diff -Nur gcc-6.3.0.orig/libgcc/config/ia64/fde-glibc.c gcc-6.3.0/libgcc/config/ia64/fde-glibc.c
--- gcc-6.3.0.orig/libgcc/config/ia64/fde-glibc.c	2016-01-04 15:30:50.000000000 +0100
+++ gcc-6.3.0/libgcc/config/ia64/fde-glibc.c	2017-03-05 13:07:33.316600613 +0100
@@ -25,6 +25,8 @@
 /* Locate the FDE entry for a given address, using glibc ld.so routines
    to avoid register/deregister calls at DSO load/unload.  */
 
+#ifndef inhibit_libc
+
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE 1
 #endif
@@ -159,3 +161,4 @@
 
   return data.ret;
 }
+#endif