set(LLVM_LIBC_MPFR_INSTALL_PATH "" CACHE PATH "Path to where MPFR is installed (e.g. C:/src/install or ~/src/install)") if(LLVM_LIBC_MPFR_INSTALL_PATH) set(LIBC_TESTS_CAN_USE_MPFR TRUE) else() try_compile( LIBC_TESTS_CAN_USE_MPFR ${CMAKE_CURRENT_BINARY_DIR} SOURCES ${LIBC_SOURCE_DIR}/utils/MPFRWrapper/check_mpfr.cpp LINK_LIBRARIES -lmpfr -lgmp ) endif()