[PATCH v3 1/2] m4: checking if ssh_get_server_publickey() exists.

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This commit adds some checks inside libssh m4 checking to verify if
ssh_get_server_publickey is available. This new function scope replaces
the old ssh_get_publickey() from libssh 0.7.5 and below. Assuming that
some distros are not showing the right version of libssh. This is a
simple way to check which function is available.

Signed-off-by: Julio Faracco <jcfaracco@xxxxxxxxx>
---
 m4/virt-libssh.m4 | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/m4/virt-libssh.m4 b/m4/virt-libssh.m4
index 7e39277e10..01c3b75c72 100644
--- a/m4/virt-libssh.m4
+++ b/m4/virt-libssh.m4
@@ -23,6 +23,19 @@ AC_DEFUN([LIBVIRT_ARG_LIBSSH],[
 
 AC_DEFUN([LIBVIRT_CHECK_LIBSSH],[
   LIBVIRT_CHECK_PKG([LIBSSH], [libssh], [0.7])
+
+  if test "$with_libssh" = "yes" ; then
+    old_CFLAGS="$CFLAGS"
+    old_LIBS="$LIBS"
+    CFLAGS="$CFLAGS $LIBSSH_CFLAGS"
+    LIBS="$LIBS $LIBSSH_LIBS"
+    AC_CHECK_FUNC([ssh_get_server_publickey],
+      [],
+      [AC_DEFINE_UNQUOTED([ssh_get_server_publickey], [ssh_get_publickey],
+            [ssh_get_publickey is deprecated and replaced by ssh_get_server_publickey.])])
+    CFLAGS="$old_CFLAGS"
+    LIBS="$old_LIBS"
+  fi
 ])
 
 AC_DEFUN([LIBVIRT_RESULT_LIBSSH],[
-- 
2.17.0

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