--- gcc-5.5.0.old/gcc/cppdefault.c
+++ gcc-5.5.0/gcc/cppdefault.c
@@ -59,8 +59,12 @@
     /* This is the dir for gcc's private headers.  */
     { GCC_INCLUDE_DIR, "GCC", 0, 0, 0, 0 },
 #endif
+    { "__META_SYSTREE__/include"            , 0, 0, 1, 1, 0 } ,
+    { "__META_SYSTREE__/pkg/syslib/include" , 0, 0, 1, 1, 0 } ,
+    { "__META_SYSTREE__/pkg/glibc/include"  , 0, 0, 1, 1, 0 } ,
+    { "__META_SYSTREE__/pkg/musl/include"   , 0, 0, 1, 1, 0 } ,
+    { "__META_SYSTREE__/toolchain/include"  , 0, 0, 1, 1, 0 } ,
 #ifdef LOCAL_INCLUDE_DIR
-    /* /usr/local/include comes before the fixincluded header files.  */
     { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 },
     { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
 #endif