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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<tr><td><span title='2022-09-04 23:10:10 +0200'>2022-09-04</span></td><td><a href='/guix/commit/tests/guix-describe.sh?id=9e59dbcd6cc37ee65236edf23a9b32338536e036'>guix describe: Adjust test to latest changes.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 64a070717c3de32332201df5d6d2d52a7f99dce9.

* tests/guix-describe.sh: Add trailing slash when checking URL.
</span></span></td><td>Ludovic Courtès</td></tr>