v3.0.1

Major release with major build restructuring, security improvements, and new features:

Restructuring:

• The IlmBase/PyIlmBase submodules have been separated into the Imath project, now included by OpenEXR via a CMake submodule dependency, fetched automatically via CMake's FetchContent if necessary.
• The library is now called libOpenEXR (instead of libIlmImf). No header files have been renamed; they retain the Imf prefix.
• Symbol linkage visibility is limited to specific public symbols. See SymbolVisibility.md for more details.

Build improvements:

• No more simultaneous static/shared build option.
• Community-provided support for bazel.
• Gnu autoconf/bootstrap/configure build setup has been retired.

New Features:

• ID Manifest Attributes, as described in "A Scheme for Storing Object ID Manifests in OpenEXR Images", Peter Hillman, DigiPro 18: Proceedings of the 8th Annual Digital Production Symposium, August 2018.
• New program: exrcheck validates the contents of an EXR file.

Changes:

• EXR files with no channels are no longer allowed.
• Hard limit on the size of deep tile sizes; tiles must be less than 2³⁰ pixels.
• Tiled DWAB files used STATIC_HUFFMAN compression.
• Int64 and SInt64 types are deprecated in favor of uint64_t and int64_t.
• Header files have been pruned of extraneous #include's ("Include What You Use"), which may generate compiler errors in application source
  code from undefined symbols or partially-defined types. These can be resolved by identifying and including the appropriate header.
• See the porting guide for details about differences from previous releases and how to address them.
• Also refer to the porting guide for details about changes to Imath.