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dnl Copyright (C) 2008-2023 Free Software Foundation, Inc. |
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dnl This file is free software; the Free Software Foundation |
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dnl gives unlimited permission to copy and/or distribute it, |
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dnl with or without modifications, as long as this notice is preserved. |
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dnl gl_SOCKETLIB |
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dnl Determines the library to use for socket functions. |
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dnl Sets and AC_SUBSTs LIBSOCKET. |
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AC_DEFUN([gl_SOCKETLIB], |
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[ |
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gl_PREREQ_SYS_H_WINSOCK2 dnl for HAVE_WINSOCK2_H |
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LIBSOCKET= |
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if test $HAVE_WINSOCK2_H = 1; then |
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dnl Native Windows API (not Cygwin). |
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dnl If the function WSAStartup exists (declared in <winsock2.h> and |
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dnl defined through -lws2_32), we need to call it. |
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AC_CACHE_CHECK([for WSAStartup], |
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[gl_cv_func_wsastartup], [ |
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gl_save_LIBS="$LIBS" |
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LIBS="$LIBS -lws2_32" |
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AC_LINK_IFELSE( |
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[AC_LANG_PROGRAM([[ |
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WORD wVersionRequested = MAKEWORD(1, 1); |
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WSADATA wsaData; |
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int err = WSAStartup(wVersionRequested, &wsaData); |
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WSACleanup (); |
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]]) |
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], |
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[gl_cv_func_wsastartup=yes], |
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[gl_cv_func_wsastartup=no]) |
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LIBS="$gl_save_LIBS" |
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]) |
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if test "$gl_cv_func_wsastartup" = "yes"; then |
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AC_DEFINE([WINDOWS_SOCKETS], [1], [Define if WSAStartup is needed.]) |
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LIBSOCKET='-lws2_32' |
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fi |
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else |
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dnl Unix API. |
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dnl Solaris has most socket functions in libsocket. |
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dnl Haiku has most socket functions in libnetwork. |
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dnl BeOS has most socket functions in libnet. |
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dnl On HP-UX, do NOT link with libxnet, because in 64-bit mode this would |
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dnl break code (e.g. in libraries) that invokes accept(), getpeername(), |
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dnl getsockname(), getsockopt(), or recvfrom() with a 32-bit addrlen. See |
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dnl "man xopen_networking" for details. |
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AC_CACHE_CHECK([for library containing setsockopt], [gl_cv_lib_socket], [ |
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gl_cv_lib_socket= |
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern |
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"C" |
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char setsockopt();]], [[setsockopt();]])], |
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[], |
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[gl_save_LIBS="$LIBS" |
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LIBS="$gl_save_LIBS -lsocket" |
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern |
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"C" |
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char setsockopt();]], [[setsockopt();]])], |
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[gl_cv_lib_socket="-lsocket"]) |
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if test -z "$gl_cv_lib_socket"; then |
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LIBS="$gl_save_LIBS -lnetwork" |
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern |
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"C" |
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char setsockopt();]], [[setsockopt();]])], |
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[gl_cv_lib_socket="-lnetwork"]) |
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if test -z "$gl_cv_lib_socket"; then |
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LIBS="$gl_save_LIBS -lnet" |
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AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern |
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"C" |
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char setsockopt();]], [[setsockopt();]])], |
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[gl_cv_lib_socket="-lnet"]) |
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fi |
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fi |
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LIBS="$gl_save_LIBS" |
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]) |
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if test -z "$gl_cv_lib_socket"; then |
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gl_cv_lib_socket="none needed" |
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fi |
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]) |
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if test "$gl_cv_lib_socket" != "none needed"; then |
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LIBSOCKET="$gl_cv_lib_socket" |
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fi |
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fi |
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AC_SUBST([LIBSOCKET]) |
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]) |
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