My command line is: msp430-gcc -mmcu=msp430g2553 main.c -o foo.elf -lm
Note -lm needs to be after the .c files to be picked up..
This results in:
/var/folders/_2/jkjmx9g52rld63ptzv1j4w4h0000gn/T//ccUsXLlr.o: In function
`main':
main.c:(.init9+0x14): undefined reference to `log'
collect2: ld returned 1 exit status
If I replace log() with logf() then it links OK. If -lm is omitted in the logs
case a similar error is thrown by the compiler indicating the -lm was picked up
correctly and thus log() should have worked too.
Robert
On Sep 16, 2012, at 4:35 PM, Robert Wessels wrote:
> One of the Energia users stumbled upon what seems to be a bug.
> The following compiles just fine.
>
> #include <msp430.h>
> #include <math.h>
>
> unsigned int foo = 0;
> int main()
> {
> double var = log(1024);
> var++;
> }
>
> This piece of code however gives:
>
> main.o: In function `main':
> /Users/rwessels/tmp/log_bug/main.c:9: undefined reference to `log'
> collect2: ld returned 1 exit status
> make: *** [null.elf] Error 1
>
>
> #include <msp430.h>
> #include <math.h>
>
> unsigned int foo = 0;
> int main()
> {
> double var = log(foo);
> var++;
> }
>
> Seems that log() does not like variables.
>
> Robert
>
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