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#ifdef HAVE_ERR_H
#include_next <err.h>
#else
#ifndef LIBCRYPTOCOMPAT_ERR_H
#define LIBCRYPTOCOMPAT_ERR_H
#define err(exitcode, format, args...) \
errx(exitcode, format ": %s", ## args, strerror(errno))
#define errx(exitcode, format, args...) \
do { warnx(format, ## args); exit(exitcode); } while (0)
#define warn(format, args...) \
warnx(format ": %s", ## args, strerror(errno))
#define warnx(format, args...) \
fprintf(stderr, format "\n", ## args)
#endif
#endif
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