Recent MinGW provides inet_pton(). There is our inet_pton()
implementation in src/inet.c. Our inet_pton() is declared in
src/inet.h but the declaration causes the following build error:
gcc -O2 -fPIC -c -o src/luasocket.o -IC://msys64/mingw64/include/luajit-2.0 src/luasocket.c -DLUA_COMPAT_APIINTCASTS -DLUASOCKET_DEBUG -DLUASOCKET_INET_PTON -DWINVER=0x0501 -DLUASOCKET_API=__declspec(dllexport) -DMIME_API=__declspec(dllexport)
src/inet.h:46:13: error: conflicting types for 'inet_ntop'
46 | const char *inet_ntop(int af, const void *src, char *dst, socklen_t cnt);
| ^~~~~~~~~
In file included from src/wsocket.h:12,
from src/socket.h:18,
from src/inet.h:18,
from src/luasocket.c:30:
C:/msys64/mingw64/x86_64-w64-mingw32/include/ws2tcpip.h:451:35: note: previous declaration of 'inet_ntop' was
here
451 | WINSOCK_API_LINKAGE LPCSTR WSAAPI InetNtopA(INT Family, LPCVOID pAddr, LPSTR pStringBuf, size_t StringBufSize);
| ^~~~~~~~~
In file included from src/luasocket.c:30:
src/inet.h:47:5: warning: 'inet_pton' redeclared without dllimport attribute: previous dllimport ignored [-Wattributes]
47 | int inet_pton(int af, const char *src, void *dst);
| ^~~~~~~~~
We already know that we don't need our inet_pton() for recent MinGW.
78a1657c7d (#300) removed
-DLUASOCKET_INET_PTON but LUASOCKET_INET_PTON in *.rockspec wasn't
removed.
It causes "luarocks install luasocket" for MinGW causes the above
build error.
Some systems like Mac OS X 10.5 (and lower) do not have EAI_OVERFLOW and
AI_NUMERICSERV defined.
These variables are used to avoid a potentially slow name resolution
for the hostname (which will always be an ip address)
and for service name (which will always be an actual port number).
The code might be slower, but it should still work.
Closes: #242
