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Building with CMake Presets

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# Building HDF5 with CMake

Problem
  You want to build HDF5 with CMake, but there are so many options to consider.

Solution
  CMake introduced presets in version 3.19. HDF Group provides a CMakePresets.json, requiring CMake 3.26, that will build HDF5 with the options for building a typical shared library with the common languages for a platform. The features include building the tools, examples, plugins, and the shared and static libraries.

Discussion
  The CMakePresets.json file is located in the root directory of the HDF5 source. It is from here you will execute the cmake command to build HDF5. The following example shows how to build HDF5 with the CMakePresets.json file:
  - change directory to the hdf5 source folder
  - execute `cmake –workflow –preset ci-StdShar-<compiler-type> –fresh`
    where "<compiler-type>" is GNUC or MSVC or Clang
  The above example will create a "build" folder in the source parent directory, which will contain the results of the build, including installation package files.

The CMakePresets.json files created by HDF Group are intended to be used with the Ninja build system, which may need to be installed separately on some platforms.

See Also
  See CMake documentation for details on presets:
  - https://cmake.org/cmake/help/latest/manual/cmake-presets.7.html

## CMake Presets Use Case: Static Library and Tools

Problem
  I want to build the HDF5 library statically and include the tools.

Solution
  Static libraries can be built with zlib and libaec - but cannot be built with plugins. Java JNI bindings require shared libraries.

Create a CMakeUserPresets.json file with the following content:

