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Makefiles

Objectives:

• Create Makefiles
• Read and (partially) understand makefiles

Program structure:

• local variables -> file.c
• global variables -> header.h

graph -> makefile rules:

target(s): dependencies/prerequisites
<TAB>command(s)

explicit rules, 2 passes, updates old targets only

variables

Implicit rules (old style)

Implicit rules (new style)

Phony targets:

Other features:

• include
• asignment and operations with variables:  =  :=   +=   define ... endef
• functions for transforming text $(OBJ:.o=.c), conditionals, iterations, shell
• dedicated variables: CC, CFLAGS, MAKE

The command:
make <options> <target>

Documentation:

Manual: http://www.gnu.org/software/make/manual/make.html

Tutorials:

• http://www.eng.hawaii.edu/Tutor/Make/index.html
• http://oucsace.cs.ohiou.edu/~bhumphre/makefile.html
• http://mrbook.org/tutorials/make/
• http://vertigo.hsrl.rutgers.edu/ug/make_help.html

Alternatives:  ANT, jam
Automated building of makefiles: autoconf

Automated dependencies: makedepend