"make" system
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This document discusses the make tool and its usage. Make is used to automatically execute commands based on file dependencies in order to rebuild programs and packages. It is configured using makefiles which specify rules and dependencies between targets. Makefiles allow rebuilding portions of a program automatically when source files change. Examples are provided to demonstrate basic makefile rules and usage of make for compiling C programs.
"make" system
- 1. “make” System © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> All Rights Reserved.
- 2. What to Expect? What is 'make' & its System? Learning 'make' by Examples © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> 2 All Rights Reserved.
- 3. What is 'make'? Tool to automatically execute commands Any number, Any length Based on complete dependency chains Typically based on time (of change) Majorly replacing the manual process Effectively saving time & manual errors Typical usages Project build system (compilation, etc) Packaging files (binaries, documentation, source code) Installations (of Systems, Packages, ...) Anything that can be automated based on dependencies © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> 3 All Rights Reserved.
- 4. Usage of 'make' Initiated by the command 'make' Controlled by its configuration files Containing rules to execute various commands Based on various target dependencies Default configuration files GNUmakefile, makefile, Makefile (in that order) Other configuration file using -f Assisted by many in-built rules & variables © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> 4 All Rights Reserved.
- 5. Typical Rule target: dependencies <tab>action <tab>action <tab>... Example abc: pqr cp pqr abc © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> 5 All Rights Reserved.
- 6. Sample Makefile xyz: abc cp abc xyz abc: pqr cp pqr abc pqr: touch pqr © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> 6 All Rights Reserved.
- 7. Let's create a Makefile for Automatically compiling a C program © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> 7 All Rights Reserved.
- 8. Extending the Makefile Build an executable from many C files Build a project with 10,000 C files Add the user's header file dependencies Automatic header dependency generation © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> 8 All Rights Reserved.
- 9. What all have we learnt? 'make' & its benefits Usage of 'make' Examples of using 'make' © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> 9 All Rights Reserved.
- 10. Any Queries? © 2010 Anil Kumar Pugalia <email@sarika-pugs.com> 10 All Rights Reserved.