Problems with making HEMI_DEFINE_CONSTANT static on host

[harrism]

#define HEMI_DEFINE_CONSTANT(def, value) __constant__ def ## _devconst = value; static def ## _hostconst = value;

With separate compilation, an extern linkage constant variable defined in one translation unit may be referenced by another translation unit. Forcing the host version of the constant to have internal linkage (“static”) won’t work for this scenario. Also, “static” linkage variables cannot be template arguments, which would break the following code:

__constant__ int XXX = 200;

template <int *addr>
__device__  int getValue(void) { return *addr; }

__global__ void kern(int *ptr) {  *ptr = getValue<&XXX>(); }

The snippet above compiles fine, but changing the linkage of “XXX” to static and recompiling fails:

j1.cu(6): error: a template argument may not reference a non-external entity

Perhaps the macro should have an argument to specify the linkage?

[harrism]

Fixed by cd163b8