diff --git a/0001-Generalize-lookup-of-stdosl.h-in-install-directory-a.patch b/0001-Generalize-lookup-of-stdosl.h-in-install-directory-a.patch
deleted file mode 100644
index a2171b6..0000000
--- a/0001-Generalize-lookup-of-stdosl.h-in-install-directory-a.patch
+++ /dev/null
@@ -1,147 +0,0 @@
-From b01c5510a1bc825a5bf90155ca926844fd679430 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Stefan=20Br=C3=BCns?= <stefan.bruens@rwth-aachen.de>
-Date: Sun, 13 Jan 2019 01:50:59 +0100
-Subject: [PATCH] Generalize lookup of stdosl.h in install directory, allow
- customization
-
-Currently, shaders are installed in <PREFIX>/shaders, which does not
-fit the needs of most Linux distributions, where <PREFIX> is typically
-/usr/, and architecture independent data like the shaders should be
-installed in e.g. /usr/share/OpenShadingLanguage/shaders/.
-
-Typically, CMAKE_INSTALL_DATADIR is used for this case, but this would
-break the current scheme. Introduce an OSL specific option instead,
-OSL_INSTALL_SHADERDIR (default ""), which can be used to specify an
-absolute or relative path for the shader installation.
-
-Usage (relative to CMAKE_INSTALL_PREFIX):
-$> cmake -DCMAKE_INSTALL_PREFIX=/usr/ \
-   -DOSL_INSTALL_SHADERDIR=share/OpenShadingLanguage
-
-Same effect, using absolute paths:
-$> cmake -DCMAKE_INSTALL_PREFIX=/usr/ \
-   -DOSL_INSTALL_SHADERDIR=/usr/share/OpenShadingLanguage
-
-The configured path is added to the stdosl.h path lookup, i.e. for
-the example above "/usr/share/OpenShadingLanguage/shaders/stdosl.h".
----
- CMakeLists.txt                          | 9 +++++++++
- src/liboslcomp/CMakeLists.txt           | 3 +++
- src/liboslcomp/oslcomp.cpp              | 9 +++++++++
- src/liboslcomp/oslcomp_shaders_dir.h.in | 7 +++++++
- src/liboslexec/CMakeLists.txt           | 1 +
- src/shaders/CMakeLists.txt              | 2 +-
- src/shaders/MaterialX/CMakeLists.txt    | 2 +-
- 7 files changed, 31 insertions(+), 2 deletions(-)
- create mode 100644 src/liboslcomp/oslcomp_shaders_dir.h.in
-
-diff --git a/CMakeLists.txt b/CMakeLists.txt
-index 3722d68..cb5320e 100644
---- a/CMakeLists.txt
-+++ b/CMakeLists.txt
-@@ -53,6 +53,15 @@ if (CMAKE_USE_FOLDERS)
-     set_property (GLOBAL PROPERTY USE_FOLDERS ON)
- endif ()
- 
-+option (OSL_INSTALL_SHADERDIR "Shader install directory, absolute or relative (to CMAKE_INSTALL_PREFIX)" "")
-+mark_as_advanced (OSL_INSTALL_SHADERDIR)
-+if (IS_ABSOLUTE ${OSL_INSTALL_SHADERDIR})
-+   set (INSTALL_FULL_SHADERDIR ${OSL_INSTALL_SHADERDIR})
-+else()
-+   set (INSTALL_FULL_SHADERDIR "${CMAKE_INSTALL_PREFIX}/${OSL_INSTALL_SHADERDIR}")
-+endif()
-+message (STATUS "Shader install dir  = ${INSTALL_FULL_SHADERDIR}")
-+
- include (GNUInstallDirs)
- 
- list (APPEND CMAKE_MODULE_PATH
-diff --git a/src/liboslcomp/CMakeLists.txt b/src/liboslcomp/CMakeLists.txt
-index 549aa54..a91a1b5 100644
---- a/src/liboslcomp/CMakeLists.txt
-+++ b/src/liboslcomp/CMakeLists.txt
-@@ -29,6 +29,9 @@ else ()
- 
- endif ()
- 
-+configure_file ( oslcomp_shaders_dir.h.in oslcomp_shaders_dir.h )
-+target_include_directories ( oslcomp PRIVATE "${CMAKE_BINARY_DIR}/src/liboslcomp" )
-+
- TARGET_LINK_LIBRARIES ( oslcomp ${OPENIMAGEIO_LIBRARIES} ${ILMBASE_LIBRARIES}
-                        ${Boost_LIBRARIES} ${CMAKE_DL_LIBS}
-                        ${CLANG_LIBRARIES} ${LLVM_LIBRARIES} ${LLVM_LDFLAGS}
-diff --git a/src/liboslcomp/oslcomp.cpp b/src/liboslcomp/oslcomp.cpp
-index 76145dd..db1ec06 100644
---- a/src/liboslcomp/oslcomp.cpp
-+++ b/src/liboslcomp/oslcomp.cpp
-@@ -36,6 +36,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- #include <cerrno>
- 
- #include "oslcomp_pvt.h"
-+#include "oslcomp_shaders_dir.h"
- 
- #include <OpenImageIO/platform.h>
- #include <OpenImageIO/sysutil.h>
-@@ -485,6 +486,14 @@ find_stdoslpath (const std::vector<std::string>& includepaths)
-         }
-     }
- 
