This patch was copied from Debian.  It is needed on armhf.

--- a/build/make/configure.sh	2013-12-17 18:18:46.904410454 +0100
+++ b/build/make/configure.sh	2013-12-17 18:19:58.720758736 +0100
@@ -799,7 +799,6 @@
 
         case ${tgt_cc} in
         gcc)
-            CROSS=${CROSS:-arm-none-linux-gnueabi-}
             link_with_cc=gcc
             setup_gnu_toolchain
             arch_int=${tgt_isa##armv}
@@ -822,10 +821,6 @@
                     check_add_cflags -mfpu=neon #-ftree-vectorize
                     check_add_asflags -mfpu=neon
                 fi
-
-                if [ -z "${tune_cpu}" ]; then
-                    tune_cpu=cortex-a8
-                fi
             else
                 check_add_cflags -march=${tgt_isa}
                 check_add_asflags -march=${tgt_isa}
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<tr><td><span title='2015-02-24 23:43:03 +0100'>2015-02-24</span></td><td><a href='/guix/commit/gnu/packages/libffcall.scm?id=4cc78cb38f5e88a2608aa3d52dede71958a04cd2'>gnu: Sync GNU synopses and descriptions.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-02-04 04:31:40 -0500'>2015-02-04</span></td><td><a href='/guix/commit/gnu/packages/libffcall.scm?id=6a070700df00e8248cb397af44ee76e83a164df6'>gnu: libffcall: Correct license field.</a><span class='msg-avail'>...</span></td><td>Mark H Weaver</td></tr>
<tr><td><span title='2015-02-04 01:51:21 -0500'>2015-02-04</span></td><td><a href='/guix/commit/gnu/packages/libffcall.scm?id=f5844fde7d3a2f3f4c502488788f5431e41979ad'>gnu: Add libffcall.</a><span class='msg-avail'>...</span></td><td>Mark H Weaver</td></tr>