I'm using nios2-linux-20100621.tar with my 3C120 Dev Board (ghrd.sof) and my statically compiled application is getting a segfault when I use the atan2 function in the math library from the binary mm toolchain.root:/tmp> ./atan2_test 0 1 y = 0.000000 x = 1.000000 fabs (0.000000 / 1.000000) = 0.000000 atan (0.000000 / 1.000000) = 0.000000 atan (fabs(0.000000 / 1.000000)) = 0.000000 atan2 (0.000000, 1.000000) = 0.000000 root:/tmp> ./atan2_test 1 -1 y = 1.000000 x = -1.000000 fabs (1.000000 / -1.000000) = 1.000000 atan (1.000000 / -1.000000) = -0.785398 atan (fabs(1.000000 / -1.000000)) = 0.785398 SEGV Although the atan function seems to work, it appears that the atan2 function dies trying to call it. We've also had memory leaks with printf when using %d or %f format specifiers. To get past this, I've been reading all the threads about the mmu toolchain and it does not appear that anyone has ever successfully recompiled the mmu toolchain. Is this the case? I've seen a few notes that a common toolchain is coming but they were old (2009?). Can anyone help point me to a resource on how to rebuild the mmu toolchain?