Worked on the Rdatatable/data.table repository to enable OpenMP parallel processing support for R 4.2, addressing a critical build failure that previously blocked parallel data.table operations on this version. The solution involved exporting the correct OpenMP flags to both the C preprocessor and linker, ensuring compatibility and reliability across diverse build environments. Using expertise in build systems, C/C++ compilation, and shell scripting, the work improved the robustness of the build process and paved the way for enhanced performance on large datasets. This update maintained API compatibility while unlocking multi-core processing capabilities for users deploying data.table with R 4.2.