{
"version": 6,
"cmakeMinimumRequired": {
"major": 3,
"minor": 25,
"patch": 0
},
"configurePresets": [
{
"name": "my-Static-Tools",
"hidden": true,
"description": "Build HDF5 with static library and tools",
"inherits": ["ci-base", "ci-CompressionVars", "ci-StdExamples"],
"cacheVariables": {
"HDF_PACKAGE_NAMESPACE": {"type": "STRING", "value": "hdf5::"},
"HDF5_BUILD_SHARED_LIBS": "OFF",
"HDF5_BUILD_TOOLS": "ON",
"HDF5_ENABLE_ZLIB_SUPPORT": "ON",
"HDF5_ENABLE_LIBAEC": "ON",
"HDF5_ENABLE_PLUGIN_SUPPORT": "OFF"
}
},
{
"name": "my-Static-Tools-MSVC",
"description": "MSVC Standard Config for x64 (Release)",
"inherits": [
"ci-x64-Release-MSVC",
"ci-CPP",
"my-Static-Tools"
]
},
{
"name": "my-Static-Tools-Clang",
"description": "Clang Standard Config for x64 (Release)",
"inherits": [
"ci-x64-Release-Clang",
"ci-CPP",
"ci-Fortran",
"my-Static-Tools"
]
},
{
"name": "my-Static-Tools-GNUC",
"description": "GNUC Standard Config for x64 (Release)",
"inherits": [
"ci-x64-Release-GNUC",
"ci-CPP",
"ci-Fortran",
"my-Static-Tools"
]
},
{
"name": "my-Static-Tools-macos-GNUC",
"description": "GNUC Standard Config for macos (Release)",
"inherits": [
"ci-macos-Release-GNUC",
"ci-CPP",
"my-Static-Tools"
]
}
],
"buildPresets": [
{
"name": "my-Static-Tools-MSVC",
"description": "MSVC Standard Build for x64 (Release)",
"configurePreset": "my-Static-Tools-MSVC",
"inherits": [
"ci-x64-Release-MSVC"
]
},
{
"name": "my-Static-Tools-Clang",
"description": "Clang Standard Build for x64 (Release)",
"configurePreset": "my-Static-Tools-Clang",
"inherits": [
"ci-x64-Release-Clang"
]
},
{
"name": "my-Static-Tools-GNUC",
"description": "GNUC Standard Build for x64 (Release)",
"configurePreset": "my-Static-Tools-GNUC",
"inherits": [
"ci-x64-Release-GNUC"
]
},
{
"name": "my-Static-Tools-macos-GNUC",
"description": "GNUC Standard Build for macos (Release)",
"configurePreset": "my-Static-Tools-macos-GNUC",
"verbose": true,
"inherits": [
"ci-macos-Release-GNUC"
]
}
],
"testPresets": [
{
"name": "my-Static-Tools-MSVC",
"configurePreset": "my-Static-Tools-MSVC",
"inherits": [
"ci-x64-Release-MSVC"
]
},
{
"name": "my-Static-Tools-Clang",
"configurePreset": "my-Static-Tools-Clang",
"inherits": [
"ci-x64-Release-Clang"
]
},
{
"name": "my-Static-Tools-GNUC",
"configurePreset": "my-Static-Tools-GNUC",
"inherits": [
"ci-x64-Release-GNUC"
]
},
{
"name": "my-Static-Tools-macos-GNUC",
"configurePreset": "my-Static-Tools-macos-GNUC",
"inherits": [
"ci-macos-Release-GNUC"
]
}
],
"packagePresets": [
{
"name": "my-Static-Tools-MSVC",
"configurePreset": "my-Static-Tools-MSVC",
"inherits": "ci-x64-Release-MSVC"
},
{
"name": "my-Static-Tools-Clang",
"configurePreset": "my-Static-Tools-Clang",
"inherits": "ci-x64-Release-Clang"
},
{
"name": "my-Static-Tools-GNUC",
"configurePreset": "my-Static-Tools-GNUC",
"inherits": "ci-x64-Release-GNUC"
},
{
"name": "my-Static-Tools-macos-GNUC",
"configurePreset": "my-Static-Tools-macos-GNUC",
"inherits": "ci-macos-Release-GNUC"
}
],
"workflowPresets": [
{
"name": "my-Static-Tools-MSVC",
"steps": [
{"type": "configure", "name": "my-Static-Tools-MSVC"},
{"type": "build", "name": "my-Static-Tools-MSVC"},
{"type": "test", "name": "my-Static-Tools-MSVC"},
{"type": "package", "name": "my-Static-Tools-MSVC"}
]
},
{
"name": "my-StdShar-Clang",
"steps": [
{"type": "configure", "name": "my-Static-Tools-Clang"},
{"type": "build", "name": "my-Static-Tools-Clang"},
{"type": "test", "name": "my-Static-Tools-Clang"},
{"type": "package", "name": "my-Static-Tools-Clang"}
]
},
{
"name": "my-StdShar-GNUC",
"steps": [
{"type": "configure", "name": "my-Static-Tools-GNUC"},
{"type": "build", "name": "my-Static-Tools-GNUC"},
{"type": "test", "name": "my-Static-Tools-GNUC"},
{"type": "package", "name": "my-Static-Tools-GNUC"}
]
},
{
"name": "my-Static-Tools-macos-GNUC",
"steps": [
{"type": "configure", "name": "my-Static-Tools-macos-GNUC"},
{"type": "build", "name": "my-Static-Tools-macos-GNUC"},
{"type": "test", "name": "my-Static-Tools-macos-GNUC"},
{"type": "package", "name": "my-Static-Tools-macos-GNUC"}
]
}
]
}

Discussion
  The above example shows how to build HDF5 with a static library and tools. The CMakeUserPresets.json file is located in the root directory of the HDF5 source. It is from here you execute:
  - `cmake –workflow –preset my-Static-Tools-<compiler-type> –fresh`
    where "<compiler-type>" is GNUC or MSVC or Clang or macos-GNUC
  If you don't need cross-compiler or cross-platform support, you can remove the compiler-specific presets and use the "my-Static-Tools" preset directly.

See Also
  Default CMakePresets.json Settings for details on the default settings for the StdShar presets.

## CMake Presets Use Case: S3 on linux

Problem
  I want to build the HDF5 library with the ros3 vfd.

