HelenOS sources

NAN                95 uspace/lib/c/include/math.h #define NAN        __builtin_nan("")
NAN               117 uspace/lib/c/include/math.h #define NAN        (0.0 / 0.0)
NAN                95 uspace/lib/posix/include/libc/math.h #define NAN        __builtin_nan("")
NAN               117 uspace/lib/posix/include/libc/math.h #define NAN        (0.0 / 0.0)
HelenOS homepage, sources at GitHub