Defined in 3 files as a macro:
- external/gpl2/gettext/dist/gettext-runtime/gnulib-lib/strnlen1.h, line 19 (as a macro)
- external/gpl2/xcvs/dist/lib/strnlen1.h, line 20 (as a macro)
- external/gpl3/gdb/dist/gdb/gnulib/import/strnlen1.h, line 18 (as a macro)