how to create makefiles in cpp

[sirichennupati]

we have been working with a project and we need to create the executables
could u please help us in this aspect

we tried make files this way

vi lab.make

lab.out:prog1.o
g++ -o lab.out prog1.o
prog1.o:prog1.cpp stdio.h
g++ -c prog1.cpp

we executed with
make -f lab.make

its displaying error as fatal error at end of line
thanks in advance

[JosAH]

we have been working with a project and we need to create the executables
could u please help us in this aspect

we tried make files this way

vi lab.make

lab.out:prog1.o
g++ -o lab.out prog1.o
prog1.o:prog1.cpp stdio.h
g++ -c prog1.cpp

we executed with
make -f lab.make

its displaying error as fatal error at end of line
thanks in advance

There should be a tab (or at least a space) as the leading character of the
command execution line; like this:

lab.out:prog1.o
        g++ -o lab.out prog1.o
prog1.o:prog1.cpp stdio.h
        g++ -c prog1.cpp
 

kind regards,

Jos

[Girish Kanakagiri]

we have been working with a project and we need to create the executables
could u please help us in this aspect

we tried make files this way

vi lab.make

lab.out:prog1.o
g++ -o lab.out prog1.o
prog1.o:prog1.cpp stdio.h
g++ -c prog1.cpp

we executed with
make -f lab.make

its displaying error as fatal error at end of line
thanks in advance

Did you get error free execution ?

Regards,
Girish.

[weaknessforcats]

(or at least a space)

Check the O'Reilly book on make. I think this needs to be a tab.

[JosAH]

Check the O'Reilly book on make. I think this needs to be a tab.

Yes, old makes need a tab; GNU make for example is happy with one or more
spaces too (hurray for user friendliness! ;-)

kind regards,

Jos