fw_env: fix building w/out a config.h

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>

tools/env/Makefile

@@ -26,7 +26,7 @@ include $(TOPDIR)/config.mk
 HOSTSRCS := $(SRCTREE)/lib/crc32.c  fw_env.c  fw_env_main.c
 HOSTSRCS += $(SRCTREE)/lib/ctype.c $(SRCTREE)/lib/linux_string.c
 HOSTSRCS += $(SRCTREE)/common/env_attr.c $(SRCTREE)/common/env_flags.c
-HEADERS	:= fw_env.h $(OBJTREE)/include/config.h
+HEADERS	:= fw_env.h
 
 # Compile for a hosted environment on the target
 HOSTCPPFLAGS  = -idirafter $(SRCTREE)/include \
@@ -36,6 +36,15 @@ HOSTCPPFLAGS  = -idirafter $(SRCTREE)/include \
 		-DUSE_HOSTCC \
 		-DTEXT_BASE=$(TEXT_BASE)
 
+# Pass CONFIG_xxx settings via the command line so that we can build w/out
+# a config.h file existing in the first place.  Useful for generic builds.
+CONFIG_VARS_TO_PASS = \
+	ENV_OVERWRITE \
+	OVERWRITE_ETHADDR_ONCE \
+	ETHADDR
+HOSTCPPFLAGS += \
+	$(foreach x,$(CONFIG_VARS_TO_PASS),$(if $(CONFIG_$(x)),-DCONFIG_$(x)=$(CONFIG_$(x))))
+
 ifeq ($(MTD_VERSION),old)
 HOSTCPPFLAGS += -DMTD_OLD
 endif

tools/env/fw_env.h

@@ -21,15 +21,6 @@
  * MA 02111-1307 USA
  */
 
-/* Pull in the current config to define the default environment */
-#ifndef __ASSEMBLY__
-#define __ASSEMBLY__ /* get only #defines from config.h */
-#include <config.h>
-#undef	__ASSEMBLY__
-#else
-#include <config.h>
-#endif
-
 /*
  * To build the utility with the static configuration
  * comment out the next line.
@@ -52,22 +43,6 @@
 #define DEVICE2_ENVSECTORS     2
 #endif
 
-#ifndef CONFIG_BAUDRATE
-#define CONFIG_BAUDRATE		115200
-#endif
-
-#ifndef CONFIG_BOOTDELAY
-#define CONFIG_BOOTDELAY	5	/* autoboot after 5 seconds	*/
-#endif
-
-#ifndef CONFIG_BOOTCOMMAND
-#define CONFIG_BOOTCOMMAND							\
-	"bootp; "								\
-	"setenv bootargs root=/dev/nfs nfsroot=${serverip}:${rootpath} "	\
-	"ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}::off; "	\
-	"bootm"
-#endif
-
 extern int   fw_printenv(int argc, char *argv[]);
 extern char *fw_getenv  (char *name);
 extern int fw_setenv  (int argc, char *argv[]);