[8u] RFR (S) 8065215: Print warning summary at end of configure

[Severin Gehwolf]

Hi Aleksey,

On Tue, 2021-04-27 at 11:52 +0200, Aleksey Shipilev wrote:
> Original RFE:
>    https://bugs.openjdk.java.net/browse/JDK-8065215
>    https://hg.openjdk.java.net/jdk9/jdk9/rev/eefa97d0d263
> 
> I would like to backport this 8u build system change to improve error
> detection during configure. 
> This also allows cleaner backport of JDK-8079891.
> 
> The patch has a few minor differences:
>    *) There is no CUSTOM_SUMMARY_AND_WARNINGS_HOOK, no configure.ac
> hunk does not apply automatically;
>    *) There are no relevant "has been successfully created" blocks in
> help.m4;
>    *) generated-configure.sh is obviously different;
> 
> 8u webrev:
>    https://cr.openjdk.java.net/~shade/8065215/webrev.8u.01/
> 
> Testing: 8u build; injecting synthetic AS_MSG_WARN into .m4 files
> shows the warning at the end of 
> configure

This looks fine. Please be sure to freshly generate generated-
configure.sh before you push (after approval of course).

Thanks,
Severin