Solution
  Create a CMakeUserPresets.json file with the following content:
  {
  "version": 6,
  "cmakeMinimumRequired": {
  "major": 3,
  "minor": 25,
  "patch": 0
  },
  "configurePresets": [
  {
  "name": "my-linux-S3",
  "hidden": true,
  "description": "Build HDF5 with library and tools for S3",
  "inherits": ["ci-base", "ci-S3", "ci-CompressionVars", "ci-StdExamples", "ci-StdPlugins"],
  "cacheVariables": {
  "HDF_PACKAGE_NAMESPACE": {"type": "STRING", "value": "hdf5::"},
  "HDF5_BUILD_SHARED_LIBS": "ON",
  "HDF5_BUILD_TOOLS": "ON",
  "HDF5_ENABLE_ZLIB_SUPPORT": "ON",
  "HDF5_ENABLE_LIBAEC": "ON",
  "HDF5_ENABLE_PLUGIN_SUPPORT": "ON"
  }
  },
  {
  "name": "my-linux-S3-Clang",
  "description": "Clang Standard Config for x64 (Release)",
  "inherits": [
  "ci-x64-Release-Clang",
  "ci-CPP",
  "ci-Fortran",
  "my-linux-S3"
  ]
  },
  {
  "name": "my-linux-S3-GNUC",
  "description": "GNUC Standard Config for x64 (Release)",
  "inherits": [
  "ci-x64-Release-GNUC",
  "ci-CPP",
  "ci-Fortran",
  "my-linux-S3"
  ]
  }
  ],
  "buildPresets": [
  {
  "name": "my-linux-S3-Clang",
  "description": "Clang Standard Build for x64 (Release)",
  "configurePreset": "my-linux-S3-Clang",
  "inherits": [
  "ci-x64-Release-Clang"
  ]
  },
  {
  "name": "my-linux-S3-GNUC",
  "description": "GNUC Standard Build for x64 (Release)",
  "configurePreset": "my-linux-S3-GNUC",
  "inherits": [
  "ci-x64-Release-GNUC"
  ]
  }
  ],
  "testPresets": [
  {
  "name": "my-linux-S3-Clang",
  "configurePreset": "my-linux-S3-Clang",
  "inherits": [
  "ci-x64-Release-Clang"
  ]
  },
  {
  "name": "my-linux-S3-GNUC",
  "configurePreset": "my-linux-S3-GNUC",
  "inherits": [
  "ci-x64-Release-GNUC"
  ]
  }
  ],
  "packagePresets": [
  {
  "name": "my-linux-S3-Clang",
  "configurePreset": "my-linux-S3-Clang",
  "inherits": "ci-x64-Release-Clang"
  },
  {
  "name": "my-linux-S3-GNUC",
  "configurePreset": "my-linux-S3-GNUC",
  "inherits": "ci-x64-Release-GNUC"
  }
  ],
  "workflowPresets": [
  {
  "name": "my-linux-S3-Clang",
  "steps": [
  {"type": "configure", "name": "my-linux-S3-Clang"},
  {"type": "build", "name": "my-linux-S3-Clang"},
  {"type": "test", "name": "my-linux-S3-Clang"},
  {"type": "package", "name": "my-linux-S3-Clang"}
  ]
  },
  {
  "name": "my-linux-S3-GNUC",
  "steps": [
  {"type": "configure", "name": "my-linux-S3-GNUC"},
  {"type": "build", "name": "my-linux-S3-GNUC"},
  {"type": "test", "name": "my-linux-S3-GNUC"},
  {"type": "package", "name": "my-linux-S3-GNUC"}
  ]
  }
  ]
  }

Discussion
  The above example shows how to build HDF5 with a static library and tools. The CMakeUserPresets.json file is located in the root directory of the HDF5 source. It is from here you execute:
  - `cmake –workflow –preset my-S3-<compiler-type> –fresh`
    where "<compiler-type>" is GNUC or Clang or macos-GNUC
  If you don't need cross-compiler support, you can remove the compiler-specific presets and use the "my-linux-S3" preset directly.

