8247589: Implementation of Alpine Linux/x64 Port

[yftsai]

Other commits relating to Alpine Linux/x86 Port are included.

2845c3d 8245938: Remove unused print_stack(void) method from XToolkit.c
5490b03 8252248: __SIGRTMAX is not declared in musl libc
b957d80 8252250: isnanf is obsolete

The following commit is not included, but related change in jdk_util_md.h is added.

993b1b0 8249612: Remove unused ISNANF and ISNAND from jdk_util_md.h

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Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8247589: Implementation of Alpine Linux/x64 Port

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk11u-dev pull/827/head:pull/827
$ git checkout pull/827

Update a local copy of the PR:
$ git checkout pull/827
$ git pull https://git.openjdk.java.net/jdk11u-dev pull/827/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 827

View PR using the GUI difftool:
$ git pr show -t 827

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk11u-dev/pull/827.diff

[bridgekeeper]

👋 Welcome back yftsai! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

This backport pull request has now been updated with issue from the original commit.

[mlbridge]

Webrevs

• 00: Full (57ff241d)

[yftsai]

Bellsoft plans to propose a backport. This PR is withdrawn in favor of the plan.