tiny-printf: Support assert()

At present assert() is not supported with tiny-printf, so when DEBUG is
enabled a build error is generated for each assert().

Add an __assert_fail() function to correct this. It prints a message and
then hangs.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/lib/tiny-printf.c b/lib/tiny-printf.c
index b334f053cc0ee2645aa3669701f0ec22419bb572..1aa43aba44b5b2428033638574f49e76058f80bc 100644 (file)
--- a/lib/tiny-printf.c
+++ b/lib/tiny-printf.c
@@ -185,3 +185,12 @@ int snprintf(char *buf, size_t size, const char *fmt, ...)
 
        return ret;
 }
+
+void __assert_fail(const char *assertion, const char *file, unsigned line,
+                  const char *function)
+{
+       /* This will not return */
+       printf("%s:%u: %s: Assertion `%s' failed.", file, line, function,
+              assertion);
+       hang();
+}