idn.c:173:20: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
      error (0, 0, _("only one of -s, -e, -d, -a, -u or -n can be specified"));
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:173:20: note: treat the string as an argument to avoid this
      error (0, 0, _("only one of -s, -e, -d, -a, -u or -n can be specified"));
                   ^
                   "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:188:22: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
    fprintf (stderr, _("Type each input string on a line by itself, "
                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:188:22: note: treat the string as an argument to avoid this
    fprintf (stderr, _("Type each input string on a line by itself, "
                     ^
                     "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:200:32: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
          error (EXIT_FAILURE, errno, _("input error"));
                                      ^~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:200:32: note: treat the string as an argument to avoid this
          error (EXIT_FAILURE, errno, _("input error"));
                                      ^
                                      "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:219:8: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                     _("could not convert from UTF-8 to UCS-4"));
                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:219:8: note: treat the string as an argument to avoid this
                     _("could not convert from UTF-8 to UCS-4"));
                     ^
                     "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:244:8: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                     _("could not convert from UTF-8 to UCS-4"));
                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:244:8: note: treat the string as an argument to avoid this
                     _("could not convert from UTF-8 to UCS-4"));
                     ^
                     "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:281:6: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                   _("could not convert from UTF-8 to UCS-4"));
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:281:6: note: treat the string as an argument to avoid this
                   _("could not convert from UTF-8 to UCS-4"));
                   ^
                   "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:340:6: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                   _("could not convert from UCS-4 to UTF-8"));
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:340:6: note: treat the string as an argument to avoid this
                   _("could not convert from UCS-4 to UTF-8"));
                   ^
                   "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:364:6: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                   _("could not convert from UCS-4 to UTF-8"));
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:364:6: note: treat the string as an argument to avoid this
                   _("could not convert from UCS-4 to UTF-8"));
                   ^
                   "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:442:8: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                     _("could not convert from UCS-4 to UTF-8"));
                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:442:8: note: treat the string as an argument to avoid this
                     _("could not convert from UCS-4 to UTF-8"));
                     ^
                     "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:498:6: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                   _("could not convert from UTF-8 to UCS-4"));
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:498:6: note: treat the string as an argument to avoid this
                   _("could not convert from UTF-8 to UCS-4"));
                   ^
                   "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:527:5: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                         _("could not convert from UTF-8 to UCS-4"));
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:527:5: note: treat the string as an argument to avoid this
                         _("could not convert from UTF-8 to UCS-4"));
                         ^
                         "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:540:30: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
            error (EXIT_FAILURE, 0, _("could not do NFKC normalization"));
                                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:540:30: note: treat the string as an argument to avoid this
            error (EXIT_FAILURE, 0, _("could not do NFKC normalization"));
                                    ^
                                    "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
idn.c:551:5: error: format string is not a string literal (potentially insecure) [-Werror,-Wformat-security]
                         _("could not convert from UTF-8 to UCS-4"));
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
idn.c:551:5: note: treat the string as an argument to avoid this
                         _("could not convert from UTF-8 to UCS-4"));
                         ^
                         "%s", 
idn.c:35:19: note: expanded from macro '_'
#define _(String) dgettext (PACKAGE, String)
                  ^
../gl/gettext.h:69:38: note: expanded from macro 'dgettext'
# define dgettext(Domainname, Msgid) ((void) (Domainname), gettext (Msgid))
                                     ^
13 errors generated.
make[3]: *** [idn.o] Error 1
make[2]: *** [all] Error 2
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2