U_STRCAT 26 maint/gnulib/tests/unistr/test-u16-strcat.c #define U_STRCAT u16_strcat U_STRCAT 26 maint/gnulib/tests/unistr/test-u32-strcat.c #define U_STRCAT u32_strcat U_STRCAT 26 maint/gnulib/tests/unistr/test-u8-strcat.c #define U_STRCAT u8_strcat