Torfs Tom wrote:
Everyone,I've been trying unsuccessfully to use math library functions such as pow(), expf() etc. with mspgcc (running on Windows). I downloaded the latest version and the problem still exists. I created a minimal example which exhibits the problem: fptest.c: /* minimal program showing math linking problems */ int main(void) { float a,b,c; a = 1.234; b = 5.678; c = pow(a,b); return 0; } compiled with this command: msp430-gcc -g -mmcu=msp430x149 -o2 -lm fptest.c -o fptest.elf Results in the following error: W:\msp430\stack-code>msp430-gcc -g -mmcu=msp430x149 -o2 -lm fptest.c -o fptest.elf /cygdrive/c/DOCUME~1/torfst/LOCALS~1/Temp/ccGrKWzV.o(.text+0x2e): In function `main': /cygdrive/w/msp430/stack-code/fptest.c:9: undefined reference to `pow' I tried adding -lfp as well as -lm, adding a global float variable, ... but it does not make a difference. What am I missing?
Put the -lm after your fptest.c file on the command line ie msp430-gcc -g -mmcu=msp430x149 -o2 fptest.c -lm -o fptest.elf the linker is only one (or two I forget) not three pass. Regards, -- Peter Jansen STS Australian Antarctic Division Channel Highway Kingston TAS 7050 AUSTRALIA Ph (03) 62 323 533 Fax (03) 62 323 351
