RFR: 8301971: Make JDK source code UTF-8 [v3]

[Matthias Baesken]

On Mon, 14 Apr 2025 12:53:35 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

>> Most of the JDK code base has been transitioned to UTF-8, but not all. This has recently become an acute problem, since our mixing of iso-8859-1 and utf-8 in properties files confused the version of `sed` that is shipped with the new macOS 15.4.
>> 
>> The fix is basically simple, and includes the following steps:
>> * Look through the code base for text files containing non-ASCII characters, and convert them to UTF-8, if they are not already
>> * Update tooling used in building to recognize the fact that files are now in UTF-8 and treat them accordingly (basically, updating compiler flags, git attributes, etc).
>
> Magnus Ihse Bursie has updated the pull request incrementally with three additional commits since the last revision:
> 
>  - Also document UTF-8 requirements (solves JDK-8338973)
>  - Let configure only accept utf-8 locales
>  - Address review comments from Kim

make/autoconf/basic.m4 line 155:

> 153:       else
> 154:         AC_MSG_RESULT([no UTF-8 locale found])
> 155:         AC_MSG_ERROR([No UTF-8 locale found. This is required for building successfully.])

Seems we run into this 'else' part  on  AIX


checking for locale to use... no UTF-8 locale found
configure: error: No UTF-8 locale found. This is required for building successfully.
configure exiting with result code 1

maybe it would be nice to display the desired ones C.UTF-8 or en_US.UTF-8 in this message too for more clarity?  (have to check if there are other names on AIX)

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PR Review Comment: https://git.openjdk.org/jdk/pull/24574#discussion_r2046642699