[PATCH 6/8] net: fix build with CONFIG_SHELL_NONE

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Some common networking code like fastboot over UDP calls ifup_all(0) to
bring up all interfaces. ifup_all(0) in turn runs commands to execute
interface discovery scripts and source network configurations.

This leads to a link error, because run_command is not defined in a
CONFIG_SHELL_NONE build as it lacks CONFIG_COMMAND_SUPPORT.

Fix this by adding inline stubs that fail for run_command and friends.
This way ifup_all(0) will either fail if there is a script that should
be run, but couldn't or just succeed if there are no applicable scripts
anyway.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 include/command.h | 8 ++++++++
 net/Kconfig       | 1 -
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/command.h b/include/command.h
index 9226756cc00b..26e06077b071 100644
--- a/include/command.h
+++ b/include/command.h
@@ -15,6 +15,7 @@
 #include <linux/compiler_types.h>
 #include <linux/stddef.h>
 #include <string.h>
+#include <errno.h>
 
 #ifndef	__ASSEMBLY__
 
@@ -49,10 +50,17 @@ extern struct command * const __barebox_cmd_end[];
 
 
 /* common/command.c */
+#ifdef CONFIG_COMMAND_SUPPORT
 struct command *find_cmd(const char *cmd);
 int execute_command(int argc, char **argv);
 void barebox_cmd_usage(struct command *cmdtp);
 int run_command(const char *cmd);
+#else
+static inline struct command *find_cmd(const char *cmd) { return NULL; }
+static inline int execute_command(int argc, char **argv) { return -ENOSYS; }
+static inline void barebox_cmd_usage(struct command *cmdtp) {}
+static inline int run_command(const char *cmd) { return -ENOSYS; }
+#endif
 
 #define COMMAND_SUCCESS		0
 #define COMMAND_ERROR		1
diff --git a/net/Kconfig b/net/Kconfig
index 07e623670e22..c13ee8bb43d8 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -40,7 +40,6 @@ config NET_RESOLV
 
 config NET_IFUP
 	default y
-	depends on !SHELL_NONE
 	bool
 
 config NET_DHCP
-- 
2.39.2