-+    // Try the regular install directory
-+    std::string install_path = OSL_SHADERS_INSTALL_DIR;
-+    if (OIIO::Filesystem::is_directory (install_path)) {
-+        install_path = install_path + "/stdosl.h";
-+        if (OIIO::Filesystem::exists (install_path))
-+            return ustring(install_path);
-+    }
-+
-     // Try looking for "oslc" binary in the $PATH, and if so, look in
-     // ../../shaders/stdosl.h
-     std::vector<std::string> exec_path_dirs;
-diff --git a/src/liboslcomp/oslcomp_shaders_dir.h.in b/src/liboslcomp/oslcomp_shaders_dir.h.in
-new file mode 100644
-index 0000000..0638252
---- /dev/null
-+++ b/src/liboslcomp/oslcomp_shaders_dir.h.in
-@@ -0,0 +1,7 @@
-+#ifndef OSL_SHADERS_INSTALL_DIR
-+
-+// Keep this in sync with the DESTINATION in shaders/CMakeLists.txt
-+// and shaders/MaterialX/CMakeLists.txt
-+#define OSL_SHADERS_INSTALL_DIR "@INSTALL_FULL_SHADERDIR@/shaders/"
-+
-+#endif // OSL_SHADERS_INSTALL_DIR
-diff --git a/src/liboslexec/CMakeLists.txt b/src/liboslexec/CMakeLists.txt
-index 9f39444..fce411b 100644
---- a/src/liboslexec/CMakeLists.txt
-+++ b/src/liboslexec/CMakeLists.txt
-@@ -41,6 +41,7 @@ if (NOT BUILDSTATIC)
- endif ()
- 
- include_directories ( "${CMAKE_SOURCE_DIR}/src/liboslcomp" )
-+include_directories ( "${CMAKE_BINARY_DIR}/src/liboslcomp" )
- 
- FILE ( GLOB exec_headers "*.h" )
- FILE ( GLOB compiler_headers "../liboslcomp/*.h" )
-diff --git a/src/shaders/CMakeLists.txt b/src/shaders/CMakeLists.txt
-index 9b263ff..594c09c 100644
---- a/src/shaders/CMakeLists.txt
-+++ b/src/shaders/CMakeLists.txt
-@@ -63,4 +63,4 @@ add_custom_target (shaders ALL
-                    SOURCES ${shader_source} ${shader_headers})
- 
- install (FILES ${shader_headers} ${shader_source} ${shader_objs}
--        DESTINATION shaders)
-+        DESTINATION ${INSTALL_FULL_SHADERDIR}/shaders)
-diff --git a/src/shaders/MaterialX/CMakeLists.txt b/src/shaders/MaterialX/CMakeLists.txt
-index 88b52f3..42384da 100644
---- a/src/shaders/MaterialX/CMakeLists.txt
-+++ b/src/shaders/MaterialX/CMakeLists.txt
-@@ -258,5 +258,5 @@ add_custom_target (mxshaders ALL
-                    SOURCES ${shader_source} ${mx_shader_headers})
- 
- install (FILES ${mx_shader_headers} ${mx_shader_objs} ${mx_shader_osls}
--         DESTINATION shaders/MaterialX)
-+         DESTINATION ${INSTALL_FULL_SHADERDIR}/shaders/MaterialX)
- 
--- 
-2.24.0
-
diff --git a/0001-LLVM-10-odds-and-ends-1135.patch b/0001-LLVM-10-odds-and-ends-1135.patch
new file mode 100644
index 0000000..d307bd0
--- /dev/null
+++ b/0001-LLVM-10-odds-and-ends-1135.patch
@@ -0,0 +1,94 @@
+From 2683cfdc41e66f7681c68a6f1b85e0a26fb00a86 Mon Sep 17 00:00:00 2001
+From: Larry Gritz <lg@larrygritz.com>
+Date: Tue, 31 Mar 2020 08:21:01 -0700
+Subject: [PATCH] LLVM 10 odds and ends (#1135)
+
+* Use llvm 10 in some CI tests
+
+* build_llvm: New download location for llvm 10
+
+* Build time check that LLVM 10+ requires C++ >= 14
+---
+ .github/workflows/workflow.yml    | 22 ++++++++++++++++++++--
+ src/build-scripts/build_llvm.bash |  7 ++++++-
+ src/cmake/externalpackages.cmake  |  5 ++++-
+ 3 files changed, 30 insertions(+), 4 deletions(-)
+
+diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
+index b331fca9..4ef8a2ee 100644
+--- a/.github/workflows/workflow.yml
++++ b/.github/workflows/workflow.yml
+@@ -111,8 +111,26 @@ jobs:
+             source src/build-scripts/gh-installdeps.bash
+             source src/build-scripts/ci-build-and-test.bash
+ 
++  linux-2021ish-gcc8-llvm9:
++    name: "Linux gcc8, C++17, llvm10, oiio master, avx2, exr2.4"
++    runs-on: ubuntu-18.04
++    steps:
++      - uses: actions/checkout@v1
++      - name: all
++        env:
++          CXX: g++-8
++          CMAKE_CXX_STANDARD: 17
++          LLVM_VERSION: 10.0.0
++          USE_SIMD: avx2,f16c
++          OPENEXR_VERSION: 2.4.0
