RFR: 8278766: Enable OpenJDK build support for reproducible jars and jmods using --date [v3]

[Erik Joelsson]

On Wed, 22 Dec 2021 13:21:52 GMT, Andrew Leonard <aleonard at openjdk.org> wrote:

>> If "reproducible build" is enabled, then utilize the new --date option in the building of jar's and jmods.
>> Validating the boot jdk supports --date for the building of the jars.
>> 
>> 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:
> 
>   8278766: Enable OpenJDK build support for reproducible jars and jmods using --date
>   
>   Signed-off-by: Andrew Leonard <anleonar at redhat.com>

make/InitSupport.gmk line 317:

> 315:     export SOURCE_DATE_EPOCH := $$(SOURCE_DATE)
> 316:     ifeq ($$(IS_GNU_DATE), yes)
> 317:       SOURCE_DATE_ISO_8601 := $(shell $(DATE) --utc --date="@$(SOURCE_DATE_EPOCH)" +"%Y-%m-%dT%H:%M:%SZ" 2> /dev/null)

Are you getting this to work without `export`? I would have expected that to be needed.

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PR: https://git.openjdk.java.net/jdk/pull/6878