See Also
  Default CMakePresets.json Settings for details on the default settings for the StdShar presets.

## CMake Presets Use Case: Parallel Library

Problem
  I want to build the HDF5 library with a parallel compiler.

Solution
  Create a CMakeUserPresets.json file with the following content:
  {
  "version": 6,
  "cmakeMinimumRequired": {
  "major": 3,
  "minor": 25,
  "patch": 0
  },
  "configurePresets": [
  {
  "name": "my-linux-par",
  "hidden": true,
  "description": "Build HDF5 with library and tools using parallel compiler",
  "inherits": ["ci-base", "ci-CompressionVars", "ci-StdExamples"],
  "environment": {
  "CC": "mpicc"
  },
  "cacheVariables": {
  "HDF_PACKAGE_NAMESPACE": {"type": "STRING", "value": "hdf5::"},
  "HDF5_BUILD_SHARED_LIBS": "ON",
  "HDF5_BUILD_TOOLS": "ON",
  "MPIEXEC_NUMPROC_FLAG": "-n",
  "MPIEXEC_MAX_NUMPROCS": "2",
  "HDF5_ENABLE_PARALLEL": "ON",
  "HDF5_ENABLE_SUBFILING_VFD": "OFF",
  "HDF5_ENABLE_ZLIB_SUPPORT": "ON",
  "HDF5_ENABLE_LIBAEC": "ON",
  "HDF5_ENABLE_PLUGIN_SUPPORT": "OFF"
  }
  },
  {
  "name": "my-linux-par-mpich",
  "description": "mpich Standard Config for x64 (Release)",
  "inherits": [
  "ci-x64-Release-GNUC",
  "my-linux-par"
  ]
  }
  ],
  "buildPresets": [
  {
  "name": "my-linux-par-mpich",
  "description": "mpich Standard Build for x64 (Release)",
  "configurePreset": "my-linux-par-mpich",
  "inherits": [
  "ci-x64-Release-GNUC"
  ]
  }
  ],
  "testPresets": [
  {
  "name": "my-linux-serial-mpich",
  "configurePreset": "my-linux-par-mpich",
  "inherits": [
  "ci-x64-Release-GNUC"
  ],
  "filter": {
  "exclude": {
  "name": "MPI_TEST"
  }
  }
  },
  {
  "name": "my-linux-par-mpich",
  "configurePreset": "my-linux-par-mpich",
  "inherits": [
  "ci-x64-Release-GNUC"
  ],
  "filter": {
  "include": {
  "name": "MPI_TEST"
  }
  }
  }
  ],
  "packagePresets": [
  {
  "name": "my-linux-par-mpich",
  "configurePreset": "my-linux-par-mpich",
  "inherits": "ci-x64-Release-GNUC"
  }
  ],
  "workflowPresets": [
  {
  "name": "my-linux-par-mpich",
  "steps": [
  {"type": "configure", "name": "my-linux-par-mpich"},
  {"type": "build", "name": "my-linux-par-mpich"},
  {"type": "test", "name": "my-linux-serial-mpich"},
  {"type": "test", "name": "my-linux-par-mpich"},
  {"type": "package", "name": "my-linux-par-mpich"}
  ]
  }
  ]
  }

Discussion
  The above example shows how to build HDF5 with a parallel compiler. The CMakeUserPresets.json file is located in the root directory of the HDF5 source. It is from here you execute:
  - `cmake –workflow –preset my-linux-par-GNUC –fresh`

See Also
  Default CMakePresets.json Settings for details on the default settings for the StdShar presets.

## CMake Presets Use Case: Java Bindings

Problem
  I want to build HDF5 with Java bindings for use in Java applications.

Solution
  HDF5 provides two Java implementation options with the same API:
  - JNI (Java Native Interface) - Default, works with Java 8+, production-stable
  - FFM (Foreign Function & Memory) - Optional, requires Java 25+, modern native access
  Note: FFM will become the default in the next major HDF5 release as Java 25+ adoption increases.

