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-rw-r--r--m4/servent.m451
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diff --git a/m4/servent.m4 b/m4/servent.m4
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+# servent.m4 serial 3
+dnl Copyright (C) 2008, 2010-2020 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_SERVENT],
+[
+ dnl Where are getservent(), setservent(), endservent(), getservbyname(),
+ dnl getservbyport() defined?
+ dnl Where are getprotoent(), setprotoent(), endprotoent(), getprotobyname(),
+ dnl getprotobynumber() defined?
+ dnl - On Solaris < 11.4, they are in libsocket. Ignore libxnet.
+ dnl - On Haiku, they are in libnetwork.
+ dnl - On BeOS, they are in libnet.
+ dnl - On native Windows, they are in ws2_32.dll.
+ dnl - Otherwise they are in libc.
+ AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
+ SERVENT_LIB=
+ gl_saved_libs="$LIBS"
+ AC_SEARCH_LIBS([getservbyname], [socket network net],
+ [if test "$ac_cv_search_getservbyname" != "none required"; then
+ SERVENT_LIB="$ac_cv_search_getservbyname"
+ fi])
+ LIBS="$gl_saved_libs"
+ if test -z "$SERVENT_LIB"; then
+ AC_CHECK_FUNCS([getservbyname], , [
+ AC_CACHE_CHECK([for getservbyname in winsock2.h and -lws2_32],
+ [gl_cv_w32_getservbyname],
+ [gl_cv_w32_getservbyname=no
+ gl_save_LIBS="$LIBS"
+ LIBS="$LIBS -lws2_32"
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+#ifdef HAVE_WINSOCK2_H
+#include <winsock2.h>
+#endif
+#include <stddef.h>
+ ]],
+ [[getservbyname(NULL,NULL);]])],
+ [gl_cv_w32_getservbyname=yes])
+ LIBS="$gl_save_LIBS"
+ ])
+ if test "$gl_cv_w32_getservbyname" = "yes"; then
+ SERVENT_LIB="-lws2_32"
+ fi
+ ])
+ fi
+ AC_SUBST([SERVENT_LIB])
+])