Copied from Debian.

2017-06-14  Florian Weimer  <fweimer@redhat.com>

	* sysdeps/i386/i686/multiarch/strcspn-c.c: Add IS_IN (libc) guard.
	* sysdeps/i386/i686/multiarch/varshift.c: Likewise.

--- a/sysdeps/i386/i686/multiarch/strcspn-c.c
+++ b/sysdeps/i386/i686/multiarch/strcspn-c.c
@@ -1,2 +1,4 @@
-#define __strcspn_sse2 __strcspn_ia32
-#include <sysdeps/x86_64/multiarch/strcspn-c.c>
+#if IS_IN (libc)
+# define __strcspn_sse2 __strcspn_ia32
+# include <sysdeps/x86_64/multiarch/strcspn-c.c>
+#endif
--- a/sysdeps/i386/i686/multiarch/varshift.c
+++ b/sysdeps/i386/i686/multiarch/varshift.c
@@ -1 +1,3 @@
-#include <sysdeps/x86_64/multiarch/varshift.c>
+#if IS_IN (libc)
+# include <sysdeps/x86_64/multiarch/varshift.c>
+#endif
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<tr><td><span title='2018-03-16 22:44:36 +0100'>2018-03-16</span></td><td><a href='/guix/commit/gnu/packages/ada.scm?id=593681f613816a046ea3c0dd17b11d72bb8275ec'>gnu: Add python2-libadalang.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>
<tr><td><span title='2018-03-13 20:53:18 +0100'>2018-03-13</span></td><td><a href='/guix/commit/gnu/packages/ada.scm?id=ebd43a2a45f9ac0ce702ef5810eddafd0830db5f'>gnu: Add python2-langkit.</a><span class='msg-avail'>...</span></td><td>Danny Milosavljevic</td></tr>