package: add green end sftp server

For sftp support in Dropbear or as an alternative for the built in
sftp support in openssh (or to use standalone).

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/gesftpserver/Config.in

@@ -0,0 +1,16 @@
+config BR2_PACKAGE_GESFTPSERVER
+	bool "gesftpserver"
+	select BR2_PACKAGE_LIBICONV if !BR2_ENABLE_LOCALE
+	depends on BR2_USE_WCHAR
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	help
+	  Green End SFTP Server
+
+	  This is an SFTP server supporting up to protocol version 6.
+	  It is possible to use it as a drop-in replacement for the
+	  OpenSSH server, or to provide sftp support for Dropbear.
+
+	  http://www.greenend.org.uk/rjk/sftpserver/
+
+comment "gesftpserver requires a toolchain with WCHAR and threads support"
+	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS

package/gesftpserver/gesftpserver.mk

@@ -0,0 +1,27 @@
+#############################################################
+#
+# gesftpserver
+#
+#############################################################
+
+GESFTPSERVER_VERSION = 0.1
+GESFTPSERVER_SOURCE = sftpserver-$(GESFTPSERVER_VERSION).tar.gz
+GESFTPSERVER_SITE = http://www.greenend.org.uk/rjk/sftpserver/
+GESFTPSERVER_LICENSE = GPLv2+
+GESFTPSERVER_LICENSE_FILES = COPYING
+# forgets to link against pthread when cross compiling
+GESFTPSERVER_CONF_ENV = LIBS=-lpthread
+
+# overwrite openssh version if enabled
+GESFTPSERVER_DEPENDENCIES += \
+	$(if $(BR2_ENABLE_LOCALE),,libiconv) \
+	$(if $(BR2_PACKAGE_OPENSSH),openssh)
+
+# openssh/dropbear looks here
+define GESFTPSERVER_ADD_SYMLINK
+	ln -sf gesftpserver $(TARGET_DIR)/usr/libexec/sftp-server
+endef
+
+GESFTPSERVER_POST_INSTALL_TARGET_HOOKS += GESFTPSERVER_ADD_SYMLINK
+
+$(eval $(autotools-package))