OSL v1.14.4.0-beta1

This is the first beta release of OSL 1.14. We are shooting for an official production-ready 1.14 release by the end of the March (sooner if no issues are reported). Please test and let us know if there are any problems. Once out of beta, this will be the officially supported stable release for 2025.

If all goes well, there will be no additional non-back-compatible changes, but it's possible for this to happen until the "beta" designation is removed, so use some caution. Preliminary release notes are below:

Release 1.14 (beta1 - 4 Mar 2025) -- compared to 1.13

• v1.14.4.0-beta1 - 4 Mar 2025

New minimum dependencies, toolchain, and compatibility changes:

• C++: Raise C++ standard to 17 (from 14), gcc min to 9.3 (from 6.3), clang min to 5.0 #1847 (1.14.2.0)
• Python: Raise Python minimum to 3.7 (from 2.7), pybind11 to 2.7 (from 2.4) #1855 (1.14.2.0)
• Imath: Raise Imath minimum to 3.1 (from 2.4) #1853 (1.14.2.0)
• CMake 3.19 #1914
• OpenImageIO: Raise minimum to 2.5. #1914
  Note that it is likely that 1.14 is the last release family that will support OIIO 2.x, and beginning with next year's OSL release, OpenImageIO 3.0+ will be the new minimum.
• LLVM: New minimum LLVM release is 11.0. #1914
• NO Boost: Boost is no longer a dependency of OSL.

✏️ OSL Language, standard library, and oslc compiler (for shader writers):

• Fix the subsurface_bssrdf parameters to conform to MaterialX. #1823 (by Christopher Kulla) (1.14.1.0)
• Fix bugs in vector2.h, vector4.h, color2.h, color4.h, docs #1892 (1.14.3.0)
• bsdf: Anisotropic_vdf closure should not set IOR #1870 (by Christopher Kulla) (1.14.3.0)
• bsdf: Add hair_chiang_bsdf closure definition from MaterialX #1891 (by Christopher Kulla) (1.14.3.0)

☀️ testshade/testrender/osltoy improvements

• testrender: Implement new Oren-Nayar model from OpenPBR #1817 (by Christopher Kulla) (1.14.1.0)
• testrender: Implement OpenPBR's sheen BRDF #1819 (by Christopher Kulla) (1.14.1.0)
• testrender: Modify testrender to work with triangle meshes #1865 (by Christopher Kulla) (1.14.3.0)
• testrender: OptiX testrender overhaul (take two) #1897 (by Tim Grant) (1.14.3.0)
• testrender: Full OptiX support in testrender #1896 #1897 (by Tim Grant) (1.14.3.0)
• testrender: Implement new Oren-Nayar model from OpenPBR #1817 (by Christopher Kulla) (1.14.1.0)
• testrender: Implement OpenPBR's sheen BRDF #1819 (by Christopher Kulla) (1.14.1.0)
• testrender: Implement basic displacement shader support #1898 (by Christopher Kulla)
• testrender: Improvements to energy conservation between layered BSDFs #1935 (by Jonathan Stone)
• osltoy: Add command line and GUI ways to adjust include search paths #1876 (by Maxwell Iverson) (1.14.3.0)

⛰️ API changes and new ShadingSystem features (for renderer writers):

• The big switch to ustringhash: To better accommodate GPU execution, and to make the code and techniques less divergent between CPU and GPU code paths, we have changed the runtime representation of strings from ustring to ustringhash -- which is still a 64 bit token, but rather than the address of the unique characters, which may change from run to run and harm the OptiX/CUDA PTX cache performance, it is the deterministic hash of the characters. Thus, not just the runtime, but all of the interfaces of RendererServices and other APIs that the renderers use to set up and communicate with the ShadingSystem, now have been changed to expect ustringhash instead of ustring. #1732 (by Steena Monteiro) (1.14.0.0)
• Add API for building interpolated getter free functions. #1765 (by Thibault Vergne) (1.14.0.0)
• Switch shade_image() to use current OIIO::paropt #1843 (1.14.1.1)
• Free functions for texturing, point clouds, and trace #1852 (by Curtis Black) (1.14.3.0)
• Switch to a 2-level namespace #1922
• Add ShadingSystem query to ask if attribute derivatives are requested. #1932 (by Curtis Black) (and subsequent OptiX related fixes in #1951)
• RendererServices API for renderer to cache key/value pairs. This is currently used to cache ptx generation for OptiX/GPU rendering. #1938 (by Chris Hellmuth)

