tce-load -i compiletc libgpg-error-dev

wget https://gnupg.org/ftp/gcrypt/libksba/libksba-1.4.0.tar.bz2

cd libksba-1.4.0

CC="gcc -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" CXX="g++ -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --localstatedir=/var --disable-static

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;

make [0m 37.29s]
sudo make install

        Libksba v1.4.0 has been configured as follows:

        Revision:  f30f604  (62223)
        Platform:  aarch64-unknown-linux-gnu