tmux installation on Mac OSX Catalina

install_tmux.sh

#!/bin/sh

## setup _________________________________

TMUX_VER=3.3a
LIBEVENT_VER=2.1.12-stable
OPENSSL_VER=1_1_1v
TEMP_COMPILE=~/tmux-temp-compile
COMMON_INSTALL_PREFIX=/opt
SYMLINK=/usr/local/bin/tmux

## _______________________________________

echo
echo ">>> Creating and using temporary dir ${TEMP_COMPILE} for downloading and compiling libevent and tmux ..."
echo

mkdir ${TEMP_COMPILE}
cd ${TEMP_COMPILE}

echo
echo ">>> Downloading the releases ..."
echo

curl -OL https://github.com/tmux/tmux/releases/download/${TMUX_VER}/tmux-${TMUX_VER}.tar.gz
curl -OL https://github.com/libevent/libevent/releases/download/release-${LIBEVENT_VER}/libevent-${LIBEVENT_VER}.tar.gz
curl -OL https://github.com/openssl/openssl/archive/OpenSSL_${OPENSSL_VER}.tar.gz

echo
echo ">>> Extracting tmux ${TMUX_VER}, libevent ${LIBEVENT_VER}, and openssl ${OPENSSL_VER}..."
echo

tar xzf tmux-${TMUX_VER}.tar.gz
tar xzf libevent-${LIBEVENT_VER}.tar.gz
tar xzf OpenSSL_${OPENSSL_VER}.tar.gz

echo
echo ">>> Compiling openssl ..."
echo

cd openssl-OpenSSL_${OPENSSL_VER}
./config --prefix=${COMMON_INSTALL_PREFIX}
make
make test
# Only install libs & includes
sudo make install_dev

echo
echo ">>> Compiling libevent ..."
echo

cd ../libevent-${LIBEVENT_VER}
PKG_CONFIG_PATH=${COMMON_INSTALL_PREFIX}/lib/pkgconfig LDFLAGS="-L${COMMON_INSTALL_PREFIX}/lib" CPPFLAGS="-I${COMMON_INSTALL_PREFIX}/include" ./configure --prefix=${COMMON_INSTALL_PREFIX} OPENSSL_CFLAGS=-I/opt/include OPENSSL_LIBS="-L/opt/lib -lssl -lcrypto"
sudo make
sudo make install

echo
echo ">>> Compiling tmux ..."
echo

cd ../tmux-${TMUX_VER}
LDFLAGS="-L${COMMON_INSTALL_PREFIX}/lib" CPPFLAGS="-I${COMMON_INSTALL_PREFIX}/include" LIBS="-lresolv" ./configure --prefix=${COMMON_INSTALL_PREFIX} --disable-utf8proc
make
echo
echo ">>> Installing tmux in ${COMMON_INSTALL_PREFIX}/bin ..."
echo

sudo make install

echo
echo ">>> Symlink to it from ${SYMLINK} ..."
sudo rm ${SYMLINK}
sudo ln -s ${COMMON_INSTALL_PREFIX}/bin/tmux ${SYMLINK}

echo
echo ">>> Cleaning up by removing the temporary dir ${TEMP_COMPILE} ..."
echo

cd ..
sudo rm -rf ${TEMP_COMPILE}