8211362: Restrict export of libjpeg symbols from libjavafx_iio.so

[johanvos]

Fix for JDK-8211362

Compile javafx-iio native files with -f-visibiliy=hidden in order
not to export the non-JNI symbols.
Although this issue was about libjavafx_iio.so only (and not about libjavafx_iio.a), this PR allows fixing the static build as well.

For static builds, we also use ld -r to build a static library, so that objcopy or similar can be used to remove the names of the
hidden symbols.

---

Progress

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

Issue

• JDK-8211362: Restrict export of libjpeg symbols from libjavafx_iio.so

Reviewers

• Kevin Rushforth (@kevinrushforth - Reviewer)

Download

To checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jfx pull/442/head:pull/442
$ git checkout pull/442

To update a local copy of the PR:
$ git checkout pull/442
$ git pull https://git.openjdk.java.net/jfx pull/442/head

[bridgekeeper]

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[mlbridge]

Webrevs

• 00: Full (e468be4)

[kevinrushforth]

Looks good. Test build passed. I confirmed that the internal jpeg symbols are now hidden.

[openjdk]

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

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

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

8211362: Restrict export of libjpeg symbols from libjavafx_iio.so

Reviewed-by: kcr

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

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[johanvos]

/integrate

[openjdk]

@johanvos Pushed as commit ed5cfe7.

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