[gentoo-user] Adding an extra patch to an ebuild

[gentoo-user] Adding an extra patch to an ebuild

[Adam Carter]

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It looks like i have hit this gcc 4.7 build bug:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53113

Theres a patch attached to the bug i'd like to apply. Unfortunately the gcc
4.7.2 ebuild doesnt have "epatch_user", so i need to take the other
approach listed in the handbook. It suggests i use a custom environment but
i dont understand how i would apply a patch by setting an environment
variable. Can anyone explain?

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Re: [gentoo-user] Adding an extra patch to an ebuild

[Markos Chandras]

On Wed, Nov 21, 2012 at 8:38 AM, Adam Carter <adamcarter3@gmail.com> wrote:
> It looks like i have hit this gcc 4.7 build bug:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53113
>
> Theres a patch attached to the bug i'd like to apply. Unfortunately the gcc
> 4.7.2 ebuild doesnt have "epatch_user", so i need to take the other approach
> listed in the handbook. It suggests i use a custom environment but i dont
> understand how i would apply a patch by setting an environment variable. Can
> anyone explain?

Can you show us the link from the handbook?

-- 
Regards,
Markos Chandras / Gentoo Linux Developer / Key ID: B4AFF2C2

Re: [gentoo-user] Adding an extra patch to an ebuild

[Adam Carter]

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> Can you show us the link from the handbook?
>
> http://www.gentoo.org/doc/en/handbook/handbook-amd64.xml?part=3&chap=6

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Re: [gentoo-user] Adding an extra patch to an ebuild

[Helmut Jarausch]

On 11/21/2012 09:38:26 AM, Adam Carter wrote:
> It looks like i have hit this gcc 4.7 build bug:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53113
> 
> Theres a patch attached to the bug i'd like to apply. Unfortunately  
> the gcc
> 4.7.2 ebuild doesnt have "epatch_user", so i need to take the other
> approach listed in the handbook. It suggests i use a custom  
> environment but
> i dont understand how i would apply a patch by setting an environment
> variable. Can anyone explain?
> 

Please have a look at

http://www.gentoo.org/doc/en/handbook/handbook-amd64.xml?part=3&chap=6

/etc/portage/patches

Helmut.

Re: [gentoo-user] Adding an extra patch to an ebuild

[Markos Chandras]

On Wed, Nov 21, 2012 at 9:46 AM, Helmut Jarausch
<jarausch@igpm.rwth-aachen.de> wrote:
> On 11/21/2012 09:38:26 AM, Adam Carter wrote:
>>
>> It looks like i have hit this gcc 4.7 build bug:
>> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53113
>>
>> Theres a patch attached to the bug i'd like to apply. Unfortunately the
>> gcc
>> 4.7.2 ebuild doesnt have "epatch_user", so i need to take the other
>> approach listed in the handbook. It suggests i use a custom environment
>> but
>> i dont understand how i would apply a patch by setting an environment
>> variable. Can anyone explain?
>>
>
> Please have a look at
>
> http://www.gentoo.org/doc/en/handbook/handbook-amd64.xml?part=3&chap=6
>
> /etc/portage/patches
>
> Helmut.
>

This requires the ebuild to use epatch_user.

Adam, I don't it is possible to use the 'evn' file to patch an ebuild.
Either edit the ebuild directly and add your patch or open a bug
asking the toolchain maintainers to add epatch_user to gcc. But I have
to say, it is easier if you just edit the ebuild, add the epatch_user
line there, run ebuild digest and then place your patch in
/etc/portage/patches. You should then be able to build gcc just fine.

-- 
Regards,
Markos Chandras / Gentoo Linux Developer / Key ID: B4AFF2C2

Re: [gentoo-user] Adding an extra patch to an ebuild

[Neil Bothwick]

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On Wed, 21 Nov 2012 19:38:26 +1100, Adam Carter wrote:

> Theres a patch attached to the bug i'd like to apply. Unfortunately the
> gcc 4.7.2 ebuild doesnt have "epatch_user", so i need to take the other
> approach listed in the handbook. It suggests i use a custom environment
> but i dont understand how i would apply a patch by setting an
> environment variable. Can anyone explain?

Create /etc/portage/env/sys-devel/gcc-4.7.2 containing

post_src_unpack() {
        cd "${S}"
        epatch_user
}

to run epatch_user after the source has been unpacked. If you need to run
epatch_user after the other patches have been applied, change the function
name to post_src_prepare.

Alternatively, if this is a one-off, you could run

ebuild /path/to/ebuild prepare

then apply the patch manually in $PORTAGE_TMPDIR and complete the emerge
with

ebuild /path/to/ebuild merge


-- 
Neil Bothwick

Those who live by the sword get shot by those who don't.

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Re: [gentoo-user] Adding an extra patch to an ebuild

[Adam Carter]

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>
> Create /etc/portage/env/sys-devel/gcc-4.7.2 containing
>
> post_src_unpack() {
>         cd "${S}"
>         epatch_user
> }
>
> to run epatch_user after the source has been unpacked. If you need to run
> epatch_user after the other patches have been applied, change the function
> name to post_src_prepare.
>

Thanks Neil, this worked beautifully, as did the gcc patch and i'm running
4.7.2.

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