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view gcc/testsuite/c-c++-common/pr58346-1.c @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
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/* PR c/58346 */ /* { dg-do compile } */ /* { dg-options "-Wno-c++-compat" { target c } } */ struct U { #ifdef __cplusplus char a[0]; #endif }; static struct U b[6]; static struct U *u1, *u2; int foo (struct U *p, struct U *q) { return q - p; /* { dg-error "arithmetic on pointer to an empty aggregate" } */ } void bar (void) { __PTRDIFF_TYPE__ d = u1 - u2; /* { dg-error "arithmetic on pointer to an empty aggregate" } */ __asm volatile ("" : "+g" (d)); foo (&b[0], &b[4]); }