gcc/testsuite/c-c++-common/Wpadded.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wpadded" } */
   3
   4 /*
   5  * The struct is on single line, because C++ compiler emits the -Wpadded
   6  * warning at the first line of the struct definition, while the C compiler at
   7  * the last line. This way the test passes on both.
   8  *
   9  * Attribute aligned is needed for the test to pass on targets where
  10  * the default behaviour is to pack the struct and also on targets that align
  11  * 4 byte fields to 2 byte boundary.
  12  */
  13 struct S { __UINT32_TYPE__ i; char c; } __attribute__((aligned(4))); /* { dg-warning "padding struct size to alignment boundary with 3 bytes" } */
  14