commit 76ca86a506a81d8a08655fb331162926569a47d6
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date:   Thu Nov 20 21:24:22 2014 +0530

    Remove last place for definition of IS_IN_* macros
    
    Ignoring IS_IN_build, which has a different purpose altogether, this
    patch removes the last bit of IS_IN_* macro definitions.  Now barring
    NOT_IN_libc, all cases use the IN_MODULE scheme.
    
    Generated code unchanged on x86_64.
    
    	* extra-lib.mk (CPPFLAGS-$(lib)): Remove IS_IN_$(lib).

Index: glibc-2.17-c758a686/extra-lib.mk
===================================================================
--- glibc-2.17-c758a686.orig/extra-lib.mk
+++ glibc-2.17-c758a686/extra-lib.mk
@@ -101,4 +101,4 @@ ifneq (,$(cpp-srcs-left))
 include $(patsubst %,$(..)cppflags-iterator.mk,$(cpp-srcs-left))
 endif
 
-CPPFLAGS-$(lib) := -DNOT_IN_libc=1 -DIS_IN_$(lib)=1
+CPPFLAGS-$(lib) := -DNOT_IN_libc=1