build gnutls for ffmpeg 4.4

build-gnutls-static-library.sh

echo "install uncompress utils"
sudo apt install xz-utils lzip

echo "download source codes"
wget -c https://www.gnupg.org/ftp/gcrypt/gnutls/v3.6/gnutls-3.6.16.tar.xz -O - | tar -xJ
wget -c https://ftp.gnu.org/gnu/nettle/nettle-3.4.1.tar.gz -O - | tar -xz
wget -c https://gmplib.org/download/gmp/gmp-6.2.1.tar.lz -O - | tar --lzip -x
wget -c http://ftp.gnu.org/gnu/libtasn1/libtasn1-4.9.tar.gz -O - | tar -xz
wget -c https://ftp.gnu.org/gnu/libunistring/libunistring-0.9.10.tar.xz -O - | tar -xJ
wget -c https://github.com/libffi/libffi/archive/refs/tags/v3.0.9.tar.gz -O - | tar -xz

echo "start to build gmp"
cd gmp-6.2.1 && ./configure --prefix=/usr --enable-static && make -j$(nproc) && make install && cd -

echo "start to build nettle"
cd nettle-3.4.1 && ./configure --prefix=/usr --enable-static && make -j$(nproc) && make install && cd -

echo "start to build libtasn1"
cd libtasn1-4.9 && ./configure --prefix=/usr --enable-static && make -j$(nproc) && make install && cd -

echo "start to build libunistring"
cd libunistring-0.9.10 && ./configure --prefix=/usr --enable-static && make -j$(nproc) && make install && cd -

echo "start to build libffi"
cd libffi-3.0.9 && ./configure --prefix=/usr --enable-static && make -j$(nproc) && make install && cd -

echo "install gettext"
apt-get -y install gettext

echo "start to build gnutls"
cd gnutls-3.6.16 && ./configure --prefix=/usr --enable-static --without-p11-kit && make -j$(nproc) && make install && cd -