JNI Build (Default - Java 8+)
  The standard presets automatically include JNI bindings when Java is detected:
  cmake --workflow --preset ci-StdShar-GNUC --fresh

This builds shared libraries with C++, Fortran, and Java JNI bindings. Java JNI requires shared libraries and cannot be built with static libraries.

FFM Build (Java 25+)
  For Java 25+ with FFM bindings, you need:
  - Java 25 or later (tested with Java 25 - Oracle distribution recommended)
  - jextract tool installed (download from https://jdk.java.net/jextract/)
  - Set JEXTRACT_HOME environment variable: `export JEXTRACT_HOME=$HOME/tools/jextract-25`
  cmake --workflow --preset ci-StdShar-GNUC-FFM --fresh

FFM bindings are generated automatically at CMake configure time and placed in the `build/java/jsrc/` directory. They are never committed to the repository and are always fresh for each build.

JNI vs FFM Comparison

  Feature | JNI (Default) | FFM (Future Default)
  --- | --- | ---
  Java Version | Java 8+ | Java 25+
  Build Requirements | Java JDK only | Java JDK + jextract tool
  Library Type | Shared only | Shared
  Generation | Pre-compiled native code | Auto-generated at configure time
  Performance | Mature, optimized | Modern, Project Panama
  API Compatibility | Identical - same hdf.hdf5lib.* package

Maven Artifacts
  To build platform-specific Maven artifacts for deployment:
  # JNI artifacts (default) - minimal build for artifacts only
  cmake --workflow --preset ci-MinShar-GNUC-Maven --fresh
  # FFM artifacts (Java 25+) - minimal build for artifacts only
  cmake --workflow --preset ci-MinShar-GNUC-Maven-FFM --fresh
  # Snapshot versions for development (adds -SNAPSHOT suffix)
  cmake --workflow --preset ci-MinShar-GNUC-Maven-Snapshot --fresh

Maven artifacts are deployed to:

- GitHub Packages: https://maven.pkg.github.com/HDFGroup/hdf5
- Maven Central (coming soon)

Platform Support
  Both JNI and FFM implementations support:
  - Linux x86_64
  - Windows x86_64
  - macOS x86_64
  - macOS aarch64 (Apple Silicon)
  Each platform requires a separate build with platform-specific classifiers in Maven artifacts.

Testing Java Bindings
  After building, test the Java bindings:
  # All Java tests (JNI or FFM depending on build)
  ctest -R "Java" -V
  # FFM-specific tests (if FFM build)
  ctest -R "JUnitFFM" -V

See Also
  - Maven Artifact Selection for using pre-built Maven artifacts
  - docs/INSTALL_CMake.md Section XIII for Java FFM testing details
  - release_docs/README.md for comprehensive Java documentation
  - HDF5Examples/JAVA for Java example programs

# CMake Presets

Presets are a way to store a set of CMake cache variables in a file. This allows you to save and load a set of variables that you use frequently. Presets can be used to save the configuration of a project for different build configurations, such as Debug and Release.

CMake supports two main files, CMakePresets.json and CMakeUserPresets.json, that allow users to specify common configure options and share them with others. CMake also supports files included with the include field.

## CMakePresets.json

HDF Group provides a CMakePresets.json file, used by the github workflows, that includes the following StdShar presets:

- ci-StdShar-MSVC - use MSVC compiler
- ci-StdShar-Clang - use Clang compiler
- ci-StdShar-macos-Clang -Apple Clang compiler
- ci-StdShar-GNUC - use GNU compiler
- ci-StdShar-macos-GNUC - use Apple GNU compiler
- ci-StdShar-GNUC-S3 - use GNU compiler with S3 support
- ci-StdShar-Intel - use Intel OneAPI compiler
- ci-StdShar-win-Intel - use Intel OneAPI compiler on Windows

The StdShar presets are used by the GitHub workflows to build and test the HDF5 library on different platforms and compilers. The CMakePresets.json file is located in the root directory of the HDF5 repository. The StdShar presets inherit the following settings:

- ci-CPP - enables C++ support
- ci-Fortran - enables Fortran support, except on macOS
- ci-Java - enables Java support
- ci-StdShar - described below

The ci-StdShar preset inherits the following settings:

- ci-StdCompression
- ci-StdExamples
- ci-StdPlugins

See the CMakePresets.json file for the complete list of presets and settings. The Default CMakePresets.json Settings section provides an overview of the default settings for the StdShar presets.

