env: Make environment variable support optional

Environment variables are only useful in interactive environments.
Make it optional on our way to support a noninteractive barebox.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/environment.h b/include/environment.h
index 21a7ffa0e2..1f22fcb812 100644
--- a/include/environment.h
+++ b/include/environment.h
@@ -44,8 +44,20 @@ struct env_context *get_current_context(void);
 char *var_val(struct variable_d *);
 char *var_name(struct variable_d *);
 
+#ifdef CONFIG_ENVIRONMENT_VARIABLES
 const char *getenv(const char *);
 int setenv(const char *, const char *);
+#else
+static inline char *getenv(const char *var)
+{
+	return NULL;
+}
+
+static inline int setenv(const char *var, const char *val)
+{
+	return 0;
+}
+#endif
 
 int env_pop_context(void);
 int env_push_context(void);