This patch allows libc to be used with the heavily-patched kernel found
on CentOS 6, which identifies itself as 2.6.32.

See <https://lists.gnu.org/archive/html/guix-devel/2018-02/msg00392.html>.

Patch taken from Nixpkgs.

diff --git a/sysdeps/unix/sysv/linux/configure b/sysdeps/unix/sysv/linux/configure
index cace758c01..38fe7fe0b0 100644
--- a/sysdeps/unix/sysv/linux/configure
+++ b/sysdeps/unix/sysv/linux/configure
@@ -69,7 +69,7 @@ fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for kernel header at least $minimum_kernel" >&5
 $as_echo_n "checking for kernel header at least $minimum_kernel... " >&6; }
 decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
-abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
+abinum=`echo "2.6.32.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <linux/version.h>
diff --git a/sysdeps/unix/sysv/linux/configure.ac b/sysdeps/unix/sysv/linux/configure.ac
index 13abda0a51..6abc12eaed 100644
--- a/sysdeps/unix/sysv/linux/configure.ac
+++ b/sysdeps/unix/sysv/linux/configure.ac
@@ -50,7 +50,7 @@ fi
 AC_MSG_CHECKING(for kernel header at least $minimum_kernel)
 changequote(,)dnl
 decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
-abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
+abinum=`echo "2.6.32.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
 changequote([,])dnl
 AC_TRY_COMPILE([#include <linux/version.h>
 #if LINUX_VERSION_CODE < $decnum
diff --git a/sysdeps/unix/sysv/linux/dl-osinfo.h b/sysdeps/unix/sysv/linux/dl-osinfo.h
index 823cd8224d..482caaeeec 100644
--- a/sysdeps/unix/sysv/linux/dl-osinfo.h
+++ b/sysdeps/unix/sysv/linux/dl-osinfo.h
@@ -39,7 +39,7 @@
 	  GLRO(dl_osversion) = version;					      \
 									      \
 	/* Now we can test with the required version.  */		      \
-	if (__LINUX_KERNEL_VERSION > 0 && version < __LINUX_KERNEL_VERSION)   \
+	if (__LINUX_KERNEL_VERSION > 0 && version < __LINUX_KERNEL_VERSION && version != 0x020620)   \
 	  /* Not sufficent.  */						      \
 	  FATAL ("FATAL: kernel too old\n");				      \
       }									      \
864dba82e14895afbe841091091366c96bc'>bootloaders.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/bootloaders.scm?id=fcc39864dba82e14895afbe841091091366c96bc&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-04-11 01:00:57 -0700'>2021-04-11</span></td><td><a href='/guix/commit/gnu/packages/bootloaders.scm?id=98067662f645cab1c22a51d6b9ed6b3140ecaf9e'>gnu: u-boot: Update to 2021.04.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/bootloaders (u-boot): Update to 2021.04.
  [source]: Use https URL.
</span></span></td><td>Vagrant Cascadian</td></tr>
<tr><td><span title='2021-03-11 00:46:01 +0100'>2021-03-11</span></td><td><a href='/guix/commit/gnu/packages/bootloaders.scm?id=6900105334c3dce5c8ccee716b0da767b5c9acc6'>gnu: os-prober: Update to 1.78.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/bootloaders.scm (os-prober): Update to 1.78.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>