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#include <stdio.h> typedef struct { int (*f)(void *); void *d; char s[16]; } LMEXFunctionStruct; int f(void *user) { return 0; } static LMEXFunctionStruct const a[] = {{f, (void *)(int)'a', "aa"}}; int main() { printf("ok\n"); return a[0].f(a[0].d); }