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fix musl - expose gethostbyaddr with _GNU_SOURCE #163

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fix musl - expose gethostbyaddr with _GNU_SOURCE #163

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@PPN-SD PPN-SD commented Jul 4, 2025

tcpdchk.c:72:25: error: call to undeclared function 'gethostbyaddr'; ISO C99 and later do not support implicit function declarations
[-Wimplicit-function-declaration]
72 | if ((host = gethostbyaddr((char*)&addr_in->sin_addr,
| ^

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fix musl - expose gethostbyaddr with _GNU_SOURCE
b3214e5 
>tcpdchk.c:72:25: error: call to undeclared function 'gethostbyaddr'; ISO C99 and later do not support implicit function declarations
>      [-Wimplicit-function-declaration]
>   72 |             if ((host = gethostbyaddr((char*)&addr_in->sin_addr,
>      |                         ^

Signed-off-by: Nicolas PARLANT <[email protected]>
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