++          OPENIMAGEIO_BRANCH: master
++        run: |
++            source src/build-scripts/ci-startup.bash
++            source src/build-scripts/gh-installdeps.bash
++            source src/build-scripts/ci-build-and-test.bash
++
+   linux-bleeding:
+-    name: "Linux bleeding edge: gcc8, C++17, llvm9, oiio master, avx2, exr2.4"
++    name: "Linux bleeding edge: gcc8, C++17, llvm10, oiio master, avx2, exr2.4"
+     runs-on: ubuntu-18.04
+     steps:
+       - uses: actions/checkout@v1
+@@ -121,7 +139,7 @@ jobs:
+           CXX: g++-8
+           USE_CPP: 17
+           CMAKE_CXX_STANDARD: 17
+-          LLVM_VERSION: 9.0.0
++          LLVM_VERSION: 10.0.0
+           USE_SIMD: avx2,f16c
+           OPENEXR_VERSION: 2.4.0
+           OPENIMAGEIO_BRANCH: master
+diff --git a/src/build-scripts/build_llvm.bash b/src/build-scripts/build_llvm.bash
+index b0fdf591..3b25b64e 100755
+--- a/src/build-scripts/build_llvm.bash
++++ b/src/build-scripts/build_llvm.bash
+@@ -24,7 +24,12 @@ if [[ `uname` == "Linux" ]] ; then
+         LLVMTAR=clang+llvm-${LLVM_VERSION}-x86_64-linux-gnu-${LLVM_DISTRO_NAME}.tar.xz
+     fi
+     echo LLVMTAR = $LLVMTAR
+-    curl --location http://releases.llvm.org/${LLVM_VERSION}/${LLVMTAR} -o $LLVMTAR
++    if [ "$LLVM_VERSION" == "10.0.0" ] ; then
++        # new
++        curl --location https://github.com/llvm/llvm-project/releases/download/llvmorg-${LLVM_VERSION}/${LLVMTAR} -o $LLVMTAR
++    else
++        curl --location http://releases.llvm.org/${LLVM_VERSION}/${LLVMTAR} -o $LLVMTAR
++    fi
+     ls -l $LLVMTAR
+     tar xf $LLVMTAR
+     rm -f $LLVMTAR
+diff --git a/src/cmake/externalpackages.cmake b/src/cmake/externalpackages.cmake
+index 5afb9664..62f9b7fd 100644
+--- a/src/cmake/externalpackages.cmake
++++ b/src/cmake/externalpackages.cmake
+@@ -223,7 +223,10 @@ add_definitions (-DOSL_LLVM_FULL_VERSION="${LLVM_VERSION}")
+ if (LLVM_NAMESPACE)
+     add_definitions ("-DLLVM_NAMESPACE=${LLVM_NAMESPACE}")
+ endif ()
+-
++if (LLVM_VERSION VERSION_GREATER_EQUAL 10.0.0 AND
++    CMAKE_CXX_STANDARD VERSION_LESS 14)
++    message (FATAL_ERROR "LLVM 10+ requires C++14 or higher.")
++endif ()
+ 
+ checked_find_package (partio)
+ 
+-- 
+2.16.4
+
diff --git a/0001-Some-SPI-build-fixes-for-finding-the-right-llvm.patch b/0001-Some-SPI-build-fixes-for-finding-the-right-llvm.patch
new file mode 100644
index 0000000..06bb1dc
--- /dev/null
+++ b/0001-Some-SPI-build-fixes-for-finding-the-right-llvm.patch
@@ -0,0 +1,133 @@
+From ca90dc60c0f6473ff99fa0b396af4d434862bc1b Mon Sep 17 00:00:00 2001
+From: Larry Gritz <lg@larrygritz.com>
+Date: Mon, 30 Mar 2020 21:05:24 -0700
+Subject: [PATCH] Some SPI build fixes for finding the right llvm
+
+---
+ site/spi/Makefile-bits | 63 ++++++++++++++++++++++++++++++++------------------
+ 1 file changed, 41 insertions(+), 22 deletions(-)
+
+diff --git a/site/spi/Makefile-bits b/site/spi/Makefile-bits
+index 4b148191..15eeca0e 100644
+--- a/site/spi/Makefile-bits
++++ b/site/spi/Makefile-bits
+@@ -66,11 +66,13 @@ endif
+ ifeq (${SP_OS}, rhel7)
+     # Rhel7 (current)
+     platform := rhel7
+-    SPI_COMPILER_PLATFORM ?= gcc-4.8
+-    ifeq (${SPI_COMPILER_PLATFORM},gcc-6.3)
+-        SPCOMP2_COMPILER ?= gcc63
+-    else
++    SPI_COMPILER_PLATFORM ?= gcc-6.3
++    ifeq (${SPI_COMPILER_PLATFORM},gcc-4.8)
+         SPCOMP2_COMPILER ?= gcc48m64
++        CMAKE_CXX_STANDARD ?= 11
++    else
++        SPCOMP2_COMPILER ?= gcc63
++        CMAKE_CXX_STANDARD ?= 14
+     endif
+     SP_PLATFORM ?= linux
+     SP_PROC ?= x86_64
+@@ -100,7 +102,6 @@ SPCOMP2_ROOT ?= /shots/spi/home/lib/SpComp2
+ 
+ ## Rhel7 (current)
+ ifeq (${SP_OS}, rhel7)
+-    CMAKE_CXX_STANDARD ?= 11
+     USE_SIMD ?= sse4.1,aes
+     CMAKE ?= cmake
+     USE_NINJA ?= 1
+@@ -128,23 +129,22 @@ ifeq (${SP_OS}, rhel7)
+     LLVM_DIRECTORY ?= /shots/spi/home/lib/arnold/rhel7/llvm_8.0.0
