How to create makefile for compiling multiple programms

hellopenguin · 10-19-2014, 02:29 PM

I am newbie , so have some problems with creating makefile. I have tried to compile them from terminal and found right options for gcc to do this. But I have some troubles with creating one makefile to compile to do all this tasks. Here is my commands that work.

Code:

gcc -c pstree.c -DHAVE_CONFIG_H -I.
gcc -o hello pstree.o -L/usr/lib/ -ltinfo

gcc -c fuser.c -DHAVE_CONFIG_H -I.
gcc -c -o libsignals.a signals.c
gcc -o hello fuser.o -L/usr/lib/ -L. -lsignals

gcc -c -o libsignals.a signals.c
gcc -o hello killall.o -L/usr/lib/ -L. -lsignals
gcc -c killall.c -DHAVE_CONFIG_H -I.

Please help with creating makefile for this purpose. Thanks in advance.

pan64 · 10-20-2014, 04:25 AM

the syntax of a makefile is something like this (simplified):

Code:

target: dependency
<tab>rule

where target is the file you want to create, the dependency is (are) the source file(s) to be used and the rule will tell how should we produce the target from the sources.
For example:

Code:

pstree.o: pstree.c
<tab>gcc -c pstree.c -DHAVE_CONFIG_H -I.
hello: pstree.o
<tab>gcc -o hello pstree.o -L/usr/lib/ -ltinfo