Fixed by defining GST_API as GST_EXPORT for gcc compiler as per Kevin proposed solution. On Windows we do not need to define GST_API, since we using .def file to export symbols.
------------- Commit messages: - 8252060: gstreamer fails to build with gcc 10 Changes: https://git.openjdk.java.net/jfx/pull/287/files Webrev: https://webrevs.openjdk.java.net/jfx/287/webrev.00 Issue: https://bugs.openjdk.java.net/browse/JDK-8252060 Stats: 5 lines in 1 file changed: 4 ins; 0 del; 1 mod Patch: https://git.openjdk.java.net/jfx/pull/287.diff Fetch: git fetch https://git.openjdk.java.net/jfx pull/287/head:pull/287 PR: https://git.openjdk.java.net/jfx/pull/287