+     ifeq (${COMPILER},clang6)
+ 	    LLVM_DIRECTORY := /shots/spi/home/lib/arnold/rhel7/llvm_6.0.1
+-        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=${LLVM_DIRECTORY}/bin/clang -DCMAKE_CXX_COMPILER=${LLVM_DIRECTORY}/bin/clang++
+-        MY_CMAKE_FLAGS += -DCMAKE_C_FLAGS="--gcc-toolchain=/usr" -DCMAKE_CXX_FLAGS="--gcc-toolchain=/usr"
++        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=${LLVM_DIRECTORY}/bin/clang \
++                          -DCMAKE_CXX_COMPILER=${LLVM_DIRECTORY}/bin/clang++
+     else ifeq (${COMPILER},clang7)
+         LLVM_DIRECTORY := /shots/spi/home/lib/arnold/rhel7/llvm_7.0.1
+-        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=${LLVM_DIRECTORY}/bin/clang -DCMAKE_CXX_COMPILER=${LLVM_DIRECTORY}/bin/clang++
+-        MY_CMAKE_FLAGS += -DCMAKE_C_FLAGS="--gcc-toolchain=/usr" -DCMAKE_CXX_FLAGS="--gcc-toolchain=/usr"
++        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=${LLVM_DIRECTORY}/bin/clang \
++                          -DCMAKE_CXX_COMPILER=${LLVM_DIRECTORY}/bin/clang++
+     else ifeq (${COMPILER},clang8)
+         LLVM_DIRECTORY := /shots/spi/home/lib/arnold/rhel7/llvm_8.0.0
+-        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=${LLVM_DIRECTORY}/bin/clang -DCMAKE_CXX_COMPILER=${LLVM_DIRECTORY}/bin/clang++
+-        MY_CMAKE_FLAGS += -DCMAKE_C_FLAGS="--gcc-toolchain=/usr" -DCMAKE_CXX_FLAGS="--gcc-toolchain=/usr"
++        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=${LLVM_DIRECTORY}/bin/clang \
++                          -DCMAKE_CXX_COMPILER=${LLVM_DIRECTORY}/bin/clang++
+     else ifeq (${COMPILER},clang9)
+-        LLVM_DIRECTORY := /shots/spi/home/software/packages/llvm/9.0.0/${SPI_COMPILER_PLATFORM}
+-        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=${LLVM_DIRECTORY}/bin/clang -DCMAKE_CXX_COMPILER=${LLVM_DIRECTORY}/bin/clang++
+-        MY_CMAKE_FLAGS += -DCMAKE_C_FLAGS="--gcc-toolchain=/usr" -DCMAKE_CXX_FLAGS="--gcc-toolchain=/usr"
++        LLVM_DIRECTORY := /shots/spi/home/software/packages/llvm/9.0.1-1/${SPI_COMPILER_PLATFORM}
++        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=${LLVM_DIRECTORY}/bin/clang \
++                          -DCMAKE_CXX_COMPILER=${LLVM_DIRECTORY}/bin/clang++
+     else ifeq (${COMPILER},clang)
+         MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
+-        MY_CMAKE_FLAGS += -DCMAKE_C_FLAGS="--gcc-toolchain=/usr" -DCMAKE_CXX_FLAGS="--gcc-toolchain=/usr"
+     else ifeq (${COMPILER}, gcc6)
+         MY_CMAKE_FLAGS += \
+            -DCMAKE_C_COMPILER=/opt/rh/devtoolset-6/root/usr/bin/gcc \
+@@ -156,9 +156,11 @@ ifeq (${SP_OS}, rhel7)
+         MY_CMAKE_FLAGS += \
+            -DCMAKE_C_COMPILER=${LLVM_DIRECTORY}/bin/clang \
+            -DCMAKE_CXX_COMPILER=${LLVM_DIRECTORY}/bin/clang++
+-        MY_CMAKE_FLAGS += -DCMAKE_C_FLAGS="--gcc-toolchain=/usr" \
+-                          -DCMAKE_CXX_FLAGS="--gcc-toolchain=/usr" \
+-			  -DTOOLCHAIN_FLAGS="--gcc-toolchain=/usr"
++    endif
++    ifeq (${SPI_COMPILER_PLATFORM},gcc-4.8)
++            MY_CMAKE_FLAGS += -DCMAKE_C_FLAGS="--gcc-toolchain=/usr" \
++                              -DCMAKE_CXX_FLAGS="--gcc-toolchain=/usr" \
++                              -DTOOLCHAIN_FLAGS="--gcc-toolchain=/usr"
+     endif
+ 
+     MY_CMAKE_FLAGS +=
+@@ -292,6 +294,7 @@ ifeq (${SP_OS}, rhel7)
+ 
+ ## Generic OSX machines (including LG's laptop)
+ else ifeq (${platform}, macosx)
++    CMAKE_CXX_STANDARD ?= 14
+     USE_SIMD ?= sse4.2
+     MY_CMAKE_FLAGS += -DCMAKE_BUILD_WITH_INSTALL_RPATH=1
+     MY_CMAKE_FLAGS += -DCMAKE_INSTALL_NAME_DIR="${working_dir}/dist/${platform}${variant}/lib"
+@@ -317,14 +320,30 @@ else ifeq (${platform}, macosx)
+         MY_CMAKE_FLAGS += \
+            -DCMAKE_C_COMPILER=gcc-8 -DCMAKE_CXX_COMPILER=g++-8
+         USE_LIBCPLUSPLUS := 0
++    else ifeq (${COMPILER}, gcc9)
