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diff --git a/i2c_smbus/i2c_smbus_linux.cpp b/i2c_smbus/i2c_smbus_linux.cpp
index 33d1494b..1c5ff27b 100644
--- a/i2c_smbus/i2c_smbus_linux.cpp
+++ b/i2c_smbus/i2c_smbus_linux.cpp
@@ -14,6 +14,24 @@
#include <sys/ioctl.h>
#include <cstring>
+#ifndef HAVE_CANONICALIZE_FILE_NAME
+#include <limits.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+static char * canonicalize_file_name(const char *path)
+{
+ char buf[PATH_MAX] = { };
+
+ snprintf(buf, sizeof(buf) - 1, "%s", path);
+
+ if (!realpath(path, buf))
+ return NULL;
+
+ return strdup(buf);
+}
+#endif
+
s32 i2c_smbus_linux::i2c_smbus_xfer(u8 addr, char read_write, u8 command, int size, union i2c_smbus_data* data)
{
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