configure: move IPv6 feature checks into aclocal

[nfs-utils.git] / aclocal / ipv6.m4

diff --git a/aclocal/ipv6.m4 b/aclocal/ipv6.m4
new file mode 100644 (file)
index 0000000..0564b3e
--- /dev/null
+++ b/aclocal/ipv6.m4
@@ -0,0 +1,29 @@
+dnl Checks for IPv6 support
+dnl
+AC_DEFUN([AC_IPV6], [
+
+  AC_CHECK_DECL([AI_ADDRCONFIG],
+                [AC_DEFINE([HAVE_DECL_AI_ADDRCONFIG], 1,
+                           [Define this to 1 if AI_ADDRCONFIG macro is defined])], ,
+                [ #include <netdb.h> ])
+
+  if test "$enable_ipv6" = yes; then
+
+    dnl TI-RPC required for IPv6
+    if test "$enable_tirpc" = no; then
+      AC_MSG_ERROR(['--enable-ipv6' requires '--enable-tirpc'.])
+    fi
+
+    dnl IPv6-enabled networking functions required for IPv6
+    AC_CHECK_FUNCS([getnameinfo bindresvport_sa], , ,
+                   [AC_MSG_ERROR([Missing functions needed for IPv6.])])
+
+    dnl Need to detect presence of IPv6 networking at run time via
+    dnl getaddrinfo(3); old versions of glibc do not support ADDRCONFIG
+    AC_CHECK_DECL([AI_ADDRCONFIG], ,
+                  [AC_MSG_ERROR([full getaddrinfo(3) implementation needed for IPv6 support])],
+                  [ #include <netdb.h> ])
+
+  fi
+
+])dnl