[FS#2495] ucert rebuild within SDK segfaults on Debian 10 and Ubuntu 18.04

[OpenWrt Bugs]

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FS#2495 - ucert rebuild within SDK segfaults on Debian 10 and Ubuntu 18.04
User who did this - recycler (recycler)

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Same here for Ubuntu 20.04.2

Seems that downloaded ucert is relying on certain library versions.

ldd ./staging_dir/host/bin/ucert 
        linux-vdso.so.1 (0x00007ffd69dae000)
        libubox.so => /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/staging_dir/host/lib/libubox.so (0x00007f743222b000)
        libblobmsg_json.so => /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/staging_dir/host/lib/libblobmsg_json.so (0x00007f7432226000)
        libc.so.6 => /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/staging_dir/host/lib/libc.so.6 (0x00007f7432065000)
        libjson-c.so.5 => /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/staging_dir/host/lib/libjson-c.so.5 (0x00007f7432052000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f7432245000)


(gdb) run -I -c /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/key-build.ucert -p /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/key-build.pub -s /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/key-build
Starting program: /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/staging_dir/host/bin/ucert -I -c /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/key-build.ucert -p /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/key-build.pub -s /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/key-build

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7e18133 in __libc_start_main () from /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/staging_dir/host/lib/libc.so.6
(gdb) backtrace
#0  0x00007ffff7e18133 in __libc_start_main () from /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/staging_dir/host/lib/libc.so.6
#1  0x0000555555556a7e in _start () at /home/recycler/proj/openwrt/openwrt-sdk-ramips-mt7620_gcc-8.4.0_musl.Linux-x86_64/build_dir/hostpkg/ucert-2020-05-24-00b921d8/ucert.c:625

A solution could be a static binary for download.
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=2495#comment9720

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