build-prerequisites-vs2017.cmd fails on alembic on Windows10

[Acidpix]

C:\Users\Brice\Desktop\USD\Pro\stage\prereq>cd alembic

C:\Users\Brice\Desktop\USD\Pro\stage\prereq\alembic>git pull
Already up to date.

C:\Users\Brice\Desktop\USD\Pro\stage\prereq\alembic>rem todo - have a command line switch to allow top of tree

C:\Users\Brice\Desktop\USD\Pro\stage\prereq\alembic>git checkout a3aa758
Note: checking out 'a3aa758'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

git checkout -b

HEAD is now at a3aa7585 Bumping to 1.6.1

C:\Users\Brice\Desktop\USD\Pro\stage\prereq\alembic>cd ..

C:\Users\Brice\Desktop\USD\Pro\stage\prereq>if not exist "build\alembic" mkdir build\alembic

C:\Users\Brice\Desktop\USD\Pro\stage\prereq>cd build\alembic

C:\Users\Brice\Desktop\USD\Pro\stage\prereq\build\alembic>cmake -G "Visual Studio 15 2017 Win64" -DCMAKE_PREFIX_PATH="C:\Users\Brice\Desktop\USD\Pro\stage\local" -DCMAKE_INSTALL_PREFIX="C:\Users\Brice\Desktop\USD\Pro\stage\local" -DUSE_PYILMBASE=1 -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY=alembic-stage -DBOOST_INCLUDEDIR="C:\Users\Brice\Desktop\USD\Pro\stage\local\include" -DBOOST_LIBRARYDIR="C:\Users\Brice\Desktop\USD\Pro\stage\local\lib" -DBoost_INCLUDE_DIR="C:\Users\Brice\Desktop\USD\Pro\stage\local\include" -DBoost_LIBRARY_DIR="C:\Users\Brice\Desktop\USD\Pro\stage\local\lib" -DUSE_HDF5=OFF -DUSE_TESTS=OFF -DUSE_EXAMPLES=OFF -DALEMBIC_PYILMBASE_PYIMATH_LIB="C:\Users\Brice\Desktop\USD\Pro\stage\local\lib\libPyImath.lib" -DILMBASE_ROOT="C:\Users\Brice\Desktop\USD\Pro\stage\local" -DALEMBIC_PYILMBASE_ROOT="C:\Users\Brice\Desktop\USD\Pro\stage\local" ../../alembic
-- Selecting Windows SDK version 10.0.14393.0 to target Windows 10.0.17134.
-- The C compiler identification is MSVC 19.10.25027.0
-- The CXX compiler identification is MSVC 19.10.25027.0
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.10.25017/bin/HostX86/x64/cl.exe
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.10.25017/bin/HostX86/x64/cl.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.10.25017/bin/HostX86/x64/cl.exe
-- Check for working CXX compiler: C:/Program Files (x86)/Microsoft Visual Studio/2017/Community/VC/Tools/MSVC/14.10.25017/bin/HostX86/x64/cl.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- CMAKE SYSTEM NAME: Windows
-- Performing Test COMPILER_SUPPORTS_CXX11
-- Performing Test COMPILER_SUPPORTS_CXX11 - Success
-- Performing Test COMPILER_SUPPORTS_CXX0X
-- Performing Test COMPILER_SUPPORTS_CXX0X - Failed
-- The install dir is C:/Users/Brice/Desktop/USD/Pro/stage/local
-- Looking for pthread.h
-- Looking for pthread.h - not found
-- Found Threads: TRUE
CMake Error at cmake/Modules/FindIlmBase.cmake:157 (MESSAGE):
ilmbase libraries (Half, Iex, IlmThread, Imath) not found, required
Call Stack (most recent call first):
cmake/AlembicIlmBase.cmake:36 (FIND_PACKAGE)
CMakeLists.txt:217 (INCLUDE)

-- Configuring incomplete, errors occurred!
See also "C:/Users/Brice/Desktop/USD/Pro/stage/prereq/build/alembic/CMakeFiles/CMakeOutput.log".
See also "C:/Users/Brice/Desktop/USD/Pro/stage/prereq/build/alembic/CMakeFiles/CMakeError.log".

C:\Users\Brice\Desktop\USD\Pro\stage\prereq\build\alembic>cmake --build . --target install --config Release -- /maxcpucount:8
Microsoft (R) Build Engine, version 15.1.550.39093
Copyright (C) Microsoft Corporation. Tous droits réservés.

MSBUILD : error MSB1009: Le fichier projet n'existe pas.
Commutateur : install.vcxproj

C:\Users\Brice\Desktop\USD\Pro\stage\prereq\build\alembic>cd C:\Users\Brice\Desktop\USD\Pro\stage
C:\Users\Brice\Desktop\USD\Pro\stage>

[meshula]

Thanks for the report, it seems OpenEXR has not installed properly as a prerequisite to Alembic.