1. Introduction Purpose This training course introduces the free GNU tools that can be used for debugging embedded system application software in the Renesas HEW (High-performance Embedded Workshop) integrated development environment. Objectives Learn about the history, license, benefits, prerequisites, and other basic aspects of GNU tools. Understand GNU terminology and toolchain contents. Learn basic facts about KPIT GNU tools and credentials. Know where to go for additional information Content 18 pages 2 questions Learning Time 35 minutes

2. Recursive acronym for "GNU's Not Unix“ UNIX-compatible software system GNU project is “Free software” developed by Free Software Foundation (FSF), founded by Richard Stallman GNU General Public License (GPL) — Intended to guarantee the freedom to share and change free software What Is GNU? 1983198419851989 Plan for GNU project announced by Stallman Software development started 1991 FSF established by Stallman First version of GNU GPL released GNU/Linux: Integrated combination of GNU operating system with the “Linux Kernel” written by Linus Torvalds in 1991 History of GNU

3. Basic GNU Philosophy: Produce open, non-proprietary software GNU operating system is free software - Gives users freedom to run, copy, distribute, study, change, and improve the software - Has only one restriction: Users cannot limit further redistribution - Provides freedom that is a matter of liberty, not price GNU Freedom, Benefits Because GNU software is open, it … - Is fast, powerful, and more portable than its proprietary counterparts - Evolves more rapidly than proprietary code, since users who want to make improvements are free to do so

4. GPL allows you to: Redistribute copies of free software Obtain the source code Change the source code or use pieces of it in new free programs However... Changed source code must also be under GPL General Public License For more information: http://www.gnu.org/licenses/gpl-faq.html http://www.gnu.org/philosophy/selling.html

5. GNU Compiler GNU Debugger GNU Assembler GNU Linker Other utilities Binutils GNU Tools What are GNU Tools? Complete set of tools for development of application software for embedded systems. C Libraries

6. Cost Available freely in source format Host platform Easily ported to multiple host platforms, such as Windows, Unix, and Linux Target platform Support available for a wide range of target CPUs, and new CPUs can be added easily Language Support provided for all widely-used and standardized compiler languages: C, C++, Java, Ada, Fortran Obsolescence Not an issue, due to open-source implementation Portability Possesses uniform assembler language, linker syntax Vendors Users aren’t locked to any vendor, nor limited to set of suppliers Why Use GNU Tools?

7. Pros - Tools are free - Source code is included - Bugs are fixed quickly and help is readily available through a vast support network on the Internet - Mailing lists are available for queries and enhancements Cons - No one commercial company is responsible for GNU tools Pros and Cons of GNU Tools

8. Which of these statements correctly describe the advantages of using GNU tools? Select all that apply and then click Done. A.GNU software is open, so it is more portable, evolves more rapidly, and is less prone to obsolescence than its proprietary counterparts. B.GNU software is free software, so it is always redistributed without cost. C.Recipients of the GNU GPL can change the source code, but this changed code must also be under GPL. D.GNU development tools include a compiler, debugger, assembler, linker, and other binary utilities. Question Done

9. GNU Tools Checklist: Sources downloaded from FSF websites Linux or Unix Emulator (such as Cygwin) for building Disk space to process the data Knowledge about the build procedure Prerequisites for Using Tools

10. Build system – System on which the tools are built Host system – System on which the tools will run Target system – System for which the tools generate code Cross compiler – Compiler that produces programs that run on a different system Windows System SH Embedded System HOSTTARGET Development team needs a compiler that executes in the Windows environment, but produces executable code that can run on an SH target. Thus, it needs a cross compiler. Terminology Typical Application Development Situation

11. GCC: Compiler source code Binutils: Contains the source code of the assembler, linker, and other binary utilities such as “objcopy,” “nm,” “ranlib,” etc. Newlib: Collection of C libraries, including math library and various board-support packages ["libgloss"] for embedded systems GDB: GNU’s source-level debugger that lets you see what is going on “inside” your program while it executes Contents of GNU Toolchain

12. GCC: Includes front ends for C, C++, Objective-C, Fortran, Java, and Ada, as well as libraries for these languages (libstdc++, libgcj, etc.) Works on native and cross targets Supports popular target processors, including Renesas SuperH, M16C, and H8 families, as well as ARM and MIPS chips Has source code consisting of GCC and many binary utilities such as ld, objcopy, strip, etc. Provides Configure scripts and Makefiles for configuring and building the GCC toolchain for host and target systems GNU Compiler Source Code

13. GNU as GCC.c File GNU ld ELF.out Newlib Target assembly code Relocatable machine code Absolute machine code Source program Source code Compiler Assembler Linker Object code GNU Compilation Process Libraries

14. Proven, pre-built, proven binary tools that allow more time for application development - Compiler source code, Binutils, Newlib, and GDB source-level debugger that shows what is happening inside program as it executes Tested and optimized for Renesas targets Free and easy to use Available for Windows and Linux platforms Easy download and installation Integrated with Renesas’ proprietary tools Free technical support at dedicated web portal - GDB stubs, monitor programs, tutorials, documentation, FAQs, and discussion forum KPIT GNU Tools

15. Support for all Renesas devices Supporting Renesas processors for last 5 years Free and easy download + easy installation Posted more than 90 patches to FSF Maintainer & check-in rights for different GNU tools FREE and prompt technical support 8500+ registered users 2100+ downloads per month KPIT GNU Tools Credentials Best GNU package for Renesas processors

16. KPIT GNU Tools for Renesas targets: http://www.kpitgnutools.com GNU Compiler Collection (gcc): http://gcc.gnu.org/ Binary Utilities (binutils): http://sourceware.org/binutils/ Standard Libraries (newlib): http://sourceware.org/newlib/ GNU Debugger (gdb): http://sourceware.org/gdb/ GNU Packages: http://www.gnu.org/software http://directory.fsf.org/GNU http://ftp.gnu.org Sources for More Information

17. Match each GNU item to the most appropriate explanation by dragging the letters on the left to the correct locations on the right. Click Done when you are finished. GDB Binutils B D Done Reset Show Solution A GNU source-level debugger that lets you see what is going on “inside” your program A C GCC Executes in one system but can produce programs that run in a different system B Contain the source code of the assembler, linker, and other binary utilities D Cross Compiler C Compiler source code that includes front ends for C, C++, Objective-C, Fortran, Java, and ADA Question

18. Basic information about GNU tools Reasons for using them Prerequisites for using them KPIT GNU tools References Course Summary For more information, please visit our Web site: http://america.renesas.com