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Apr 8th, 2009

the most simple makefile ever

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hi, this is embarrassing, for whatever reason I am getting "Don't know how to make target driver.o" whenever i type make. There is only one file named "driver.cpp" in the directory that i have to compile. I am staring at tutorials and don't understand why this won't work.

heres whats in the make file

C++ Syntax (Toggle Plain Text)
run: driver.o
       CC -o run driver.o
driver.o: driver.cpp
       CC -c driver.cpp
run: driver.o
       CC -o run driver.o
driver.o: driver.cpp
       CC -c driver.cpp

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kyosuke0

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Apr 9th, 2009

Re: the most simple makefile ever

You do realize that you cannot use spaces. You must use tabs.

nucleon

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Apr 9th, 2009

Re: the most simple makefile ever

Click to Expand / Collapse Quote originally posted by nucleon ...

You do realize that you cannot use spaces. You must use tabs.

yes, but you cannot use the tab key in the forum message box so i used spaces to simulate the tab. The actual make file has tabs and the newline so i know those are not the problem, also I am using sun's c++ CC compiler in linux. sorry for the confusion

kyosuke0

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Apr 9th, 2009

Re: the most simple makefile ever

Does this line work if you type it into a console in the proper directory?

CC -c driver.cpp

When I used unix I only used C. Is CC (as opposed to cc) the C++ compiler?

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Re: the most simple makefile ever

Click to Expand / Collapse Quote originally posted by nucleon ...

Does this line work if you type it into a console in the proper directory?

CC -c driver.cpp

When I used unix I only used C. Is CC (as opposed to cc) the C++ compiler?

yes if i compile the file manually it produces an executable, and yes to your second question as well, the sun studio 12 suite i believe its called

kyosuke0

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Apr 9th, 2009

Re: the most simple makefile ever

I don't currently have access to Solaris ATM... alas, but perhaps it is something as simple as needing a blank line after each target:

C++ Syntax (Toggle Plain Text)
CC = cc
 
run: driver.o
	CC -o run driver.o
 
driver.o: driver.cpp
	CC -c driver.cpp
CC = cc

run: driver.o
	CC -o run driver.o

driver.o: driver.cpp
	CC -c driver.cpp

BTW, you can have tabs in the forum message boxes, but you have to cut and paste them in...

(So you can just cut and paste this code block into a file and it would work.)

The CC is a makefile macro. Sun's compiler is "cc". (I think...)

Hope this helps.

Last edited by Duoas; Apr 9th, 2009 at 1:15 pm.

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