GCC compiler
- 1. 1 GCC Compiler Presented by: Anil pokhrel BscCSIT 6th semester
- 2. 2 Contents • History of GCC • Introduction to GCC • Options in GCC • Conclusion
- 3. History of GCC • The original GNU C Compiler (GCC) is developed by Richard Stallman, the founder of the GNU Project. • Richard Stallman founded the GNU project in 1984 to create a complete Unix-like operating system as free software, to promote freedom and cooperation among computer users and programmers.
- 4. 4 Introduction to GCC • Stands for GNU C/C++ Compiler • A popular console-based compiler for *NIX platforms and others; can cross-compile code for various architectures • gcc to compile C programs; • g++ for C++ • can actually work with also Java and a couple other languages
- 6. To compile: -c 1. gcc performs compilation and assembly of the source file without linking. 2. The output are usually object code files, .o; they can later be linked and form the desired executables. 3. Generates one object file per source file keeping the same prefix (before .) of the filename. 4. gcc main.c
- 7. Options: -o <filename> • Places resulting file into the filename specified instead of the default one. • Can be used with any generated files (object, executables, assembly, etc.) • If you have the file called source.c; the defaults are: • source.o if -c was specified • a.out if executable • These can be overridden with the -o option. • gcc main.c -o main
- 8. Options: -g •Includes debugging info in the generated object code. This info can later be used in gdb. •gcc allows to use -g with the optimization turned on (-O) in case there is a need to debug or trace the optimized code.
- 9. Options: -Wall • Shows most of the warnings related to possibly incorrect code. • Wall is a combination of a large common set of the -W options together. These typically include: • unused variables • possibly uninitialized variables when in use for the first time • defaulting return types • missing braces and parentheses in certain context that make it ambiguous • etc.
- 10. Options: -ansi • For those who are picky about standard compliance and to ensures the code compiled complies with the ANSI C standard; • These options can be quite annoying for those who don’t know C well since gcc will refuse to compile unkosher C code, which otherwise it has no problems with. • $ gcc -Wall -ansi main.c -o main
- 11. Conclusion
- 12. Refferences • https://www.geeksforgeeks.org/gcc-command-in-linux- with-examples/ • https://www.rapidtables.com/code/linux/gcc.html • https://en.wikipedia.org/wiki/GNU_Compiler_Collection • https://www.thegeekstuff.com/2012/10/gcc-compiler- options/
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