🚀 SIMD batched shading mode

• Codegen bug for compref with varying index #1776 (by Alex Wells) (1.14.1.0)
• Add support for b4_SSE2 batched mode. #1825 (by johnfea) (1.14.2.0)
• fix: Assume BatchedRendererServices texture derivatives are in st space. #1828 (by sfriedmapixar) (1.14.2.0)

🚀 OptiX GPU rendering

• Fix NVPTX TargetMachine leak, etc. #1763 (by Tim Grant) (1.14.0.0)
• Fix GPU interpolated param initialization #1791 (by Chris Hellmuth) (1.14.1.0)
• Add lazytrace ShadingSystem option to avoid combinatoric optixTrace inlining: when enabled, run layers with trace ops unconditionally at the start of shader evaluation. This costs some potential performance in cases where the trace layer would never be evaluated, but removes all the compilation penalties that the inlining was presenting. #1815 (by Chris Hellmuth) (1.14.1.0)
• Mock gpu pointcloud_search calls with empty custom attributes #1859 (by Chris Hellmuth) (1.14.2.0)
• Fix the OptiX path in testrender and testshade #1896 (by Tim Grant) (1.14.3.0)
• OptiX testrender overhaul (take two) #1897 (by Tim Grant) (1.14.3.0)
• RendererServices API for renderer to cache key/value pairs. This is currently used to cache ptx generation for OptiX/GPU rendering. #1938 (by Chris Hellmuth)
• Generate symbol derivatives for outputs when requested #1916 (by Lukas Stockner)

🐛/🔧 Internals: fixes, improvements, and developer concerns

• Mute partio error prints #1774 (by olegul) (1.14.1.0)
• calculatenormal needs to use the fliphandedness global #1783 (by sfriedmapixar) (1.14.1.0)
• Print closure missing error message at compile time instead of run time. #1781 (by sfriedmapixar) (1.14.1.0)
• Make isconnected() work with downstream renderer "connections." #1782 (by sfriedmapixar) (1.14.1.0)
• int: Change OSL_CONSTEXPR14 to constexpr #1805 (1.14.1.0)
• Remove unnecessary ustring lookup #1824 (by Chris Hellmuth) (1.14.1.0)
• Make backfacing shadeop indicate backfacing shader-global is needed [#1827](#1...

v1.13.12.0

Release 1.13.12.0 -- 4 Dec 2024 (compared to 1.13.11.0)

• bsdfs: Anisotropic_vdf closure should not set IOR #1870 (by Christopher Kulla)
• shaders: Bugs in vector2.h, vector4.h, color2.h, color4.h, docs #1892
• build: Support for LLVM 19 #1873
• build: Fix LLVM find package picking up system-wide libraries #1866 (by Sergey Sharybin)
• build: Fixes for supporting OIIO 3.0 #1881 #1885 #1888
• fix: Typo in dual.h made invalid template DualStorage #1871
• ci: Add VFX Platform 2024 to CI #1854
• ci: Deal with OIIO renaming its master -> main #1867
• ci: Various adjustments for OIIO 3.0 becoming the release #1901
• ci: Fix broken CI for ASWF 2021 and 2022 containers #1905
• ci: Only test against maximum OpenImageIO 2.5.17.0 (because it doesn't
  yet build properly against OIIO 3.0)

NOTE: v1.13.12.0 does NOT build against OpenImageIO 3.0. We may yet make a future 1.13.x compatible with OIIO 3.x, but if you need OIIO 3.x you may need to switch to OSL 1.14, which will imminently have a beta release.

Release: OSL v1.13.11.0

Release 1.13.11.0 -- 1 Sep 2024 (compared to 1.13.10.0)

• fix/batched: Assume BatchedRendererServices texture derivatives are in st space. #1828 (by sfriedmapixar) (1.13.10.0)
• fix: Make backfacing shadeop indicate backfacing shader-global is needed #1827 (by sfriedmapixar) (1.13.10.0)
• deps: Handle various OpenImageIO deprecations and changes in the run-up to OIIO 3.0 #1834 #1806 #1838 #1842 #1850 (1.13.10.0)
• deps: Adjust to OIIO change to IC/TS API #1848 (1.13.10.0)
• deps: Llvm 18 compat issue - include libclangAPINotes #1812 (1.13.10.0)
• deps: Make finding bison work better on Apple Silicon Macs + homebrew #1822 (1.13.10.0)
• ci: Mods to CI to deal with OIIO master raising dependency mins #1833 (1.13.10.0)
• ci: Deal with CentOS 7 EOL and disappearance of yum mirrors #1839 (1.13.10.0)
• ci: Fix GHA CI after they upgraded nodejs #1837 (1.13.10.0)
• admin: Change release notice icon to use the icon vs the normal logo so it shows up better #1777 (by John Mertic) (1.13.10.0)

