I cannot make sqrt() work on my SAM9:

#include <math.h>

// this is working
x = sqrt(10.1);

// none of these are
float a = 10.1;
int b = 10;
x = sqrt(a);
y = sqrt(b);

Similarly pow(x,2) works, but not pow(x,0.5), and it should!
It seems like sqrt and other functions are not defined in the math.h of the atsam toolchain.. but it's weird..

Ideas?

Please define "is not working"

# gcc mathtest.c -omathtest /lib/libm.so.0
# ./mathtest
3.178050
3.178050 3.162278
# cat mathtest.c
#include <stdio.h>

#include <math.h>

int main(int argc, char **argv)
{
float x, y;

// this is working

x = sqrt(10.1);

printf("%f\n", x);

// none of these are

float a = 10.1;

int b = 10;

x = sqrt(a);

y = sqrt(b);

printf("%f %f\n", x, y);
}
# gcc -v
Using built-in specs.
Target: arm-unknown-linux-uclibcgnueabi
Configured with: /home/ct/buildroot-2011.05/output/toolchain/gcc-4.3.5/configure
--prefix=/usr --build=x86_64-unknown-linux-gnu --host=arm-unknown-linux-uclibcg
nueabi --target=arm-unknown-linux-uclibcgnueabi --enable-languages=c,c++ --with-
gxx-include-dir=/usr/include/c++ --disable-__cxa_atexit --enable-target-optspace
--disable-libgomp --with-gnu-ld --disable-libssp --disable-multilib --disable-t
ls --disable-shared --disable-nls --enable-threads --disable-decimal-float --wit
h-float=soft --with-abi=aapcs-linux --with-arch=armv5te --with-tune=arm926ej-s -
-with-pkgversion='Buildroot 2011.05' --with-bugurl=http://bugs.buildroot.net/
Thread model: posix
gcc version 4.3.5 (Buildroot 2011.05)

# gcc powtest.c -opowtest /lib/libm.so.0
# ./powtest
151.290005
3.507136
# cat powtest.c
#include <stdio.h>
#include <math.h>

int main(int argc, char **argv)
{
float x = 12.3;
printf("%f\n", pow(x,2));
printf("%f\n", pow(x,0.5));
}

I get:
undefined reference to 'sqrt'

I work with CodeBlocks, I compile my code on my Ubuntu 11.10 laptop using the at91sam toolchain (and then I would move the executable file to the board to run it).
I use:
--sysroot=/home/ste/stuffOE/tmp/sysroots/armv5te-angstrom-linux-gnueabi/
in "Other options" in Codeblocks to set the toolchain to use. Then of course I use that toolchain (this is the only issue I have with programming on this board, all other complex programs in C works perfectly so the toolchain is ok I assume).

>>I get: undefined reference to 'sqrt'

Like this :

# gcc mathtest.c
/tmp/ccWlmasl.o: In function `main':
mathtest.c:(.text+0x60): undefined reference to `sqrt'
mathtest.c:(.text+0x98): undefined reference to `sqrt'
collect2: ld returned 1 exit status

You have failed to link in the math library containing the functions you want.