++        MY_CMAKE_FLAGS += \
++           -DCMAKE_C_COMPILER=gcc-9 -DCMAKE_CXX_COMPILER=g++-9
++        USE_LIBCPLUSPLUS := 0
+     else ifeq (${COMPILER},clang6)
+-        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=/usr/local/Cellar/llvm@6/6.0.1_1/bin/clang -DCMAKE_CXX_COMPILER=/usr/local/Cellar/llvm@6/6.0.1_1/bin/clang++
++        MY_CMAKE_FLAGS += \
++            -DCMAKE_C_COMPILER=/usr/local/Cellar/llvm@6/6.0.1_2/bin/clang \
++            -DCMAKE_CXX_COMPILER=/usr/local/Cellar/llvm@6/6.0.1_2/bin/clang++
+     else ifeq (${COMPILER},clang7)
+-        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=/usr/local/Cellar/llvm@7/7.0.1/bin/clang -DCMAKE_CXX_COMPILER=/usr/local/Cellar/llvm@7/7.0.1/bin/clang++
++        MY_CMAKE_FLAGS += \
++            -DCMAKE_C_COMPILER=/usr/local/Cellar/llvm@7/7.0.1_1/bin/clang \
++            -DCMAKE_CXX_COMPILER=/usr/local/Cellar/llvm@7/7.0.1_1/bin/clang++
+     else ifeq (${COMPILER},clang8)
+-        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=/usr/local/Cellar/llvm/8.0.1/bin/clang -DCMAKE_CXX_COMPILER=/usr/local/Cellar/llvm/8.0.1/bin/clang++
++        MY_CMAKE_FLAGS += \
++            -DCMAKE_C_COMPILER=/usr/local/Cellar/llvm@8/8.0.1_1/bin/clang \
++            -DCMAKE_CXX_COMPILER=/usr/local/Cellar/llvm/8.0.1/bin/clang++
+     else ifeq (${COMPILER},clang9)
+-        MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=/usr/local/Cellar/llvm/9.0.0/bin/clang -DCMAKE_CXX_COMPILER=/usr/local/Cellar/llvm/9.0.0/bin/clang++
++        MY_CMAKE_FLAGS += \
++            -DCMAKE_C_COMPILER=/usr/local/Cellar/llvm@9/9.0.1/bin/clang \
++            -DCMAKE_CXX_COMPILER=/usr/local/Cellar/llvm@9/9.0.1/bin/clang++
++    else ifeq (${COMPILER},clang10)
++        MY_CMAKE_FLAGS += \
++            -DCMAKE_C_COMPILER=/usr/local/Cellar/llvm/10.0.0/bin/clang \
++            -DCMAKE_CXX_COMPILER=/usr/local/Cellar/llvm/10.0.0/bin/clang++
+     else ifeq (${COMPILER},clang)
+         MY_CMAKE_FLAGS += -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++
+     else ifeq (${COMPILER},gcc)
+-- 
+2.16.4
+
diff --git a/OpenShadingLanguage-Release-1.10.7.tar.gz b/OpenShadingLanguage-Release-1.10.7.tar.gz
deleted file mode 100644
index db7015d..0000000
--- a/OpenShadingLanguage-Release-1.10.7.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:0c4cce505e2803baa55db11744adb72fad854c2a4cc4f02592f79324ac5bfda1
-size 13542717
diff --git a/OpenShadingLanguage-Release-1.11.4.1.tar.gz b/OpenShadingLanguage-Release-1.11.4.1.tar.gz
new file mode 100644
index 0000000..8b2e6c1
--- /dev/null
+++ b/OpenShadingLanguage-Release-1.11.4.1.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8d8f2a1544f537f5ff3fc033195e023546c51dadd700849ed5aaaf0cf5fb24dd
+size 15083497
diff --git a/OpenShadingLanguage.changes b/OpenShadingLanguage.changes
index 5bd5644..7592d9d 100644
--- a/OpenShadingLanguage.changes
+++ b/OpenShadingLanguage.changes
@@ -1,3 +1,20 @@
+-------------------------------------------------------------------
+Tue Apr 21 09:54:50 UTC 2020 - Dave Plater <davejplater@gmail.com>
+
+- Update to v1.11.4.1 to fix build with LLVM10.
+- Remove incorporated patch:
+  0001-Generalize-lookup-of-stdosl.h-in-install-directory-a.patch
+- Added patches from git:
+  0001-Some-SPI-build-fixes-for-finding-the-right-llvm.patch and
+  0001-LLVM-10-odds-and-ends-1135.patch.
+- Created osl-pkgconfig-versions.patch to fix pc file's version
+  fields. Upstreamed along with workaround for new libclang-cpp in
+  issue #1155
+- Created osl-oslimageio-soname.patch to keep the library build in
+  line with v1.x.
+- For many upstream changes since v1.10.7 see:
+  /usr/share/doc/packages/OpenShadingLanguage/CHANGES.md
+
 -------------------------------------------------------------------
 Wed Nov  6 15:45:59 UTC 2019 - Stefan Brüns <stefan.bruens@rwth-aachen.de>
 
