[PATCH 0/3] fix build errors with gcc6

[Guido Trentalancia]

Hello.

The following set of three patches aims to fix the errors that
currently occur during compilation of OpenJDK8U with gcc6 (version
6.1.0).

Other two patches needed to build OpenJDK8U have been posted to the
core-libs-dev with a similar message subject (for a total of five
patches).

I suppose most changes are trivial, except for 3/3, and therefore most
of the patches can be applied easily.

After applying the patchset, I can now build OpenJDK8 Update and it
seems to be working fine (although it has not been extensively tested
yet).

The following build options have been used:

--enable-unlimited-crypto
--with-extra-cflags="-O3 -march=nehalem -mtune=nehalem -Wno-error
-fpermissive -fno-delete-null-pointer-checks -fno-lifetime-dse"
--with-extra-cxxflags="-O3 -march=nehalem -mtune=nehalem -Wno-error
-fpermissive -fno-delete-null-pointer-checks -fno-lifetime-dse"
--with-boot-jdk=/usr/lib64/jdk1.7.0_04

Thanks very much to Seán Coffey and Erik Joelsson for pointing me to
the right mailing list and to David Holmes for the initial review of
patch 3/3.

Regards,

Guido