1 files changed, 14 insertions, 0 deletions
diff --git a/firmware/libc/strcat.c b/firmware/libc/strcat.c
new file mode 100644
index 0000000000..221529519c
--- /dev/null
+++ b/firmware/libc/strcat.c
@@ -0,0 +1,14 @@
+#include <string.h>
+
+char *strcat(char *s1,
+             const char *s2)
+{
+  char *s = s1;
+
+  while (*s1)
+    s1++;
+
+  while ((*s1++ = *s2++))
+    ;
+  return s;
+}