diff --git a/OpenShadingLanguage.spec b/OpenShadingLanguage.spec
index c24c69e..ebf6ee5 100644
--- a/OpenShadingLanguage.spec
+++ b/OpenShadingLanguage.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package OpenShadingLanguage
 #
-# Copyright (c) 2019 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2020 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -19,32 +19,36 @@
 # The library soname versions follow the package version major and minor numbers.
 %define sover %(echo %{version} | cut -d . -f 1,2)
 %define sufx %(echo %{sover}|tr . _)
+# LLVM version is needed because -lclang-cpp doesn't exist < 10
+%define llvm_version %(llvm-config --version | cut -d . -f 1)
 
 Name:           OpenShadingLanguage
-Version:        1.10.7
+Version:        1.11.4.1
 Release:        0
 Summary:        A language for programmable shading
 License:        BSD-3-Clause
 Group:          Productivity/Graphics/Other
 Url:            https://github.com/imageworks/OpenShadingLanguage
-Source0:        https://github.com/imageworks/OpenShadingLanguage/archive/Release-%{version}.tar.gz#/%{name}-Release-%{version}.tar.gz
+Source0:        https://github.com/imageworks/OpenShadingLanguage/archive/Release-%{version}-dev.tar.gz#/%{name}-Release-%{version}.tar.gz
 Source1:        https://creativecommons.org/licenses/by/3.0/legalcode.txt
-#PATCH-FIX-UPSTREAM 0001-Generalize-lookup-of-stdosl.h-in-install-directory-a.patch
-#https://github.com/imageworks/OpenShadingLanguage/issues/955
-Patch0:         0001-Generalize-lookup-of-stdosl.h-in-install-directory-a.patch
+Patch0:         0001-LLVM-10-odds-and-ends-1135.patch
+Patch1:         0001-Some-SPI-build-fixes-for-finding-the-right-llvm.patch
+Patch2:         osl-pkgconfig-versions.patch
+Patch3:         osl-oslimageio-soname.patch
+BuildRequires:  OpenEXR-devel
+BuildRequires:  OpenImageIO-devel >= 2.0
 BuildRequires:  bison
-BuildRequires:  cmake
-BuildRequires:  cmake(pugixml)
 BuildRequires:  clang-devel >= 4
+BuildRequires:  cmake
 BuildRequires:  flex
 BuildRequires:  gcc-c++
 BuildRequires:  libboost_filesystem-devel
 BuildRequires:  libboost_system-devel
 BuildRequires:  libboost_thread-devel
 BuildRequires:  libboost_wave-devel
-BuildRequires:  OpenEXR-devel
-BuildRequires:  OpenImageIO-devel >= 1.8
+BuildRequires:  pkg-config
 BuildRequires:  python
+BuildRequires:  cmake(pugixml)
 Requires:       %{name}-common-headers = %{version}
 Recommends:     %{name}-doc = %{version}
 