OSL v1.13.10.0

Release 1.13.10.0 -- 1 June 2024 (compared to 1.13.9.0)

• testrender: Implement new Oren-Nayar model from OpenPBR #1817 (by Christopher Kulla)
• docs: Fix outdated or wrong repo URLs #1811

OSL v1.13.9.0

Release 1.13.9.0 -- 1 May 2024 (compared to 1.13.8.0)

• deps: Support for LLVM-18 #1773 (by مهدي شينون (Mehdi Chinoune) #1803 (by Larry Gritz)
• fix: Make isconnected() work with downstream renderer "connections." #1782 (by sfriedmapixar)
• cleanup: Change OSL_CONSTEXPR14 to constexpr #1805
• internals build: Fix ifdef typo #1804
• build: Propagate cpp version #1797
• build: Print commit hash of locally built dependencies #1798
• ci: Lock down to OIIO 2.5 for icc tests #1799
• ci: Suppress leak sanitizer warnings about internals of robin_hash #1807
• docs: More detail about supported platforms in INSTALL.md #1796

OSL v1.13.8.0

Release 1.13.8.0 -- 1 Apr 2024 (compared to 1.13.7.0)

• fix(batched): Codegen bug for compref with varying index for batched shading #1776 (by Alex Wells)
• fix: Calculatenormal needs fliphandedness #1783 (by sfriedmapixar)
• fix: Print closure missing error message at compile time instead of run time. #1781 (by sfriedmapixar)
• int: Change long-deprecated OIIO macro to new one #1788
• ci: Fix broken Macos-13 CI #1780

OSL v1.13.7.0

Release 1.13.7.0 -- 1 Mar 2024 (compared to 1.13.6.1)

• fix: Mute partio error prints #1774 (by olegul)
• ci: Test with Mac ARM runner #1770
• docs: Fix links to RTD docs from github landing page #1768
• admin: Switch release announcement workflow to jmertic's awesome action #1766

OSL v1.13.6.1

This is the first official supported release of the 1.13 series. The 1.12 series is now considered obsolete and will receive patches only occasionally, and for the most critical fixes.

Release 1.13 -- Feb 1, 2024 (compared to 1.12)

New minimum dependencies and compatibility changes:

• For GPU/OptiX mode, OptiX 6.0 support has been removed. For GPU rendering
  with OptiX, a minimum of OptiX 7.0 is required, and the Cuda minimum has
  been raised to 9.0 #1737
• The minimum version OpenImageIO has been raised from 2.2 to 2.4. #1591 #1722
• The minimum CMake dependency has been raised from 3.12 to 3.15
  #1724 (1.13.5.0)
• The minimum Imath/OpenEXR has been raised from 2.3 to 2.4. (Note: OSL 1.13
  is probably the last major release family that will support Imath/OpenEXR
  2.x.)

OSL Language and oslc compiler:

• There have been no substantive changes to the OSL language in this release.

⛰️ API changes, new options, new ShadingSystem features (for renderer writers):

• A new shadingStateUniform pointer field was added to ShaderGlobals for
  planned future expansion and improved GPU support. #1585 (1.13.1.0)
• Adding relaxed type-equivalency to ReParameter() #1639 (by cmstein) (1.13.2.1)
• Expose llvm groupdata size as a shadergroup attribute
  #1642 (by Chris Hellmuth) (1.13.4.0)
• RendererServices API for letting get_texture_handle consider colorspace
  #1641 (1.13.4.0)
• Make "compile_report" attribute an int instead of just 0/1. Passing 1 makes
  a brief report, values >1 are more verbose. (Zero still prints no report.)
  #1654 (1.13.4.0)
• Switch lockgeom to interpolated and interactive. The lockgeom=0
  was confusing. Now we use interpolated=1 to mean "don't optimize it away
  because it might be interpolated across the geometry and thus won't have
  the same value at all points being shaded," and the subtly different
  interactive=1 to mean "don't optimize it away because although it will
  always take on the same value at all points at the same time, the user
  might want to interactively adjust the value and we don't want to have
  to recompile the shader group if that happens."
  #1662 (1.13.4.0)
• Add type information for needed attributes. #1650 (by Curtis Black) (1.13.4.0)
• Add API for building attribute getter free functions.
  #1704 (by Curtis Black) (1.13.5.0)
• Rs fmt specification - Journaling Algorithm for error, warning, fprintf
  #1702 (by Steena Monteiro) #1711 #1715 (1.13.5.0)

