NVIDIA HPC COMPILERS REFERENCE GUIDE PR-09861-001-V20.9 | September 2020 TABLE OF CONTENTS Preface..........................................................................................................................................................ix Audience Description...............................................................................................................................ix Compatibility and Conformance to Standards.......................................................................................ix Organization.............................................................................................................................................. x Hardware and Software Constraints......................................................................................................xi Conventions.............................................................................................................................................. xi Terms.......................................................................................................................................................xii Chapter 1. Fortran, C++ and C Data Types................................................................................................ 1 1.1. Fortran Data Types........................................................................................................................... 1 1.1.1. Fortran Scalars.......................................................................................................................... 1 1.1.2. FORTRAN real(2)........................................................................................................................ 3 1.1.3. FORTRAN 77 Aggregate Data Type Extensions........................................................................3 1.1.4. Fortran 90 Aggregate Data Types (Derived Types).................................................................. 4 1.2. C and C++ Data Types...................................................................................................................... 5 1.2.1. C and C++ Scalars..................................................................................................................... 5 1.2.2. C and C++ Aggregate Data Types............................................................................................. 6 1.2.3. Class and Object Data Layout...................................................................................................7 1.2.4. Aggregate Alignment................................................................................................................. 7 1.2.5. Bit-field Alignment.....................................................................................................................8 1.2.6. Other Type Keywords in C and C++.......................................................................................... 9 Chapter 2. Command-Line Options Reference........................................................................................ 10 2.1. HPC Compilers Option Summary.................................................................................................. 10 2.1.1. Acceleration and Optimization-Related Compiler Options.................................................... 11 2.1.2. Build-Related Options..............................................................................................................11 2.1.3. Debug-Related Compiler Options........................................................................................... 13 2.1.4. Linking and Runtime-Related Compiler Options................................................................... 14 2.2. Generic Compiler Options.............................................................................................................. 15 2.2.1. -#...............................................................................................................................................15 2.2.2. -acc........................................................................................................................................... 15 2.2.3. -Bdynamic.................................................................................................................................16 2.2.4. -byteswapio...............................................................................................................................17 2.2.5. -C...............................................................................................................................................17 2.2.6. -c............................................................................................................................................... 18 2.2.7. -c++libs......................................................................................................................................18 2.2.8. -cuda......................................................................................................................................... 19 2.2.9. -cudalib..................................................................................................................................... 19 2.2.10. -D.............................................................................................................................................20 2.2.11. -d<arg>....................................................................................................................................21 2.2.12. -dryrun.................................................................................................................................... 22 2.2.13. -drystdinc................................................................................................................................ 22 NVIDIA HPC Compilers Reference Guide Version 20.9 | ii 2.2.14. -E............................................................................................................................................. 23 2.2.15. -F............................................................................................................................................. 23 2.2.16. -fast......................................................................................................................................... 24 2.2.17. --flagcheck..............................................................................................................................24 2.2.18. -fortranlibs..............................................................................................................................25 2.2.19. -fpic......................................................................................................................................... 25 2.2.20. -fPIC........................................................................................................................................ 26 2.2.21. -g............................................................................................................................................. 26 2.2.22. -g77libs................................................................................................................................... 27 2.2.23. -gopt........................................................................................................................................27 2.2.24. -gpu......................................................................................................................................... 28 2.2.25. -help........................................................................................................................................ 30 2.2.26. -I.............................................................................................................................................. 31 2.2.27. -i2, -i4, -i8...............................................................................................................................32 2.2.28. -K<flag>...................................................................................................................................33 2.2.29. -L............................................................................................................................................. 35 2.2.30. -l<library>................................................................................................................................35 2.2.31. -M............................................................................................................................................ 36 2.2.32. -M<nvflag>.............................................................................................................................. 36 2.2.33. -m............................................................................................................................................41 2.2.34. -mcmodel=medium................................................................................................................ 42 2.2.35. -module <moduledir>............................................................................................................ 42 2.2.36. -mp..........................................................................................................................................43 2.2.37. -noswitcherror........................................................................................................................44 2.2.38. -O<level>................................................................................................................................