env: allow people to force envcrc building
For people who want to manually extract the embedded environment so that
it can be manually packed into the final u-boot image, add a config opt
to force building of the envcrc tool.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/README b/README
index 2cad44d..cb08816 100644
--- a/README
+++ b/README
@@ -2563,6 +2563,11 @@
of environment data (variable area); in general, we support the
following configurations:
+- CONFIG_BUILD_ENVCRC:
+
+ Builds up envcrc with the target environment so that external utils
+ may easily extract it and embed it in final U-Boot images.
+
- CONFIG_ENV_IS_IN_FLASH:
Define this if the environment is in flash memory.
diff --git a/common/env_embedded.c b/common/env_embedded.c
index ae6cac4..e438575 100644
--- a/common/env_embedded.c
+++ b/common/env_embedded.c
@@ -44,7 +44,7 @@
* Generate embedded environment table
* inside U-Boot image, if needed.
*/
-#if defined(ENV_IS_EMBEDDED)
+#if defined(ENV_IS_EMBEDDED) || defined(CONFIG_BUILD_ENVCRC)
/*
* Only put the environment in it's own section when we are building
* U-Boot proper. The host based program "tools/envcrc" does not need
diff --git a/include/common.h b/include/common.h
index 2c779ed..3113580 100644
--- a/include/common.h
+++ b/include/common.h
@@ -761,4 +761,9 @@
#define ALIGN(x,a) __ALIGN_MASK((x),(typeof(x))(a)-1)
#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
+/* Pull in stuff for the build system */
+#ifdef DO_DEPS_ONLY
+# include <environment.h>
+#endif
+
#endif /* __COMMON_H_ */
diff --git a/tools/envcrc.c b/tools/envcrc.c
index c8c50d7..feebbab 100644
--- a/tools/envcrc.c
+++ b/tools/envcrc.c
@@ -60,6 +60,10 @@
# endif
#endif /* CONFIG_ENV_IS_IN_FLASH */
+#if defined(ENV_IS_EMBEDDED) && !defined(CONFIG_BUILD_ENVCRC)
+# define CONFIG_BUILD_ENVCRC 1
+#endif
+
#ifdef CONFIG_SYS_REDUNDAND_ENVIRONMENT
# define ENV_HEADER_SIZE (sizeof(uint32_t) + 1)
#else
@@ -71,14 +75,14 @@
extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int);
-#ifdef ENV_IS_EMBEDDED
+#ifdef CONFIG_BUILD_ENVCRC
extern unsigned int env_size;
extern unsigned char environment;
-#endif /* ENV_IS_EMBEDDED */
+#endif /* CONFIG_BUILD_ENVCRC */
int main (int argc, char **argv)
{
-#ifdef ENV_IS_EMBEDDED
+#ifdef CONFIG_BUILD_ENVCRC
unsigned char pad = 0x00;
uint32_t crc;
unsigned char *envptr = &environment,