temporarily enable CURL_CHECK_FUNC_INET_NTOA_R

configure.ac

@@ -2075,6 +2075,7 @@ CURL_CHECK_FUNC_GETHOSTBYNAME_R
 CURL_CHECK_FUNC_GETHOSTNAME
 CURL_CHECK_FUNC_GETSERVBYPORT_R
 CURL_CHECK_FUNC_GMTIME_R
+CURL_CHECK_FUNC_INET_NTOA_R
 CURL_CHECK_FUNC_LOCALTIME_R
 CURL_CHECK_FUNC_SIGACTION
 CURL_CHECK_FUNC_STRCASECMP

m4/curl-functions.m4

@@ -22,7 +22,34 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 20
+# serial 21
+
+
+dnl CURL_INCLUDES_ARPA_INET
+dnl -------------------------------------------------
+dnl Set up variable with list of headers that must be
+dnl included when arpa/inet.h is to be included.
+
+AC_DEFUN([CURL_INCLUDES_ARPA_INET], [
+curl_includes_arpa_inet="\
+/* includes start */
+#ifdef HAVE_SYS_TYPES_H
+#  include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SOCKET_H
+#  include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#  include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#  include <arpa_inet.h>
+#endif
+/* includes end */"
+  AC_CHECK_HEADERS(
+    sys/types.h sys/socket.h netinet/in.h arpa/inet.h,
+    [], [], [$curl_includes_arpa_inet])
+])
 
 
 dnl CURL_INCLUDES_NETDB
@@ -1119,6 +1146,130 @@ AC_DEFUN([CURL_CHECK_FUNC_GMTIME_R], [
 ])
 
 
+dnl CURL_CHECK_FUNC_INET_NTOA_R
+dnl -------------------------------------------------
+dnl Verify if inet_ntoa_r is available, prototyped,
+dnl and can be compiled. If all of these are true, and
+dnl usage has not been previously disallowed with
+dnl shell variable curl_disallow_inet_ntoa_r, then
+dnl HAVE_INET_NTOA_R will be defined.
+
+AC_DEFUN([CURL_CHECK_FUNC_INET_NTOA_R], [
+  AC_REQUIRE([CURL_INCLUDES_ARPA_INET])dnl
+  #
+  tst_links_inet_ntoa_r="unknown"
+  tst_proto_inet_ntoa_r="unknown"
+  tst_compi_inet_ntoa_r="unknown"
+  tst_allow_inet_ntoa_r="unknown"
+  tst_nargs_inet_ntoa_r="unknown"
+  #
+  AC_MSG_CHECKING([if inet_ntoa_r can be linked])
+  AC_LINK_IFELSE([
+    AC_LANG_FUNC_LINK_TRY([inet_ntoa_r])
+  ],[
+    AC_MSG_RESULT([yes])
+    tst_links_inet_ntoa_r="yes"
+  ],[
+    AC_MSG_RESULT([no])
+    tst_links_inet_ntoa_r="no"
+  ])
+  #
+  if test "$tst_links_inet_ntoa_r" = "yes"; then
+    AC_MSG_CHECKING([if inet_ntoa_r is prototyped])
+    AC_EGREP_CPP([inet_ntoa_r],[
+      $curl_includes_arpa_inet
+    ],[
+      AC_MSG_RESULT([yes])
+      tst_proto_inet_ntoa_r="yes"
+    ],[
+      AC_MSG_RESULT([no])
+      tst_proto_inet_ntoa_r="no"
+    ])
+  fi
+  #
+  if test "$tst_proto_inet_ntoa_r" = "yes"; then
+    if test "$tst_nargs_inet_ntoa_r" = "unknown"; then
+      AC_MSG_CHECKING([if inet_ntoa_r takes 2 args.])
+      AC_COMPILE_IFELSE([
+        AC_LANG_PROGRAM([[
+          $curl_includes_arpa_inet
+        ]],[[
+          struct in_addr addr;
+          if(0 != inet_ntoa_r(addr, 0))
+            return 1;
+        ]])
+      ],[
+        AC_MSG_RESULT([yes])
+        tst_compi_inet_ntoa_r="yes"
+        tst_nargs_inet_ntoa_r="2"
+      ],[
+        AC_MSG_RESULT([no])
+        tst_compi_inet_ntoa_r="no"
+      ])
+    fi
+    if test "$tst_nargs_inet_ntoa_r" = "unknown"; then
+      AC_MSG_CHECKING([if inet_ntoa_r takes 3 args.])
+      AC_COMPILE_IFELSE([
+        AC_LANG_PROGRAM([[
+          $curl_includes_arpa_inet
+        ]],[[
+          struct in_addr addr;
+          if(0 != inet_ntoa_r(addr, 0, 0))
+            return 1;
+        ]])
+      ],[
+        AC_MSG_RESULT([yes])
+        tst_compi_inet_ntoa_r="yes"
+        tst_nargs_inet_ntoa_r="3"
+      ],[
+        AC_MSG_RESULT([no])
+        tst_compi_inet_ntoa_r="no"
+      ])
+    fi
+    AC_MSG_CHECKING([if inet_ntoa_r is compilable])
+    if test "$tst_compi_inet_ntoa_r" = "yes"; then
+      AC_MSG_RESULT([yes])
+    else
+      AC_MSG_RESULT([no])
+    fi
+  fi
+  #
+  if test "$tst_compi_inet_ntoa_r" = "yes"; then
+    AC_MSG_CHECKING([if inet_ntoa_r usage allowed])
+    if test "x$curl_disallow_inet_ntoa_r" != "xyes"; then
+      AC_MSG_RESULT([yes])
+      tst_allow_inet_ntoa_r="yes"
+    else
+      AC_MSG_RESULT([no])
+      tst_allow_inet_ntoa_r="no"
+    fi
+  fi
+  #
+  AC_MSG_CHECKING([if inet_ntoa_r might be used])
+  if test "$tst_links_inet_ntoa_r" = "yes" &&
+     test "$tst_proto_inet_ntoa_r" = "yes" &&
+     test "$tst_compi_inet_ntoa_r" = "yes" &&
+     test "$tst_allow_inet_ntoa_r" = "yes"; then
+    AC_MSG_RESULT([yes])
+    AC_DEFINE_UNQUOTED(HAVE_INET_NTOA_R, 1,
+      [Define to 1 if you have the inet_ntoa_r function.])
+    dnl AC_DEFINE_UNQUOTED(INET_NTOA_R_ARGS, $tst_nargs_inet_ntoa_r,
+    dnl   [Specifies the number of arguments to inet_ntoa_r])
+    #
+    if test "$tst_nargs_inet_ntoa_r" -eq "2"; then
+      AC_DEFINE(HAVE_INET_NTOA_R_2, 1, [inet_ntoa_r() takes 2 args])
+    elif test "$tst_nargs_inet_ntoa_r" -eq "3"; then
+      AC_DEFINE(HAVE_INET_NTOA_R_3, 1, [inet_ntoa_r() takes 3 args])
+    fi
+    #
+    ac_cv_func_inet_ntoa_r="yes"
+  else
+    AC_MSG_RESULT([no])
+    ac_cv_func_inet_ntoa_r="no"
+  fi
+])
+
+
 dnl CURL_CHECK_FUNC_LOCALTIME_R
 dnl -------------------------------------------------
 dnl Verify if localtime_r is available, prototyped, can