RFR: 8284437: Building from different users/workspace is not always deterministic [v2]

[Maxim Kartashev]

On Wed, 6 Apr 2022 13:30:28 GMT, Andrew Leonard <aleonard at openjdk.org> wrote:

>> This PR fixes the non-deterministic behavior when building on linux with different userids or within
>> different workspace folders.
>> It fixes the following issues:
>> - MakeZipReproducible.java used to produce reproducible src.zip removes the optional zip "extra" field containing UID/GID.
>> - When absolute output paths are not allowed, enable the use of -fdebug-prefix-map to ensure debug symbol info does not contain the top level workspace folder.
>> - For reproducible builds ensure the gcc random symbol name generator is seeded using -frandom-seed.
>> - For reproducible builds when producing debug symbols use relative object paths for library linking to remove absolute MASM object paths.
>> 
>> Signed-off-by: Andrew Leonard <anleonar at redhat.com>
>
> Andrew Leonard has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Trigger checks

While we're at it, let me repeat my question from the alias:

I was wondering why were the changes in `make/autoconf/flags-cflags.m4` made under:

if test "x$TOOLCHAIN_TYPE" = xgcc; then ...

but not also propagated to the clang branch down below

elif test "x$TOOLCHAIN_TYPE" = xclang; then ...

?

It seems like the same would be required to make builds by `clang` reproducible and `clang` does support the same option, spelling and all.

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PR: https://git.openjdk.java.net/jdk/pull/8124