tce-load -i compiletc cmake gobject-introspection-dev icu-dev perl5

https://github.com/libical/libical/releases/download/v3.0.8/libical-3.0.8.tar.gz

cd libical-3.0.8

mkdir build
cd build

cmake -LAH -DCMAKE_C_FLAGS_RELEASE="-march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe" -DCMAKE_CXX_FLAGS_RELEASE="-march=armv6zk -mtune=arm1176jzf-s -mfpu=vfp -Os -pipe" -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=TRUE -DSHARED_ONLY=yes -DICAL_BUILD_DOCS=false -DGOBJECT_INTROSPECTION=true ../

make [2m 53.83s]
sudo make install