TruffleRuby provides the openssl module but not the native libssl system
library that the module uses. TruffleRuby requires version 1.0.2.
Version 1.1.0 or more recent is incompatible, so you might need to install a
compatibility version of libssl.
apt-get install libssl-dev
We recommend libssl-dev instead of libssl1.0.0, even though we aren't using
it for development because the latter doesn't seem to put the shared library in
a place where we can find it.
On Fedora 25 or older, the default openssl is correct, so you only need to
install openssl-devel:
sudo dnf install openssl-devel
However, on Fedora 26 or more recent, the default openssl is 1.1.0 which is too recent. A workaround is to install the compatibility openssl 1.0.
# Make sure the 1.1.0 headers are not installed as they would conflict
sudo dnf remove openssl-devel
# Install openssl 1.0
sudo dnf install compat-openssl10-devel
We recommend compat-openssl10-devel instead of compat-openssl10, because the
latter doesn't seem to put the shared library in a place where we can find it.
On macOS the system version is too old. We recommend installing via Homebrew.
brew install openssl
If libssl is in a non-standard location for your system, you can use the
option
-Xcexts.remap=libssl.so:path/to/libssl.so