## Default CMakePresets.json Settings

The ci-StdShar preset sets the following cache variables:

- "HDF_PACKAGE_NAMESPACE": {"type": "STRING", "value": "hdf5::"}
- "HDF5_INSTALL_MOD_FORTRAN": "NO"
- "HDF5_ENABLE_ALL_WARNINGS": "ON"
- "HDF5_MINGW_STATIC_GCC_LIBS": "ON"
- "HDF_TEST_EXPRESS": "2"

The ci-StdExamples preset inherits the following settings:

- ci-base
- ci-base-tgz

The ci-StdExamples preset sets the following cache variables:

- "HDF5_PACK_EXAMPLES": "ON"
- "EXAMPLES_DOWNLOAD": "ON"

The ci-StdPlugins preset inherits the following settings:

- ci-base-plugins
- ci-PluginsVars
- ci-base-tgz

The ci-StdPlugins preset sets the following cache variables:

- "PLUGIN_USE_LOCALCONTENT": "OFF"

The ci-PluginsVars preset sets the following cache variables (see the https://github.com/HDFGroup/hdf5/blob/develop/config/CacheURLs.cmake file for the latest versions):

- "HDF5_ENABLE_PLUGIN_SUPPORT": "ON"
- "H5PL_ALLOW_EXTERNAL_SUPPORT": {"type": "STRING", "value": "TGZ"}
- "HDF5_FILTER_PLUGINS_PACKAGE_NAME": {"type": "STRING", "value": "h5pl"}
- "HDF5_FILTER_PLUGINS_TGZ_ORIGPATH": {"type": "STRING", "value": "hdf5_plugins download"}
- "HDF5_FILTER_PLUGINS_TGZ_NAME": {"type": "STRING", "value": "hdf5_plugins-master.tar.gz"}

The ci-base-plugins preset sets the following cache variables (see the https://github.com/HDFGroup/hdf5/blob/develop/config/CacheURLs.cmake file for the latest versions):