@@ -187,14 +191,20 @@ The %{name}-devel package contains libraries and header files for
 developing applications that use %{name}.
 
 %prep
-%setup -q -n %{name}-Release-%{version}
-%patch0 -p1
+%setup -q -n %{name}-Release-%{version}-dev
+%autopatch -p1
+echo "Using LLVM%{llvm_version}"
 
 %build
 %cmake \
       -DCMAKE_INSTALL_DOCDIR:PATH=%{_docdir}/%{name} \
-      -DOSL_INSTALL_SHADERDIR:PATH=%{_datadir}/%{name}
-
+      -DOSL_INSTALL_SHADERDIR:PATH=%{_datadir}/%{name} \
+      -DCMAKE_CXX_STANDARD:STRING=14
+%if 0%{?llvm_version} >= 10
+# Add missing -lclang-cpp to linker scripts for liboslcomp and liboslexec
+sed -i 's/\-ldl /\-ldl \-lclang-cpp /' src/liboslexec/CMakeFiles/oslexec.dir/link.txt
+sed -i 's/\-ldl /\-ldl \-lclang-cpp /' src/liboslcomp/CMakeFiles/oslcomp.dir/link.txt
+%endif
 make %{?_smp_mflags}
 
 %install
@@ -203,6 +213,8 @@ make %{?_smp_mflags}
 cp -v %{SOURCE1} .
 
 find %{buildroot} -name LICENSE -print -delete
+find %{buildroot} -name README.md -print -delete
+find %{buildroot} -name CHANGES.md -print -delete
 find %{buildroot} -type f -name "*.la" -delete -print
 
 %post -n liboslcomp%{sufx} -p /sbin/ldconfig
@@ -224,6 +236,7 @@ find %{buildroot} -type f -name "*.la" -delete -print
 %postun -n osl.imageio%{sufx} -p /sbin/ldconfig
 
 %files
+%license LICENSE
 %{_bindir}/*
 
 %files doc
@@ -231,16 +244,16 @@ find %{buildroot} -type f -name "*.la" -delete -print
 %doc %{_docdir}/%{name}/
 
