Coming soon: JDK 9 Platform/Compiler upgrades at Oracle

[Martin Buchholz]

On Tue, Jun 10, 2014 at 12:29 AM, Erik Joelsson <erik.joelsson at oracle.com>
wrote:

>
> On 2014-06-10 00:27, Martin Buchholz wrote:
>
> AFAIK there is no way to build with a newer compiler and remain compatible
> with older runtimes.
>
> Are you actually using gcc 4.8 built in some magic backward-compatible way
> or are you using an older gcc?
>  If you have magic spells, please share.
>
>  It depends on what you mean by "runtime". It's true that the version of
> libstdc++ a binary requires depends only on the version of GCC used to
> compile it. When building OracleJDK, Hotspot is already statically linking
> libstdc++ to avoid these kinds of problems. For glibc, it's like David
> Holmes says, we only provide an old glibc so the compiler and linker
> accepts it. No magic unfortunately.
>


The greatest compatibility comes from old versions of all aspects of the
compilation environment.
It's safest to actually build on an old OS, else it's easy for things in
/usr/include and /usr/lib to creep into the build process (although
--sysroot helps - I assume that's what you're using to point to an old
glibc and other system libs?).