🚀 SIMD batched shading mode

• Fix some array overruns (asymptomatic, but still potentially buggy) in
  common_ancestor_between. #1577 (1.13.0.2)
• Fix issue with closure keyword parameters. #1620 (1.13.2.0/1.12.8.0)
• Fix crash when adding a default initialized closure. #1624
  (1.13.2.0/1.12.8.0)
• Fix support for closures with array types. #1630 (1.13.2.0/1.12.8.0)
• Fix bug with masked wide llvm_gen_closure() #1637 (by danieldresser-ie) (1.13.2.1)
• Fix Force LLVM Boolean #1717 (by Alex Wells)
• Batched pointcloud if "index" is not passed #1753 (by Alex Wells)

🚀 OptiX GPU rendering

• OptiX 6.0 support has been removed. For GPU rendering with OptiX, a minimum
  of OptiX 7.0 is required.
• Big overhaul/simplification of how strings are represented on the GPU: the
  extra level of indirection to global variables is removed, and strings are
  simply represented in ordinary variables as the hash of their characters.
  #1531 (1.13.0.0) #1553 (1.13.0.1)
• Better PTX cache hit rate by eliminating several sources of not being
  strictly deterministic in the PTX text we were generating. #1566 #1570
  (1.13.0.1)
• Fix PTX symbol visibility issues. #1609 (1.13.2.0)
• Hide more code that is only used for OptiX mode, when OptiX is disabled.
  #1608 (1.13.2.0)
• Remove dependency on OptiX SDK for building core OSL with OptiX support. You
  can now build OSL with OptiX support enabled even if you don't have the
  OptiX SDK headers present at build time. But you will still need them to
  build your OptiX-based application that uses OSL for GPU rendering. #1627
  (1.13.2.0/1.12.8.0)
• GPU/OptiX support of ReParameter #1686 (1.13.4.0)
• Fix userdata derivatives for interpolated params on GPU #1685 (by Pascal Lecocq) (1.13.4.0)
• Enable userdata derivatives for interpolated params on GPU
  #1657 (by Chris Hellmuth) (1.13.4.0)
• Move qualifying GroupData params onto stack for higher performance.
  #1710 (by Chris Hellmuth) (1.13.5.0)
• Handle mixed string casting that plagues optix codegen #1718 (1.13.5.0)
• Add missing members to ShaderGlobals in rend_lib.h #1721 (by Tim Grant) (1.13.5.0)
• OptiX direct callable API that owns groupdata buffer
  #1683 (by Chris Hellmuth) (1.13.5.0)
• OptiX PTX pipeline overhaul #1680 (by Tim Grant) (1.13.5.0)
• Perf: Don't insert redundant run layer calls inside a basic block
  #1665 #1669 #1672 (by Chris Hellmuth) (1.13.4.0)
• Fix NVPTX TargetMachine leak, etc. #1763 (by Tim Grant)