 %files MaterialX-shaders-source
-%_datadir/%{name}/shaders/MaterialX
+%{_datadir}/OSL/shaders/MaterialX
 
 %files example-shaders-source
-%_datadir/%{name}/shaders/*.osl
-%_datadir/%{name}/shaders/*.oso
+%{_datadir}/OSL/shaders/*.osl
+%{_datadir}/OSL/shaders/*.oso
 
 %files common-headers
-%dir %_datadir/%{name}
-%dir %_datadir/%{name}/shaders
-%_datadir/%{name}/shaders/*.h
+%dir %{_datadir}/OSL
+%dir %{_datadir}/OSL/shaders
+%{_datadir}/OSL/shaders/*.h
 
 %files -n liboslcomp%{sufx}
 %license LICENSE
@@ -270,5 +283,7 @@ find %{buildroot} -type f -name "*.la" -delete -print
 %license LICENSE
 %{_includedir}/*
 %{_libdir}/*.so
+%{_libdir}/cmake/
+%{_libdir}/pkgconfig/
 
 %changelog
diff --git a/osl-oslimageio-soname.patch b/osl-oslimageio-soname.patch
new file mode 100644
index 0000000..def3eb6
--- /dev/null
+++ b/osl-oslimageio-soname.patch
@@ -0,0 +1,33 @@
+From: Dave Plater <davejplater@gmail.com>
+Date: Fri 24 Apr 08:52:18 SAST 2020
+Subject: input: reenable shared library build osl.imageio.so
+Upstream: submitted
+
+The build mistakes version 1.11 for > 2.1 and builds osl.imageio.so as
+a plugin. This would mean relocating it to a plugin directory.Index: b/src/osl.imageio/CMakeLists.txt
+===================================================================
+--- a/src/osl.imageio/CMakeLists.txt	2020-03-24 07:33:42.000000000 +0200
++++ b/src/osl.imageio/CMakeLists.txt	2020-04-22 09:31:43.152642764 +0200
+@@ -28,20 +28,16 @@ macro (add_oiio_plugin)
+ 
+     # Get the name of the current directory and use it as the target name.
+     get_filename_component (_plugin_name ${CMAKE_CURRENT_SOURCE_DIR} NAME)
+-    if (OPENIMAGEIO_VERSION VERSION_LESS 2.1)
+         # Prior to OIIO 2.1, OIIO built plugin modules as shared libs rather
+         # than "modules". On OSX, that changed its extension from ".dylib"
+         # to ".so". If building against OIIO < 2.1, do it the old way.
+         # This clause can disappear when OIIO 2.1 is the minimum that OSL
+         # supports.
+-        add_library (${_plugin_name} SHARED ${_plugin_UNPARSED_ARGUMENTS})
+-        set_target_properties (${_plugin_name}
++    add_library (${_plugin_name} SHARED ${_plugin_UNPARSED_ARGUMENTS})
++    set_target_properties (${_plugin_name}
+                                PROPERTIES
+                                VERSION ${OSL_VERSION_MAJOR}.${OSL_VERSION_MINOR}.${OSL_VERSION_PATCH}
+                                SOVERSION ${SOVERSION} )
+-    else ()
+-        add_library (${_plugin_name} MODULE ${_plugin_UNPARSED_ARGUMENTS})
+-    endif ()
+ 
+     target_compile_definitions (${_plugin_name} PRIVATE
+                                 ${_plugin_DEFINITIONS})
diff --git a/osl-pkgconfig-versions.patch b/osl-pkgconfig-versions.patch
new file mode 100644
index 0000000..7036a31
--- /dev/null
+++ b/osl-pkgconfig-versions.patch
@@ -0,0 +1,22 @@
+From: Dave Plater <davejplater@gmail.com>
+Date: Tue 21 Apr 10:49:01 SAST 2020
+Subject: input: Fix version field in pc files
+Upstream: submitted
+
+CMakeLists.txt fails to provide Version:
+@PACKAGE_VERSION_MAJOR@.@PACKAGE_VERSION_MINOR@.@PACKAGE_VERSION_PATCH@
+for pc files resulting in a Version: field of ..
+This patch adds the above variables.diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 9877af9a..4b84c7a9 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -50,6 +50,9 @@ set (OSO_FILE_VERSION_MINOR 0)
+ # This needs to be early, for CMAKE_INSTALL_FULL_DATADIR
+ include (GNUInstallDirs)
+ 
++set (PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
++set (PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
++set (PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
+ 
+ option (VERBOSE "Print lots of messages while compiling" OFF)
+ set (${PROJ_NAME}_NAMESPACE ${PROJECT_NAME} CACHE STRING