middle-end: check explicitly for external or constants when checking for loop invaria...

[official-gcc.git] / gcc / testsuite / gcc.dg / cpp / warn-unused-macros.c

// { dg-do preprocess }
// { dg-options "-std=gnu99 -fdiagnostics-show-option -Wunused-macros" }

#define X X  // { dg-warning "9:macro \"X\" is not used .-Wunused-macros." }