- "BITGROOM_PACKAGE_NAME": {"type": "STRING", "value": "bitgroom"},
- "BITROUND_PACKAGE_NAME": {"type": "STRING", "value": "bitround"},
- "BSHUF_TGZ_NAME": {"type": "STRING", "value": "bitshuffle-x.y.z.tar.gz"}
- "BSHUF_PACKAGE_NAME": {"type": "STRING", "value": "bshuf"}
- "BLOSC_TGZ_NAME": {"type": "STRING", "value": "c-blosc-x.y.z.tar.gz"}
- "BLOSC_PACKAGE_NAME": {"type": "STRING", "value": "blosc"}
- "BLOSC_ZLIB_TGZ_NAME": {"type": "STRING", "value": "zlib-x.y.z.tar.gz"}
- "BLOSC_ZLIB_PACKAGE_NAME": {"type": "STRING", "value": "zlib"}
- "BLOSC2_TGZ_NAME": {"type": "STRING", "value": "c-blosc2-x.y.z.tar.gz"}
- "BLOSC2_PACKAGE_NAME": {"type": "STRING", "value": "blosc2"}
- "BLOSC2_ZLIB_TGZ_NAME": {"type": "STRING", "value": "zlib-x.y.z.tar.gz"}
- "BLOSC2_ZLIB_PACKAGE_NAME": {"type": "STRING", "value": "zlib"}
- "BZ2_TGZ_NAME": {"type": "STRING", "value": "bzip2-bzip2-x.y.z.tar.gz"}
- "BZ2_PACKAGE_NAME": {"type": "STRING", "value": "bz2"}
- "FPZIP_TGZ_NAME": {"type": "STRING", "value": "fpzip-x.y.z.tar.gz"}
- "FPZIP_PACKAGE_NAME": {"type": "STRING", "value": "fpzip"}
- "JPEG_TGZ_NAME": {"type": "STRING", "value": "jpegsrc.v9e.tar.gz"}
- "JPEG_PACKAGE_NAME": {"type": "STRING", "value": "jpeg"}
- "BUILD_LZ4_LIBRARY_SOURCE": "ON"
- "LZ4_TGZ_NAME": {"type": "STRING", "value": "lz4-x.y.z.tar.gz"}
- "LZ4_PACKAGE_NAME": {"type": "STRING", "value": "lz4"}
- "LZF_TGZ_NAME": {"type": "STRING", "value": "liblzf-x.y.z.tar.gz"}
- "LZF_PACKAGE_NAME": {"type": "STRING", "value": "lzf"}
- "SZ_TGZ_NAME": {"type": "STRING", "value": "SZ-x.y.z.tar.gz"}
- "SZ_PACKAGE_NAME": {"type": "STRING", "value": "SZ"}
- "ZFP_TGZ_NAME": {"type": "STRING", "value": "zfp-x.y.z.tar.gz"}
- "ZFP_PACKAGE_NAME": {"type": "STRING", "value": "zfp"}
- "ZSTD_TGZ_NAME": {"type": "STRING", "value": "zstd-x.y.z.tar.gz"}
- "ZSTD_PACKAGE_NAME": {"type": "STRING", "value": "zstd"}

The ci-StdCompression preset inherits the following settings:

- ci-base-tgz
- ci-CompressionVars

The ci-StdCompression preset sets the following cache variables:

- "HDF5_PACKAGE_EXTLIBS": "ON"
- "HDF5_USE_ZLIB_NG": "OFF"
- "ZLIB_USE_LOCALCONTENT": "OFF"
- "LIBAEC_USE_LOCALCONTENT": "OFF"
- "HDF5_USE_ZLIB_STATIC": "ON"
- "HDF5_USE_LIBAEC_STATIC": "ON"

The ci-CompressionVars preset sets the following cache variables (see the https://github.com/HDFGroup/hdf5/blob/develop/config/CacheURLs.cmake file for the latest versions):

- "ZLIB_PACKAGE_NAME": {"type": "STRING", "value": "zlib"}
- "ZLIB_TGZ_ORIGPATH": {"type": "STRING", "value": "zlib download"}
- "ZLIB_TGZ_NAME": {"type": "STRING", "value": "zlib-x.y.z.tar.gz"}
- "ZLIBNG_PACKAGE_NAME": {"type": "STRING", "value": "zlib-ng"}
- "ZLIBNG_TGZ_ORIGPATH": {"type": "STRING", "value": "zlib-ng download"}
- "ZLIBNG_TGZ_NAME": {"type": "STRING", "value": "x.y.z.tar.gz"}
- "LIBAEC_PACKAGE_NAME": {"type": "STRING", "value": "libaec"}
- "LIBAEC_TGZ_ORIGPATH": {"type": "STRING", "value": "libaec download"}
- "LIBAEC_TGZ_NAME": {"type": "STRING", "value": "libaec-x.y.z.tar.gz"}

The ci-base-tgz preset inherits the following settings:

- ci-base

The ci-base-tgz preset sets the following cache variables:

- "HDF5_ALLOW_EXTERNAL_SUPPORT": {"type": "STRING", "value": "TGZ"}
- "TGZPATH": {"type": "PATH", "value": "${sourceParentDir}/temp"}

The ci-base preset sets the following CMake variables:

- "name": "ci-base"
- "displayName": "Basic Config"
- "description": "Basic build using Ninja generator"
- "generator": "Ninja"
- "binaryDir": "${sourceParentDir}/build/${presetName}"
- "installDir": "${sourceParentDir}/install/${presetName}"

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