Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.arcetri.astro.it/~lfini/ArtOfmakefile.pdf Дата изменения: Tue Feb 5 14:29:38 2013 Дата индексирования: Sat Apr 9 23:43:12 2016 Кодировка: Поисковые слова: arp 220

The art of Makefile


The use of make is a traditional, simple and effective way to develop programs The make command executes instructions from a Makefile Commands from the file are not necessarily executed sequentially If you use a modern development system (e.g.: Eclipse) you don't need a Makefile
The art of Makefile







Feb. 5, 20013


Program development


You have a main program file: main.c
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Main.c uses three subprograms


subprog1.c
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Includes subprog1.h Includes constants.h Includes subprog2.h ... ...



subprog2.c
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subprog1.c
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To build the executable you must compile the four source files and link them together
The art of Makefile

Feb. 5, 20013


The Makefile

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The art of Makefile


Dependency



main.o depends on ...

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The art of Makefile


Build command

TAB



Command to execute to resolve the dependency

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The art of Makefile


Processing a Makefile: make


Get the first dependency in Makefile Resolve dependencies recursively:
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Resolve main.o


Resolve main.c: depends on nothing stop recursion ... If any dependency file is more recent than main.o, rebuild

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Resolve subprog1.o, etc. .... If any dependency file is more recent than main, rebuild
The art of Makefile

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Processing a Makefile: make xxx


Any dependency other than the first must be explicitly requested: make clear resolves the following dependency:

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The art of Makefile


Macros

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The art of Makefile


Implicit rules, special macros, etc.

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The art of Makefile


Automatic variables


$< $@ $? ...

The name of the first prerequisite. The file name of the target of the rule.

All the prerequisites newer than the target

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The art of Makefile


Implicit rules, special macros, etc.

Feb. 5, 20013

The art of Makefile