[oe] openjdk-7 and gcc v5

[Huang, Jie (Jackie)]

> -----Original Message-----
> From: openembedded-devel-bounces at lists.openembedded.org [mailto:openembedded-devel-
> bounces at lists.openembedded.org] On Behalf Of Bruce, Henry
> Sent: Friday, November 06, 2015 3:22 AM
> To: openembedded-devel at lists.openembedded.org
> Subject: Re: [oe] openjdk-7 and gcc v5
> 
> On Tue, 2015-11-03 at 11:32 -0800, Khem Raj wrote:
> > > On Nov 3, 2015, at 10:18 AM, Bruce, Henry <henry.bruce at intel.com>
> > > wrote:
> > >
> > > On Thu, 2015-10-29 at 17:43 -0700, Khem Raj wrote:
> > > > On Thu, Oct 29, 2015 at 4:00 PM, Bruce, Henry <
> > > > henry.bruce at intel.com>
> > > > wrote:
> > > > > Many thanks to contributors who fixed openjdk build issues
> > > > > introduced by gcc v5 and for maintainers for pushing the
> > > > > updates.
> > > > > However one problem remains: openjdk build fails in
> > > > > openjdk/jdk/make/java/nio due to -static compiler flag being
> > > > > used
> > > > > in conjunction with -pthread giving error
> > > > > /usr/bin/ld: cannot find -lpthread
> > > > > /usr/bin/ld: cannot find -lc
> > > > >
> > > >
> > > > its not clear how the -static flag can cause this. may be its
> > > > using
> > > > CC for LD or wise versa ?
> > >
> > > Not clear to me either, but if you create a simple file, say test.c
> > >
> > > int main()
> > > {
> > >  return 0;
> > > }
> > >
> > > and compile with gcc test.c -pthread -static
> > > it fails as follows with gcc v5
> > > /usr/bin/ld: cannot find -lpthread
> > > /usr/bin/ld: cannot find -lc
> > >
> > > but compiles OK with earlier versions of gcc.
> >
> > isn’t this gcc on your build host ?
> 
> Yes, it is the gcc on my build host.
> The openjdk recipe causes this specific makefile to build with
> ${CC_FOR_BUILD} which is "gcc" not ${CC}.

I think it's not related to the gcc version, I met this error in my host with
gcc 4.4.7, it's because the static library libpthread.a is not installed.

The "-static" option was added by the patch icedtea-jdk-build-nio-gensor-genuc-gensc-static.patch
which I think is inappropriate and no evidence or comments explaining why it needs static builds,
so I sent a patch to drop the patch.

Thanks,
Jackie

> 
> 
> >
> >
> > >
> > > >
> > > > > I fixed this by removing -static flag from Makefile. Not sure
> > > > > of
> > > > > this was the right thing to do (so I didn't submit patch) but
> > > > > it
> > > > > worked for me.
> > > > > I added the following to the an openjdk bbappend and it fixed
> > > > > the
> > > > > build and resulting jre is running OK.
> > > > >
> > > > > do_configure_append() {
> > > > >        gcc -v 2>&1 | grep 5\..
> > > > >        if [ "$?" == "0" ]; then
> > > >
> > > > why this check for gcc ?
> > >
> > > It only fails with gcc v5, so if it's not broken, don't fix it...
> > >
> > > >
> > > > >                sed -i s/-static//
> > > > > ${B}/openjdk/jdk/make/java/nio/Makefile
> > > > >        fi
> > > > > }
> > > > >
> > > > > Regards,
> > > > >
> > > > > Henry Bruce
> > > > >
> > > > > --
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> > > > > Openembedded-devel at lists.openembedded.org
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> > > > > el
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