[ECOS] Re: about makefile

[Nick Garnett <nickg at ecoscentric dot com>]

ÕÅ ÁÁ <johnsonest@hotmail.com> writes:

> Dear nickg,
>    i have difficulty in orgnizing my header file and source file with
> makefile:
> I create two folder ,named after "include" and "src" in current directory:
> >ls
> include src test.c
> 
> in test.c, i want to call codes in "include" and "src" folder:
> 
> #include <stdio.h>
> #include "cs.h" //in include folder
> 
> int main()  {
> ....
> ...
> call fucntions in  file "cs.c" in folder "src"
> ...
>  }
> 
> to compile this
> my makefile is:
> 
> HEADER_DIR = include
> test:  test.o cs.o 	gcc -o test  test.o cs.o
> test.o: test.c cs.h 	gcc -c test.c  cs.o : cs.c cs.h
>          gcc -c cs.c -I$(SOURCE_DIR)  clean:
> 	-rm *.o
> 
> but:
> >make
> make: *** No rule to make target `cs.c', needed by `cs.o'.  Stop.
> in fact,my cs.c is a set of functions called each other,no entry function.
> 
> i am a newcomer about makefile,could you check my makefile ,tell me
> where error occur?
> 

This is not really relevant to eCos, and it is not my job to teach you
how to use make, but I'll give you a few pointers:

Make does not know that you want it to look into the src subdirectory
for cs.c. You need to tell it, either by referring to src/cs.c
explicily in the makefile, or by using the VPATH mechanism. Find and
read the GNU make documentation for details.


-- 
Nick Garnett - eCos Kernel Architect
http://www.eCosCentric.com/


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