🐛/🔧 Internals: fixes, improvements, and developer concerns

• Fix memory leak in oslc ASTvariable_declaration. #1576 (1.13.0.2)
• Fix memory leaks in LPE code in error conditions. #1593 #1594 (1.13.0.3)
• Fix mismatched strides when calling OCIO for transformc with derivs #1646 (1.13.4.0)
• Set up ray types for testrender #1648 (1.13.4.0)
• Fix userdata binding corner case #1673 (by Alejandro Conty) (1.13.4.0)
• Fix constant float values being converted to ints #1674 (by Declan Russell) (1.13.4.0)
• Don't try to ReParameter symbols not in the group #1693 (by Alejandro Conty) (1.13.5.0)
• Have ReParameter only copy data when it changes #1698 (1.13.5.0)
• Avoid deprecated OSLQuery ctr in test example #1699 (1.13.5.0)
• Zero derivs for interactive params when needed #1700 (by Alejandro Conty) (1.13.5.0)
• oslc bug fix: shader params whose default values involve "init ops" could be
  incorrectly initialized if their values came from instance parameters set to
  zero. #1578 (1.13.0.2)
• oslc: Add missing fmod() variants #1643 (1.13.4.0)
• Simple constant folding of binary expressions now happen on the oslc side
  #1653 (1.13.4.0)
• platform.h:
  • New OSL_ALLOCA macro to allocate on the stack. #1589 (1.13.0.3)
  • Define OSL::bitcast utility. #1610 (1.13.2.0)
• Make sure that std::hash is defined for ustring and ustringhash. #1599
  (1.13.1.1)
• Deprecate LLVMUtil::internalize_module_functions. #1606 (1.13.1.0)
• Work toward always representing strings in shaders as ustringhash rather
  than ustring: phase 1 #1603 phase2 #1612 (1.13.2.0) #1726 (1.13.5.0)
• Remove unnecessary setting of locale::global #1636 (by danieldresser-ie) (1.13.2.1)
• Fully define bitcast template [#1635](https://github.com/AcademySo...

OSL v1.13.6.0 BETA 1

This is the first beta release of OSL 1.13. We are shooting for January 15 for an official production-ready 1.13 release. Please test and let us know if there are any problems. Once out of beta, this will be the officially supported stable release for 2024.

If all goes well, there will be no additional non-back-compatible changes, but it's possible for this to happen until the "beta" designation is removed, so use some caution. Preliminary release notes are below:

Release 1.13 -- beta 1: December 20, 2023 (compared to 1.12)

New minimum dependencies and compatibility changes:

• For GPU/OptiX mode, OptiX 6.0 support has been removed. For GPU rendering
  with OptiX, a minimum of OptiX 7.0 is required, and the Cuda minimum has
  been raised to 9.0 #1737
• The minimum version OpenImageIO has been raised from 2.2 to 2.4. #1591 #1722
• The minimum CMake dependency has been raised from 3.12 to 3.15
  #1724 (1.13.5.0)
• The minimum Imath/OpenEXR has been raised from 2.3 to 2.4. (Note: OSL 1.13
  is probably the last major release family that will support Imath/OpenEXR
  2.x.)

OSL Language and oslc compiler:

• There have been no substantive changes to the OSL language in this release.

⛰️ API changes, new options, new ShadingSystem features (for renderer writers):

• A new shadingStateUniform pointer field was added to ShaderGlobals for
  planned future expansion and improved GPU support. #1585 (1.13.1.0)
• Adding relaxed type-equivalency to ReParameter() #1639 (by cmstein) (1.13.2.1)
• Expose llvm groupdata size as a shadergroup attribute
  #1642 (by Chris Hellmuth) (1.13.4.0)
• RendererServices API for letting get_texture_handle consider colorspace
  #1641 (1.13.4.0)
• Make "compile_report" attribute an int instead of just 0/1. Passing 1 makes
  a brief report, values >1 are more verbose. (Zero still prints no report.)
  #1654 (1.13.4.0)
• Switch lockgeom to interpolated and interactive. The lockgeom=0
  was confusing. Now we use interpolated=1 to mean "don't optimize it away
  because it might be interpolated across the geometry and thus won't have
  the same value at all points being shaded," and the subtly different
  interactive=1 to mean "don't optimize it away because although it will
  always take on the same value at all points at the same time, the user
  might want to interactively adjust the value and we don't want to have
  to recompile the shader group if that happens."
  #1662 (1.13.4.0)
• Add type information for needed attributes. #1650 (by Curtis Black) (1.13.4.0)
• Add API for building attribute getter free functions.
  #1704 (by Curtis Black) (1.13.5.0)
• Rs fmt specification - Journaling Algorithm for error, warning, fprintf
  #1702 (by Steena Monteiro) #1711 #1715 (1.13.5.0)

🚀 SIMD batched shading mode

• Fix some array overruns (asymptomatic, but still potentially buggy) in
  common_ancestor_between. #1577 (1.13.0.2)
• Fix issue with closure keyword parameters. #1620 (1.13.2.0/1.12.8.0)
• Fix crash when adding a default initialized closure. #1624
  (1.13.2.0/1.12.8.0)
• Fix support for closures with array types. #1630 (1.13.2.0/1.12.8.0)
• Fix bug with masked wide llvm_gen_closure() #1637 (by danieldresser-ie) (1.13.2.1)
• Fix Force LLVM Boolean #1717 (by Alex Wells)
• Batched pointcloud if "index" is not passed #1753 (by Alex Wells)

