Blame m4/xiph_net.m4

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# XIPH_NET
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# Perform tests required by the net module
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AC_DEFUN([XIPH_NET],
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[dnl
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AC_REQUIRE([XIPH_TYPE_SOCKLEN_T])
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AC_REQUIRE([XIPH_FUNC_VA_COPY])
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AC_CHECK_HEADERS([sys/select.h sys/uio.h])
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AC_CHECK_HEADER([winsock2.h],
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  [AC_DEFINE([HAVE_WINSOCK2_H], [1], [Define if you have winsock2.h on MINGW])
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   LIBS="$LIBS -lwsock32"])
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# These tests are ordered based on solaris 8 tests
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AC_SEARCH_LIBS([sethostent], [nsl],
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  [AC_DEFINE([HAVE_SETHOSTENT], [1],
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    [Define if you have the sethostent function])])
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AC_SEARCH_LIBS([getnameinfo], [socket],
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  [AC_DEFINE([HAVE_GETNAMEINFO], [1],
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    [Define if you have the getnameinfo function])])
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AC_CHECK_FUNCS([endhostent getaddrinfo inet_aton writev])
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# Irix defines INET_PTON but not sockaddr_storage!
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AC_CHECK_MEMBERS([struct sockaddr_storage.ss_family],
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  [AC_CHECK_FUNCS([inet_pton])],,
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  [#include <sys/types.h> 
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#include <sys/socket.h>])
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])