Use GCC compiler in Termux? I don't like the default C compiler clang provided by Termux. Is there a way I can get GNU GCC in my Termux environment?
Another way to get gcc would be to add the community repo hosted by its-pointless at https://github.com/its-pointless/its-pointless.github.io. Sources are (more or less) available at https://github.com/its-pointless/gcc_termux. 

Other popular packages available includes numpy and scipy. 

More information about this and other community repositories can be found in the termux wiki.

To add this particular repository to your termux environment, run: 

# Get some needed tools. coreutils for mkdir command, gnugp for the signing key, and apt-transport-https to actually connect to the repo
apt-get update
apt-get  --assume-yes upgrade 
apt-get  --assume-yes install coreutils gnupg2 apt-transport-https wget 
# Make the sources.list.d directory
mkdir $PREFIX/etc/apt/sources.list.d
# Write the needed source file - Added Missing "&gt; character on line below
echo "deb [trusted=yes] https://its-pointless.github.io/files/ termux extras" &gt; $PREFIX/etc/apt/sources.list.d/pointless.list
# Download signing key from https://its-pointless.github.io/pointless.gpg 
wget https://its-pointless.github.io/pointless.gpg
apt-key add pointless.gpg
# Update apt
apt update


(instructions taken from https://github.com/its-pointless/its-pointless.github.io/blob/master/setup-pointless-repo.sh)