8357657: [11u][windows] cannot stat '/jdk.crypto.ec/*': No such file or directory

[mrserb]

This patch provides a workaround for a bug in the latest version of Cygwin. Only JDK 11 is affected; newer versions are not impacted because the makefiles were updated by JDK-8220383.

The issue is that:
ifneq ($(wildcard $(IMPORT_MODULES_CLASSES)/$(MODULE)), )
returns results even when IMPORT_MODULES_CLASSES is empty/unset. This causes the build to incorrectly search for a module like /jdk.crypto.ec/, which fails because the directory does not exist.

The fix is to first check whether IMPORT_MODULES_CLASSES is set. If it is, we define IMPORT_MODULE_DIR as $(IMPORT_MODULES_CLASSES)/$(MODULE) and use this property consistently throughout the build. This matches the approach introduced in JDK-8220383 for this codepath.

---

Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• JDK-8357657 needs maintainer approval

Issue

• JDK-8357657: [11u][windows] cannot stat '/jdk.crypto.ec/*': No such file or directory (Bug - P3 - Approved)

Reviewers

• Aleksey Shipilev (@shipilev - Reviewer)

Reviewing

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Update a local copy of the PR:
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[bridgekeeper]

👋 Welcome back serb! 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]

@mrserb This change now passes all automated pre-integration checks.

After integration, the commit message for the final commit will be:

8357657: [11u][windows] cannot stat '/jdk.crypto.ec/*': No such file or directory

Reviewed-by: shade

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[bridgekeeper]

@mrserb This pull request has been inactive for more than 8 weeks and will be automatically closed if another 8 weeks passes without any activity. To avoid this, simply issue a /touch or /keepalive command to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!

[mrserb]

/touch

[openjdk]

@mrserb The pull request is being re-evaluated and the inactivity timeout has been reset.

[mlbridge]

Webrevs

• 01: Full - Incremental (8d692ff9)
• 00: Full (bc43ddef)

[bridgekeeper]

@mrserb This pull request has been inactive for more than 4 weeks and will be automatically closed if another 4 weeks passes without any activity. To avoid this, simply issue a /touch or /keepalive command to the pull request. Feel free to ask for assistance if you need help with progressing this pull request towards integration!

[mrserb]

/keepalive

[openjdk]

@mrserb The pull request is being re-evaluated and the inactivity timeout has been reset.

[shipilev]

OK, so this effectively takes the first two hunks from openjdk/jdk@2af935c. I think it is reasonable to pull it in selectively into 11u. Have you considered backporting JDK-8220383 wholesale? I am guessing it is more risky?

[openjdk]

⚠️ @mrserb This change is now ready for you to apply for maintainer approval. This can be done directly in each associated issue or by using the /approval command.

[mrserb]

I am guessing it is more risky?

Correct.

[mrserb]

/approval request
This patch adds a workaround for a bug in the latest Cygwin version. It has been tested on both new and old versions of Cygwin.

[openjdk]

@mrserb
8357657: The approval request has been created successfully.

[mrserb]

/integrate

[openjdk]

Going to push as commit 912a12b.

[openjdk]

@mrserb Pushed as commit 912a12b.

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