The firmware is cross-compiled, but the build system ends up using
'objcopy' instead of 'xtensa-elf-objcopy' by default.  Force it to
use the right one.

--- source/target_firmware/configure	2014-10-28 20:57:26.834436561 +0100
+++ source/target_firmware/configure	2014-10-28 20:57:29.666436530 +0100
@@ -11,6 +11,7 @@ mkdir -p build
 cat > "$TOOLCHAIN_FILE" <<EOF
 INCLUDE(CMakeForceCompiler)
 
+SET(CMAKE_OBJCOPY xtensa-elf-objcopy)
 SET(CMAKE_SYSTEM_PROCESSOR xtensa)
 SET(CMAKE_FIND_ROOT_PATH ${TOOLCHAIN}/$TARGET)
 SET(CMAKE_STRIP :)
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<div class='path'>path: <a href='/guix/log/?id=d87252e633598e3cc456268e7c95ba91b2fb0d84&amp;showmsg=1'>root</a>/<a href='/guix/log/gnu?id=d87252e633598e3cc456268e7c95ba91b2fb0d84&amp;showmsg=1'>gnu</a>/<a href='/guix/log/gnu/artwork.scm?id=d87252e633598e3cc456268e7c95ba91b2fb0d84&amp;showmsg=1'>artwork.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/artwork.scm?id=d87252e633598e3cc456268e7c95ba91b2fb0d84'>Collapse</a>)</th><th class='left'>Author</th></tr>
<tr class='logheader'><td><span title='2019-06-10 23:11:07 +0200'>2019-06-10</span></td><td class='logsubject'><a href='/guix/commit/gnu/artwork.scm?id=226a3605d6cabeb71247a732a99d625c9cfafa74'>artwork: Update snapshot to 2f2fe74.</a></td><td>Diego Nicola Barbato</td></tr>
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* gnu/artwork.scm (%artwork-repository): Update to 2f2fe74.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;


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<tr class='logheader'><td><span title='2019-03-05 23:08:53 +0100'>2019-03-05</span></td><td class='logsubject'><a href='/guix/commit/gnu/artwork.scm?id=5387971a9ecf511e1dbbac992af3808437e58d56'>artwork: Update snapshot to b975164.</a></td><td>Ludovic Courtès</td></tr>
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* gnu/artwork.scm (%artwork-repository): Update to b975164.


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<tr class='logheader'><td><span title='2019-02-10 23:25:01 +0100'>2019-02-10</span></td><td class='logsubject'><a href='/guix/commit/gnu/artwork.scm?id=5e6a5aeebd7b735e5d5f2eed496cc1c7e8a5b4c9'>artwork: Update snapshot to e951905.</a></td><td>Ludovic Courtès</td></tr>
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* gnu/artwork.scm (%artwork-repository): Update to e951905.


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<tr class='logheader'><td><span title='2018-11-05 00:08:47 +0100'>2018-11-05</span></td><td class='logsubject'><a href='/guix/commit/gnu/artwork.scm?id=688d1a01e45eb1277a6337987bfd53f3fe3caaec'>artwork: Clone over HTTPS.</a></td><td>Ludovic Courtès</td></tr>
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Suggested by Leo Famulari &lt;leo@famulari.name&gt;
at &lt;https://lists.gnu.org/archive/html/help-guix/2018-11/msg00039.html&gt;.

* gnu/artwork.scm (%artwork-repository): Switch to HTTPS URL.


</td></tr>