🚀 OptiX GPU rendering

• OptiX 6.0 support has been removed. For GPU rendering with OptiX, a minimum
  of OptiX 7.0 is required.
• Big overhaul/simplification of how strings are represented on the GPU: the
  extra level of indirection to global variables is removed, and strings are
  simply represented in ordinary variables as the hash of their characters.
  #1531 (1.13.0.0) #1553 (1.13.0.1)
• Better PTX cache hit rate by eliminating several sources of not being
  strictly deterministic in the PTX text we were generating. #1566 #1570
  (1.13.0.1)
• Fix PTX symbol visibility issues. #1609 (1.13.2.0)
• Hide more code that is only used for OptiX mode, when OptiX is disabled.
  #1608 (1.13.2.0)
• Remove dependency on OptiX SDK for building core OSL with OptiX support. You
  can now build OSL with OptiX support enabled even if you don't have the
  OptiX SDK headers present at build time. But you will still need them to
  build your OptiX-based application that uses OSL for GPU rendering. #1627
  (1.13.2.0/1.12.8.0)
• GPU/OptiX support of ReParameter #1686 (1.13.4.0)
• Fix userdata derivatives for interpolated params on GPU #1685 (by Pascal Lecocq) (1.13.4.0)
• Enable userdata derivatives for interpolated params on GPU
  #1657 (by Chris Hellmuth) (1.13.4.0)
• Move qualifying GroupData params onto stack for higher performance.
  #1710 (by Chris Hellmuth) (1.13.5.0)
• Handle mixed string casting that plagues optix codegen #1718 (1.13.5.0)
• Add missing members to ShaderGlobals in rend_lib.h #1721 (by Tim Grant) (1.13.5.0)
• OptiX direct callable API that owns groupdata buffer
  #1683 (by Chris Hellmuth) (1.13.5.0)
• OptiX PTX pipeline overhaul #1680 (by Tim Grant) (1.13.5.0)
• Perf: Don't insert redundant run layer calls inside a basic block
  #1665 #1669 #1672 (by Chris Hellmuth) (1.13.4.0)

🐛/🔧 Internals: fixes, improvements, and developer concerns

• Fix memory leak in oslc ASTvariable_declaration. #1576 (1.13.0.2)
• Fix memory leaks in LPE code in error conditions. #1593 #1594 (1.13.0.3)
• Fix mismatched strides when calling OCIO for transformc with derivs #1646 (1.13.4.0)
• Set up ray types for testrender #1648 (1.13.4.0)
• Fix userdata binding corner case #1673 (by Alejandro Conty) (1.13.4.0)
• Fix constant float values being converted to ints #1674 (by Declan Russell) (1.13.4.0)
• Don't try to ReParameter symbols not in the group #1693 (by Alejandro Conty) (1.13.5.0)
• Have ReParameter only copy data when it changes #1698 (1.13.5.0)
• Avoid deprecated OSLQuery ctr in test example #1699 (1.13.5.0)
• Zero derivs for interactive params when needed #1700 (by Alejandro Conty) (1.13.5.0)
• oslc bug fix: shader params whose default values involve "init ops" could be
  incorrectly initialized if their values came from instance parameters set to
  zero. #1578 (1.13.0.2)
• oslc: Add missing fmod() variants #1643 (1.13.4.0)
• Simple constant folding of binary expressions now happen on the oslc side
  #1653 (1.13.4.0)
• platform.h:
  • New OSL_ALLOCA macro to allocate on the stack. #1589 (1.13.0.3)
  • Define OSL::bitcast utility. #1610 (1.13.2.0)
• Make sure that std::hash is defined for ustring and ustringhash. #1599
  (1.13.1.1)
• Deprecate LLVMUtil::internalize_module_functions. #1606 (1.13.1.0)
• Work toward always representing strings in shaders as ustringhash rather
  than ustring: phase 1 #1603 phase2 #1612 (1.13.2.0) #1726 (1.13.5.0)
• Remove unnecessary setting of local...

OSL v1.12.14.0

Release 1.12.14.0 -- 1 Nov 2023 (compared to 1.12.13.0)

• Correctly document that our Cuda minimum is 9.0. #1737
• Fixes to build and test against OpenImageIO 2.5 #1742
• Fix default fmt logic changing in latest openimageio release #1725