[oe] openjdk-7 and gcc v5

[Bruce, Henry]

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 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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