netsniff-ng/netsniff-ng — pull request #109 by morfoh (2014-04-10 12:38:00+00:00)
Title: built_in.h: improved to define DEFFILEMODE if not provided by the libc

musl libc doesn't provide the non-standard macros for common mode bit masks, which other libc implementations like glibc define in .

Compile time error when building against musl libc
```
netsniff-ng.c: In function 'read_pcap':
netsniff-ng.c:592:33: error: 'DEFFILEMODE' undeclared (first use in this function)
```

This change improves built_in.h to check if DEFFILEMODE is defined and if not it defines it to be available internally.