Look carefully in math.h, there may be an #ifdef around the double math functions. I "thought" that the telosb used doubles rather than floats (the ATMEGA uses float math) but it sounds like I'm wrong... MS
ys...@lifc.univ-fcomte.fr wrote: > Hi Manjunath, > > Yes it compiled, thanks a lot. And I'll check if the result is correct. > Still don't know why sqrt function is declared in math.h but unusable. > > Maybe it's declared but not implemented. Anyway I really appreciate your > help. > > Best regards. > >> Hi, >> >> Can you please try sqrtf() ? >> >> Manjunath D >> >> ################################################################################################################ >> *************************************************************************************************************** >> >> On Wed, 16 Nov 2011, ys...@lifc.univ-fcomte.fr wrote: >> >>> Hello, >>> >>> I'm working with telosb mote, and I need to use sqrt function in my >>> program, but I can't compile it. >>> >>> =========================================== >>> mkdir -p build/telosb >>> compiling TestMulAppC to a telosb binary >>> ncc -o build/telosb/main.exe -Os -O -mdisable-hwmul -Wall -Wshadow >>> -Wnesc-all -target=telosb -fnesc-cfile=build/telosb/app.c -board= >>> -DDEFINED_TOS_AM_GROUP=0x22 -DIDENT_APPNAME=\"TestMulAppC\" >>> -DIDENT_USERNAME=\"xubuntos\" -DIDENT_HOSTNAME=\"xubuntos-tinyos\" >>> -DIDENT_USERHASH=0x00f95284L -DIDENT_TIMESTAMP=0x4ec2f4a5L >>> -DIDENT_UIDHASH=0xb186c6f2L TestMulAppC.nc -lm <---- LM here >>> !!!!!!!!!!!! >>> TestMulC.nc: In function `TestMulC$Boot$booted': >>> TestMulC.nc:22: warning: unused variable `m' >>> /tmp/ccIJqAuN.o: In function `EllipticCurveP$mtIsPrime': >>> app.c:(.text+0x6c0): undefined reference to `sqrt' >>> make: *** [exe0] Error 1 >>> =========================================== >>> >>> I have included math.h in my program, and I've noticed that the -lm >>> switch >>> is turned on, and I have even found the function declaration at ligne 62 >>> in file /usr/msp430/include/math.h >>> >>> =========================================== >>> extern double sqrt _PARAMS((double)); >>> =========================================== >>> >>> I don't understand why it cannot find sqrt function. >>> >>> So can anyone help me out? >>> >>> Best regards >>> >>> -- >>> Yanbo SHOU >>> Ph.D student Cartoon Team >>> Computer Science Laboratory of Franche-Comté >>> Office 420C >>> 16 route de Gray >>> 25 000 Besançon, France >>> >>> _______________________________________________ >>> Tinyos-help mailing list >>> Tinyos-help@millennium.berkeley.edu >>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >>> > > _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
