[PATCH v2 14/16] stdio: stub out basprintf and friends when built for PBL

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

To optimize out calls to undefined functions in PBL at compile-time
instead of link time, let's define stubs for the functions that
are referenced in obj-pbl-y files, but inside function sections
that are ultimately unreferenced.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 include/stdio.h | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/include/stdio.h b/include/stdio.h
index 4edadf5c16be..03cd3d281890 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -17,12 +17,32 @@ int sprintf(char *buf, const char *fmt, ...) __attribute__ ((format(__printf__,
 int snprintf(char *buf, size_t size, const char *fmt, ...) __attribute__ ((format(__printf__, 3, 4)));
 int scnprintf(char *buf, size_t size, const char *fmt, ...) __attribute__ ((format(__printf__, 3, 4)));
 int vsprintf(char *buf, const char *fmt, va_list args);
+int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
+int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
+
+#if IN_PROPER || defined(CONFIG_PBL_CONSOLE)
 char *basprintf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2)));
 int asprintf(char **strp, const char *fmt, ...)  __attribute__ ((format(__printf__, 2, 3)));
 char *bvasprintf(const char *fmt, va_list ap);
 int vasprintf(char **strp, const char *fmt, va_list ap);
-int vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
-int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
+#else
+static inline char *basprintf(const char *fmt, ...)
+{
+	return NULL;
+}
+static inline int asprintf(char **strp, const char *fmt, ...)
+{
+	return -ENOMEM;
+}
+static inline char *bvasprintf(const char *fmt, va_list ap)
+{
+	return NULL;
+}
+static inline int vasprintf(char **strp, const char *fmt, va_list ap)
+{
+	return -ENOMEM;
+}
+#endif
 
 #ifdef CONFIG_ARCH_HAS_CTRLC
 int arch_ctrlc(void);
-- 
2.39.5