Qianqian Fang <fangqq@xxxxxxxxx> writes: > I was trying to compile a simulation code on > multiple platforms. It involves a thread-safe > 48bit POSIX random number generator (RNG), > drand48_r/seed48_r. I tried gcc 4.4 on Ubuntu > 10.4 and it compiled fine. However, when > I run gcc 4.0 on Mac OS X, it gave me error: > > posix_randr.h:29: error: array type has incomplete element type > > and the offending lines read like: > > typedef struct drand48_data RandType; > __device__ float rand_uniform01(RandType t[RAND_BUF_LEN]); > ... > > Similar error when compiling on Windows with > MinGW gcc 3.4. > > Because drand48 is supposed to be a POSIX function, > I am a bit surprised when seeing multiple platforms > responded differently. Did I miss anything? or > this is the correct behavior? As far as I know drand48 is not in POSIX. It's in the SVID and it's in X/Open, but I don't think it's in POSIX proper. And as far as I know drand48_r is just a GNU extension to drand48. But it's certainly possible that POSIX picked this up somewhere. In any case, this sounds like a bug, but it sounds like a library bug; it doesn't sound like a compiler bug. Ian
