Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: actions/cache@v4.2.0, lukka/get-cmake@v4.2.0. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Node.js 20 will be removed from the runner on September 16th, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

'strcpy': This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

discarding return value of function with [[nodiscard]] attribute [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

discarding return value of function with [[nodiscard]] attribute [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

discarding return value of function with [[nodiscard]] attribute [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

discarding return value of function with [[nodiscard]] attribute [D:\a\h5pp\h5pp\build\github-actions-conan-win\examples\h5pp-example-01a-int.vcxproj]

Node.js 20 actions are deprecated. The following actions are running on Node.js 20 and may not work as expected: actions/cache@v4.2.0, lukka/get-cmake@v4.2.0. Actions will be forced to run with Node.js 24 by default starting June 2nd, 2026. Node.js 20 will be removed from the runner on September 16th, 2026. Please check if updated versions of these actions are available that support Node.js 24. To opt into Node.js 24 now, set the FORCE_JAVASCRIPT_ACTIONS_TO_NODE24=true environment variable on the runner or in your workflow file. Once Node.js 24 becomes the default, you can temporarily opt out by setting ACTIONS_ALLOW_USE_UNSECURE_NODE_VERSION=true. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]

C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]

discarding return value of function with [[nodiscard]] attribute [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]

C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]

C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]

discarding return value of function with [[nodiscard]] attribute [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]

C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]

C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]

discarding return value of function with [[nodiscard]] attribute [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]

C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\src\external_fmt-build\fmt.vcxproj] [D:\a\h5pp\h5pp\build\github-actions-cmake-win\pkg-build\external_fmt.vcxproj]