Ethereum: Building on Ubuntu 16, missing SSL during ./configure

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Building Ethereum on Ubuntu 16: Troubleshooting SSL Configuration Issues

When trying to compile Bitcoin on Ubuntu 16 with bitcoind, you may encounter a frustrating error message about SSL not being enabled during the ./configure process. This issue can have several causes and requires some troubleshooting steps.

Step 1: Reviewing Your Build Environment

Before you start looking for solutions, make sure your environment is set up correctly. Here are a few key points to verify:

• Make sure you have installed all your dependencies: Make sure all required packages (e.g. Boost, OpenSSL) are present and up to date.

• Check your Ubuntu 16 version: Check that your Ubuntu 16 system matches the version specified in the installation guide or online documentation.

Step 2: Checking your SSL configuration

The ./configure process attempts to connect to the Bitcoin network. If SSL (Secure Sockets Layer) is not enabled, there may be problems communicating between the client and the server. Here are some possible causes:

• Missing --with-ssl flag: When compiling bitcoind, you must include the --with-ssl flag to enable SSL support.

• Incorrect OpenSSL installation: Make sure OpenSSL is installed on your system and has the necessary configuration files.

Solution: Enabling SSL support

To resolve this issue:

• Update package list

  : Run the following command to update the package list:

sudo apt update

• Install required packages: Install the libssl-dev library, which is required for OpenSSL:

sudo apt install libssl-dev

• Run ./configure with SSL support: After updating and installing the necessary packages, try running ./configure again with the --with-ssl flag:

./configure --with-ssl

Step 3: Verify the build process

Once SSL support is enabled, verify that the build process was successful. To test, you can follow these steps:

• Build bitcoind: Run the following command to build Bitcoin using ./configure with SSL support:

sudo ./configure --with-ssl and make -j

• Check for errors: Make sure that no error messages are displayed during the build process.

Additional troubleshooting steps

If none of the above steps help resolve the issue, you may need to do the following:

• Manually specify OpenSSL configuration files: When executing the ./configure command, make sure that the --prefix option is used to point to the directory containing the OpenSSL installation files.

• Upgrade Bitcoin version or use a different build process: If your system is running an older version of bitcoind, consider upgrading it using a newer distribution. Alternatively, you can try using a different build process, such as the one provided in the Bitcoind source code.

By following these steps and troubleshooting tips, you should be able to resolve the SSL configuration issue during the ./configure process when compiling Bitcoins on Ubuntu 16.

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