RFR: JDK-8030794: Update configure to require jdk8 as boot

[Mike Duigou]

When this is changeset is pushed please send message out to jdk9-dev to inform everyone that the change has been made. Will you be pushing it to jdk9/dev or jdk9/build?

Mike

On Apr 16 2014, at 03:01 , Erik Joelsson <erik.joelsson at oracle.com> wrote:

> There are now changes in jdk9 which prohibit the use of jdk7 as boot jdk (unless the update version is high enough). It's time we formally change the requirement from jdk7 to jdk8 by making configure require it.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8030794
> Patch:
> 
> diff -r 1dfbd8aa5d3d common/autoconf/boot-jdk.m4
> --- a/common/autoconf/boot-jdk.m4
> +++ b/common/autoconf/boot-jdk.m4
> @@ -82,10 +82,10 @@
>             BOOT_JDK_VERSION=`"$BOOT_JDK/bin/java" -version 2>&1 | head -n 1`
> 
>             # Extra M4 quote needed to protect [] in grep expression.
> -            [FOUND_CORRECT_VERSION=`echo $BOOT_JDK_VERSION | grep '\"1\.[789]\.'`]
> +            [FOUND_CORRECT_VERSION=`echo $BOOT_JDK_VERSION | grep '\"1\.[89]\.'`]
>             if test "x$FOUND_CORRECT_VERSION" = x; then
>               AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK is incorrect JDK version ($BOOT_JDK_VERSION); ignoring])
> -              AC_MSG_NOTICE([(Your Boot JDK must be version 7, 8 or 9)])
> +              AC_MSG_NOTICE([(Your Boot JDK must be version 8 or 9)])
>               BOOT_JDK_FOUND=no
>             else
>               # We're done! :-)
>