 3:02 PM, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:

On 14 January 2016 at 10:28, Ravikanth MVR <ravikanth.mvr@avagotech.com> wrote:
> Ard,
>
> OK.But when a simple HelloWorld program,which is part of EDK2 sample
> programs and which is written in c,is renamed to .CPP,we get these
> relocation issues in-spite of not using any C++ runtime API's.
>

In UDK or EDK2?

> On Thu, Jan 14, 2016 at 2:39 PM, Ard Biesheuvel <ard.biesheuvel@linaro.org>
> wrote:
>>
>> On 14 January 2016 at 10:06, Ravikanth MVR <ravikanth.mvr@avagotech.com>
>> wrote:
>> > Hi Ard,
>> >
>> > Hope you remember we speaking about the 0x105 and 0x0 relocation issues
>> > which we came across while compiling a simple HelloWorld program in
>> > CPP.As
>> > you said on the other thread(EDK2 mailing list)we need some changes to
>> > compiler and GenFw utility of UDK,can we take the required changes
>> > forward
>> > and come up with a UDK with this support?
>> >
>> > We are stuck at this juncture with this activity and would need your
>> > help
>> > badly.
>> >
>>
>> Please forget about UDK, and rebase your work onto the latest EDK2
>> master branch. There have been many changes to the way relocations are
>> handled, which also impose requirements at link time (i.e., in terms
>> of section alignment, and relative offset between sections both in the
>> ELF and the PE/COFF versions of the image)
>>
>> However, the relocation issue was due to the fact that you were using
>> the Linux version of the C++ runtime, which you cannot use under EDK2
>> even if we do support those relocation types with the newer tools.
>>
>> Bottom line is that you need to develop your own C++ minimal runtime
>> if you want to run C++ programs under EDK2
>>
>> > On Tue, Jan 5, 2016 at 4:29 PM, Ravikanth MVR
>> > <ravikanth.mvr@avagotech.com>
>> > wrote:
>> >>
>> >> +Sada.
>> >>
>> >> Thanks.
>> >>
>> >> On Wed, Dec 30, 2015 at 8:38 PM, Ard Biesheuvel
>> >> <ard.biesheuvel@linaro.org> wrote:
>> >>>
>> >>> On 30 December 2015 at 16:02, Leif Lindholm <leif.lindholm@linaro.org>
>> >>> wrote:
>> >>> > Hi Daniel,
>> >>> >
>> >>> > Sorry, your email got stuck in my SPAM folder for some reason.
>> >>> >
>> >>> > On Wed, Dec 23, 2015 at 05:25:21PM -0500, Daniel Samuelraj wrote:
>> >>> >> We are able to compile CPP files for X64 using UDK2014 by using
>> >>> >> Visual
>> >>> >> Studio.
>> >>> >>
>> >>> >> How do we compile the same source for AARCH64?
>> >>>
>> >>> Do you mean C++? That is completely unsupported, and is going to be
>> >>> quite a challenge to implement. Note that you cannot rely on the C++
>> >>> runtime for various reasons (including, but not limited to, the fact
>> >>> that it uses small model relocations, and is built against libc on
>> >>> Linux) I wonder how that even works on Visual Studio for X64, since
>> >>> the code you build will try to call libc functions from the VC runtime
>> >>> library.
>> >>>
>> >>> There has been some discussion about this recently on the list. If you
>> >>> disable exceptions and RTTI, and reimplement your new and delete
>> >>> operators, you may be able to build code that does not rely on
>> >>> advanced C++ runtime features.
>> >>>
>> >>> --
>> >>> Ard.
>> >>
>> >>
>> >
>
>