4 files changed, 58 insertions, 12 deletions
diff --git a/graphics/OpenShadingLanguage/OpenShadingLanguage.SlackBuild b/graphics/OpenShadingLanguage/OpenShadingLanguage.SlackBuild
index b523911764..4cf361461f 100644
--- a/graphics/OpenShadingLanguage/OpenShadingLanguage.SlackBuild
+++ b/graphics/OpenShadingLanguage/OpenShadingLanguage.SlackBuild
@@ -2,7 +2,7 @@
 
 # Slackware build script for OpenShadingLanguage
 
-# Copyright 2023 Giancarlo Dessi, Cagliari, IT
+# Copyright 2023-2025 Giancarlo Dessi, Cagliari, IT
 # All rights reserved.
 #
 # Redistribution and use of this script, with or without modification, is
@@ -25,7 +25,7 @@
 cd $(dirname $0) ; CWD=$(pwd)
 
 PRGNAM=OpenShadingLanguage
-VERSION=${VERSION:-1.12.14.0}
+VERSION=${VERSION:-1.13.12.0}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 PKGTYPE=${PKGTYPE:-tgz}
@@ -76,6 +76,8 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
+patch -p1 < $CWD/llvm-20.patch
+
 mkdir -p build
 cd build
   cmake \
@@ -99,6 +101,8 @@ mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
 mv $PKG/usr/share/doc/OSL/* $PKG/usr/doc/$PRGNAM-$VERSION
 rm -f $PKG/usr/doc/$PRGNAM-$VERSION/INSTALL.md
 rm -r $PKG/usr/share/doc
+rm -r $PKG/usr/cmake
+rm -r $PKG/usr/build-scripts
 cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
 
 mkdir -p $PKG/install
diff --git a/graphics/OpenShadingLanguage/OpenShadingLanguage.info b/graphics/OpenShadingLanguage/OpenShadingLanguage.info
index 45c7382837..ad85778743 100644
--- a/graphics/OpenShadingLanguage/OpenShadingLanguage.info
+++ b/graphics/OpenShadingLanguage/OpenShadingLanguage.info
@@ -1,10 +1,10 @@
 PRGNAM="OpenShadingLanguage"
-VERSION="1.12.14.0"
+VERSION="1.13.12.0"
 HOMEPAGE="https://github.com/AcademySoftwareFoundation/OpenShadingLanguage"
-DOWNLOAD="https://github.com/AcademySoftwareFoundation/OpenShadingLanguage/archive/v1.12.14.0/OpenShadingLanguage-1.12.14.0.tar.gz"
-MD5SUM="0948e423177f7279b5e231d58bf358aa"
-DOWNLOAD_x86_64=""
-MD5SUM_x86_64=""
+DOWNLOAD="UNSUPPORTED"
+MD5SUM=""
+DOWNLOAD_x86_64="https://github.com/AcademySoftwareFoundation/OpenShadingLanguage/archive/v1.13.12.0/OpenShadingLanguage-1.13.12.0.tar.gz"
+MD5SUM_x86_64="ac8cc5c448eea7da03022e5f2f7de530"
 REQUIRES="openimageio pugixml"
 MAINTAINER="Giancarlo Dessì"
 EMAIL="slack@giand.it"
diff --git a/graphics/OpenShadingLanguage/README b/graphics/OpenShadingLanguage/README
index a1d99c32fe..74de497390 100644
--- a/graphics/OpenShadingLanguage/README
+++ b/graphics/OpenShadingLanguage/README
@@ -12,8 +12,13 @@ the industry in many commercial and studio- proprietary renderers.
 
 Cuda and OptIx are optional dependencies but they are not tested.
 
-OSL is an optional dependency for Blender.
-
-Warning for Slackware current users: since the current's LLVM is
-updated to version 17, this version of OSL cannot be built on Slackware
-current because versions of LLVM greater than 15 are out of range.
+Warning
+OSL is an optional dependency for Blender autodetected. Unfortunately
+the build of Blender version available in this repository (3.3.10)
+with the support to OSL fails, perhaps because Slackware 15.0
+development packages could be outdated. In order to prevent compilation
+errors, the slackbuild of Blender will disable the support to OSL if
+this dependency is installed in your system, so you can install OSL
+without conflicts with the build of Blender.
+In Slackware current Blender 4.4.3 builds fine against OSL 1.14.6 and
+OpenImageIO 3.0.7.0.
diff --git a/graphics/OpenShadingLanguage/llvm-20.patch b/graphics/OpenShadingLanguage/llvm-20.patch
new file mode 100644
index 0000000000..6b2387dec8
--- /dev/null
+++ b/graphics/OpenShadingLanguage/llvm-20.patch
@@ -0,0 +1,37 @@
+--- ./src/cmake/externalpackages.cmake	2024-12-05 05:29:41.000000000 +0100
++++ ./src/cmake/fix-externalpackages.cmake	2025-06-29 21:05:17.517569272 +0200
+@@ -117,7 +117,7 @@
+ # LLVM library setup
+ checked_find_package (LLVM REQUIRED
+                       VERSION_MIN 9.0
+-                      VERSION_MAX 19.9
++                      VERSION_MAX 20.9
+                       PRINT LLVM_SYSTEM_LIBRARIES CLANG_LIBRARIES)
+ # ensure include directory is added (in case of non-standard locations
+ include_directories (BEFORE SYSTEM "${LLVM_INCLUDES}")
+
+--- ./src/include/OSL/platform.h	2024-12-05 05:29:41.000000000 +0100
++++ ./src/include/OSL/fix-platform.h	2025-06-29 21:08:25.389584349 +0200
+@@ -20,6 +20,7 @@
+ 
+ #include <cstring>
+ #include <memory>
++#include <cstdint>
+ 
+ #include <OSL/oslversion.h>
+ 
+
+--- ./src/liboslexec/llvm_util.cpp	2025-06-29 21:12:28.283603841 +0200
++++ ./src/liboslexec/fix-llvm_util.cpp	2025-06-29 21:12:47.262605365 +0200
+@@ -3204,7 +3204,11 @@
+ llvm::Type*
+ LLVM_Util::type_union(cspan<llvm::Type*> types)
+ {
++#if OSL_LLVM_VERSION >= 200
++    llvm::DataLayout target(module()->getDataLayout());
++#else
+     llvm::DataLayout target(module());
++#endif
+     size_t max_size  = 0;
+     size_t max_align = 1;
+     for (auto t : types) {