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auto-str.c:17: warning: return type of 'main' is not 'int'
./load auto-str substdio.a error.a str.a
substdio.a(substdo.o): In function `allwrite':
substdo.c:(.text+0x3b): undefined reference to `errno'
collect2: ld returned 1 exit status
make: *** [auto-str] Error 1