llvm-project/clang/test/Sema/transparent-union-pointer.c

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// RUN: clang %s -fsyntax-only -verify
typedef union {
union wait *__uptr;
int *__iptr;
} __WAIT_STATUS __attribute__ ((__transparent_union__));
extern int wait (__WAIT_STATUS __stat_loc);
void fastcgi_cleanup() {
int status = 0;
wait(&status);
}