pshahani wrote:
Hi,
I am new to msp430-gcc. I am working on the msp430f148 microcontroller, and
I have installed BSL on fedora 2
I want to find the square root of a number, and I have written the following
code:
#include <msp430x14x.h>
#include <math.h>
int main(void)
{
float number = 16.0;
float root;
root = sqrt(number);
return 0;
}
However, this does not work and gives me the following error:
msp430-gcc -mmcu=msp430x148 -o elf_file -O main.c
/tmp/ccIhjeE2.o: In function `main':
main.c:(.text+0x112): undefined reference to `sqrt'
make: *** [elf_file] Error 1
you need to link against the math library. The -l option tells gcc
which libraries to link in. -lm should do the trick (is sqrt fn for
floats is in the lib...)
I have tried converting float to double, but it still does not work.
Someone please help out asap. I need to fix this bug at the earliest. Also,
I am new to msp430-gcc, so please provide step by step solutions.
Thanks
Parikshit
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