1 files changed, 3 insertions, 0 deletions
diff --git a/tcc.h b/tcc.h
index 686b3c5..c3c1031 100644
--- a/tcc.h
+++ b/tcc.h
@@ -150,6 +150,9 @@ typedef int BOOL;
   #endif
 #endif
 #define CONFIG_TCC_CRT_PREFIX CONFIG_SYSROOT "/usr" CONFIG_TCC_LDDIR
+#ifndef CONFIG_TCC_INCSUBDIR
+  #define CONFIG_TCC_INCSUBDIR ""
+#endif
 
 #define INCLUDE_STACK_SIZE  32
 #define IFDEF_STACK_SIZE    64