[R] make: Nothing to be done for `all'.

[Romain Francois]

Le 12/05/10 00:23, Elizabeth Lawson a écrit :
> Why would I want to remove (rm) the file.  I am trying to compile it.

make thinks : "Why would I compile this file, the result is already there"


First time :

romain at naxos /tmp $ R CMD SHLIB hello.c
gcc-4.2 -arch x86_64 -std=gnu99 
-I/Library/Frameworks/R.framework/Resources/include 
-I/Library/Frameworks/R.framework/Resources/include/x86_64 
-I/usr/local/include    -fPIC  -g -O3 -Wall -pipe -Wno-variadic-macros 
-c hello.c -o hello.o
gcc-4.2 -arch x86_64 -std=gnu99 -dynamiclib 
-Wl,-headerpad_max_install_names -undefined dynamic_lookup 
-single_module -multiply_defined suppress -L/usr/local/lib -o hello.so 
hello.o -F/Library/Frameworks/R.framework/.. -framework R -Wl,-framework 
-Wl,CoreFoundation


Second time:

romain at naxos /tmp $ R CMD SHLIB hello.c
make: Nothing to be done for `all'.


Does that help ?

Romain

BTW, your second post is more useful than the first one as you actually 
partly follow the posting guide and show some example code.


> For the file hello2.c
> /* hello.c: display a message on the screen */
>
> #include<stdio.h>
>
> main()
> {
> 	printf("hello, world\n");
> }
>
> I used gcc hello2.c and it works fine.
>
> But fort eh file hello.c
> #include<R.h>
> void hello(int *n)
> {
> int i;
> for(i=0; i<  *n; i++) {
> Rprintf("Hello, world!\n");
> }
> }
>
>
> I try R CMD SHLIB hello.c and I ge tthe error
> make: Nothing to be done for `all'.
>
> Why does one compile and the other not?


-- 
Romain Francois
Professional R Enthusiast
+33(0) 6 28 91 30 30
http://romainfrancois.blog.free.fr
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