[Bug libctf/28545] cross compile incorrectly using host libraries in install relink

[bugs.sourceware at johnthomson dot fastmail.com.au]

https://sourceware.org/bugzilla/show_bug.cgi?id=28545

--- Comment #1 from John <bugs.sourceware at johnthomson dot fastmail.com.au> 
---
Minimum OpenWrt config example:

cat <<EOF>.config
CONFIG_TARGET_ipq40xx=y
CONFIG_TARGET_ipq40xx_mikrotik=y
CONFIG_TARGET_ipq40xx_mikrotik_DEVICE_mikrotik_hap-ac2=y

CONFIG_DEVEL=y
CONFIG_EXPERIMENTAL=y
CONFIG_TESTING_KERNEL=y

CONFIG_PACKAGE_ip-full=y
EOF

make defconfig
make clean
make package/devel/binutils/clean
make package/devel/binutils/compile

# /usr/lib/libiberty.a: error adding symbols: file format not recognized
sudo mv /usr/lib/libiberty.a{,_moved}
# /usr/lib/libz.so: file not recognized: file format not recognized             
sudo mv /usr/lib/libz.so{,_moved}
# /usr/lib/libz.a: error adding symbols: file format not recognized
sudo mv /usr/lib/libz.a{,_moved}
# relink okay


Not seeing this on either an ath79 or ramips mt7621 device build

The ath79 device build still tries these external libraries, but skips for
incompatible:
skipping incompatible /usr/lib/libiberty.a when searching for -liberty
/mnt/pool_ssd/code/openwrt/staging_dir/toolchain-mips_24kc_gcc-11.2.0_musl/lib/gcc/mips-openwrt-linux-musl/11.2.0/../../../../mips-openwrt-linux-musl/bin/ld:
skipping incompatible /usr/lib/libz.so when searching for -lz
/mnt/pool_ssd/code/openwrt/staging_dir/toolchain-mips_24kc_gcc-11.2.0_musl/lib/gcc/mips-openwrt-linux-musl/11.2.0/../../../../mips-openwrt-linux-musl/bin/ld:
skipping incompatible /usr/lib/libz.a when searching for -lz


The previous OpenWrt package binutils version was 2.35.2, and it compiled
without this issue.

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