Building OpenJDK8 with musl

Building OpenJDK8 with musl

[Frieder Berthold]

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Hello to all,

I want to build a rather small Java Runtime Environment with OpenJDK8 and
the small JamVM and use musl for this purpose. Unfortunately OpenJDK needs
the header sys/sysctl.h which musl does not provide anymore ( I found older
musl version which include this header).
Is there a reason for that?

Maybe someone already tried to build OpenJDK8 with musl and could give me
some further hints?

Thanks in advance
Frieder

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Re: Building OpenJDK8 with musl

[Timo Teras]

Hi,

On Wed, 11 Nov 2015 12:11:50 +0100
Frieder Berthold <berthold.frieder@googlemail.com> wrote:

> I want to build a rather small Java Runtime Environment with OpenJDK8
> and the small JamVM and use musl for this purpose. Unfortunately
> OpenJDK needs the header sys/sysctl.h which musl does not provide
> anymore ( I found older musl version which include this header).
> Is there a reason for that?
> 
> Maybe someone already tried to build OpenJDK8 with musl and could
> give me some further hints?

We build openjdk8 for alpine linux using musl.

The build scripts are at:
http://git.alpinelinux.org/cgit/aports/tree/community/openjdk8

It uses openjdk7 (built via icedtea) to bootstrap.

The patch fix your specific issue is:
http://git.alpinelinux.org/cgit/aports/tree/community/openjdk8/icedtea-jdk-musl.patch

and as you see, sysctl.h is not really needed and can be just removed.

/Timo

Re: Building OpenJDK8 with musl

[Frieder Berthold]

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Hey Timo,

I applied the patch but then it can't find linux/types.h (musl does not
provide it) while compiling
jdk8/jdk/src/solaris/native/sun/nio/ch/sctp/Sctp.h

Did you encounter the same problem?

Frieder



2015-11-11 12:16 GMT+01:00 Timo Teras <timo.teras@iki.fi>:

> Hi,
>
> On Wed, 11 Nov 2015 12:11:50 +0100
> Frieder Berthold <berthold.frieder@googlemail.com> wrote:
>
> > I want to build a rather small Java Runtime Environment with OpenJDK8
> > and the small JamVM and use musl for this purpose. Unfortunately
> > OpenJDK needs the header sys/sysctl.h which musl does not provide
> > anymore ( I found older musl version which include this header).
> > Is there a reason for that?
> >
> > Maybe someone already tried to build OpenJDK8 with musl and could
> > give me some further hints?
>
> We build openjdk8 for alpine linux using musl.
>
> The build scripts are at:
> http://git.alpinelinux.org/cgit/aports/tree/community/openjdk8
>
> It uses openjdk7 (built via icedtea) to bootstrap.
>
> The patch fix your specific issue is:
>
> http://git.alpinelinux.org/cgit/aports/tree/community/openjdk8/icedtea-jdk-musl.patch
>
> and as you see, sysctl.h is not really needed and can be just removed.
>
> /Timo
>

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Re: Building OpenJDK8 with musl

[Natanael Copa]

On Fri, 13 Nov 2015 11:21:11 +0100
Frieder Berthold <berthold.frieder@googlemail.com> wrote:

> Hey Timo,
> 
> I applied the patch but then it can't find linux/types.h (musl does not
> provide it) while compiling
> jdk8/jdk/src/solaris/native/sun/nio/ch/sctp/Sctp.h
> 
> Did you encounter the same problem?

Yes, so we pull in linux-headers as a build time dependency.

-nc

> 
> Frieder
> 
> 
> 
> 2015-11-11 12:16 GMT+01:00 Timo Teras <timo.teras@iki.fi>:
> 
> > Hi,
> >
> > On Wed, 11 Nov 2015 12:11:50 +0100
> > Frieder Berthold <berthold.frieder@googlemail.com> wrote:
> >  
> > > I want to build a rather small Java Runtime Environment with OpenJDK8
> > > and the small JamVM and use musl for this purpose. Unfortunately
> > > OpenJDK needs the header sys/sysctl.h which musl does not provide
> > > anymore ( I found older musl version which include this header).
> > > Is there a reason for that?
> > >
> > > Maybe someone already tried to build OpenJDK8 with musl and could
> > > give me some further hints?  
> >
> > We build openjdk8 for alpine linux using musl.
> >
> > The build scripts are at:
> > http://git.alpinelinux.org/cgit/aports/tree/community/openjdk8
> >
> > It uses openjdk7 (built via icedtea) to bootstrap.
> >
> > The patch fix your specific issue is:
> >
> > http://git.alpinelinux.org/cgit/aports/tree/community/openjdk8/icedtea-jdk-musl.patch
> >
> > and as you see, sysctl.h is not really needed and can be just removed.
> >
> > /Timo
> >