1 files changed, 20 insertions, 0 deletions
diff --git a/tools/include/nolibc/string.h b/tools/include/nolibc/string.h
index febfd6978966..163a17e7dd38 100644
--- a/tools/include/nolibc/string.h
+++ b/tools/include/nolibc/string.h
@@ -293,6 +293,26 @@ char *strrchr(const char *s, int c)
 }
 
 static __attribute__((unused))
+char *strstr(const char *haystack, const char *needle)
+{
+	size_t len_haystack, len_needle;
+
+	len_needle = strlen(needle);
+	if (!len_needle)
+		return NULL;
+
+	len_haystack = strlen(haystack);
+	while (len_haystack >= len_needle) {
+		if (!memcmp(haystack, needle, len_needle))
+			return (char *)haystack;
+		haystack++;
+		len_haystack--;
+	}
+
+	return NULL;
+}
+
+static __attribute__((unused))
 int tolower(int c)
 {
 	if (c >= 'A' && c <= 'Z')