imath: Add version 3.1.12

[irieger]

Summary

Changes to recipe: imath/3.1.12

Motivation

Just bumping to the newest release.

Details

Improvements according to announcmenet are mainly in the build system and small improvements for the headers for compile compatibility with some platforms.

---

• Read the contributing guidelines
• Checked that this PR is not a duplicate: list of PRs by recipe
• Tested locally with at least one configuration using a recent version of Conan

[conan-center-bot]

Conan v1 pipeline ✔️

All green in build 1 (80a860c8bb707e749616e63e237f50dc898a0a65):

• imath/3.1.12:
  All packages built successfully! (All logs)

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Conan v2 pipeline ✔️

Note: Conan v2 builds are now mandatory. Please read our discussion about it.

All green in build 1 (80a860c8bb707e749616e63e237f50dc898a0a65):

• imath/3.1.12:
  All packages built successfully! (All logs)

[github-actions]

Hooks produced the following warnings for commit 80a860c

imath/3.1.12@#bbd21c8f0db65c88b3498a9ccc7b1c87

post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libImath.so' links to system library 'm' but it is not in cpp_info.system_libs.
post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libImath-3_1.so' links to system library 'm' but it is not in cpp_info.system_libs.
post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libImath-3_1_d.so' links to system library 'm' but it is not in cpp_info.system_libs.
post_package(): WARN: [MISSING SYSTEM LIBS (KB-H043)] Library './lib/libImath_d.so' links to system library 'm' but it is not in cpp_info.system_libs.

[valgur]

No significant changes to the build system: https://github.com/AcademySoftwareFoundation/Imath/compare/v3.1.11...v3.1.12?w=1
Thanks!

[ErniGH]

Thanks! 👍

[conan-center-bot]

This PR has been automatically merged due to Bump version or Bump dependencies label.
Read https://github.com/conan-io/conan-center-index/blob/master/docs/labels.md#bump-version to obtain more information.