Worked on the open-mpi/ompi repository to address a build failure encountered when Fault Tolerance (FT) features were disabled. Delivered a targeted fix by implementing conditional compilation in C, ensuring that the agree and iagree functions are only included when OPAL_ENABLE_FT_MPI is defined. This approach prevented compilation errors in FT-disabled configurations, improving build system reliability for users opting out of FT-MPI. Leveraged expertise in C programming, preprocessor directives, and Autotools-based build configuration to enhance the project’s configurability. The work strengthened continuous integration stability and ensured successful builds across both FT-enabled and FT-disabled deployment scenarios within the codebase.