############################################################################

#

# OpenSSL dual versions

#

# Works with CentOS 7

#

############################################################################

#

# Add in alternative OpenSSL support into /opt/openssl. /opt/openssl is

# chosen instead of the default of /usr/local so that existing utilities

# continue to use the original version of OpenSSL and so only specific

# applications that requires the newer version of OpenSSL will pick up the

# new code.

#

# Download latest stable version of openssl.X.Y.Z.tar.gz from

# https://www.openssl.org/source/

tar zxovf openssl.X.Y.Z.tar.gz

cd openssl.X.Y.X

./config --prefix=/opt/openssl --openssldir=/opt/openssl

make

sudo make install_sw

# The following should not clash the existing OpenSSL lib*.so.1.0 usage unless

# the previous OpenSSL version is 1.1.0 or later.

# It just makes things for running executables a lot simpler.

sudo cp /opt/openssl/lib/lib*.so.1.1 /lib64

cd ..

############################################################################

#

# libcoap build with updated OpenSSL

#

############################################################################

# Get the latest libcoap

git clone https://github.com/obgm/libcoap.git

# Build code

cd libcoap

./autogen.sh

# Update --enable- / --disable- options as appropriate

# libcoap libraries are put into /usr/lib64 for ease of linking

PKG_CONFIG_PATH=/opt/openssl/lib/pkgconfig ./configure --libdir=/usr/lib64 \

--with-openssl --enable-tests --enable-examples --disable-doxygen \

--disable-manpages

make

sudo make install

cd ..