RFR: 8323672: Suppress unwanted autoconf added flags in CC and CXX [v7]

[Erik Joelsson]

On Fri, 19 Jan 2024 14:14:46 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> In contrast with Erik I'm not so worried about future breakage. Autoconf has basically stalled in development since decades. If someone were to pick up development again (like what happened with GNU Make) we will surely see signs of activity long before this breaks. And if that happens, we can just file a bug on autoconf instead of trying to work around the broken behaviour, right? 🤷

If you are ok with this, then I am too, just wanted to be thorough with possible concerns. I would just like to point out that it was a change in autoconf behavior that triggered this whole ordeal in the first place, so saying nothing is happening doesn't exactly seem true. The way I see it, if they change one of the sub/internal macros in an incompatible way, then we will just have to keep inlining the old versions of such macros in our configure script to work around it.

I still think it would be prudent to verify this patch with all the currently accepted versions of autoconf (2.69, 2.70, 2.71, 2.72).

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PR Comment: https://git.openjdk.org/jdk/pull/17401#issuecomment-1901126832