__STDC_CONSTANT_MACROS   24 gnulib-tests/test-inttypes.c #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
__STDC_CONSTANT_MACROS   27 gnulib-tests/test-stdint.c #define __STDC_CONSTANT_MACROS 1 /* likewise */