Developing Ethereum on Debian-based Linux: Overcoming db_cxx.h Errors
As a developer working on Ethereum projects, building and maintaining a blockchain can be a daunting task. A common problem that many developers face is encountering errors related to missing header files, specifically db_cxx.h. In this article, we will delve into the causes of these errors and provide guidance on how to overcome them when building Ethereum on Debian-based Linux.
Why am I getting the error “No such file or directory”?
The error message “headers.h:36:20: fatal error: db_cxx.h: No such file or directory” indicates that the compiler cannot find the db_cxx.h header file. This file is part of the Ethereum C++ libraries, which are used by the Ethereum development team. To resolve this issue, you need to make sure that the required dependencies are installed on your system.
Installing Required Packages
To build and run Ethereum on Debian-based Linux, you will need to install several packages:
libdb4(PostgreSQL database library)
dbcpp(C++ wrapper for PostgreSQL database)
libssl-dev(for SSL/TLS encryption)
You can install these packages using your package manager:
sudo apt-get install libdb4-dev dbcpp
Overcoming Missing Header File Errors
To resolve the error, you need to make sure that the required dependencies are installed and configured correctly. Here is a step-by-step guide:
- Reinstalllibdb4
: If you have multiple versions oflibdb4
installed, try reinstalling it using:
sudo apt-get remove libdb4-*
- Install dbcpp
manually: Download and compile thedbcpppackage from the official website: < Follow the installation instructions to installdbcpp.
- Update compiler settings: Make sure the compiler is correctly configured to use the C++ wrapper for the PostgreSQL database. You can do this by adding the following compiler command flags:
-std=c++11 -Wall -Wextra -g -I/usr/include/postgresql/10 -L/usr/lib/postgresql/10 -ldbc
Replace /usr/include/postgresql/10and/usr/lib/postgresql/10with the actual paths on your system.
- Rebuild Ethereum: After updating the compiler settings, rebuildEthereum
using:
clean && make
This should resolve any issues related to missing header files.
Troubleshooting
If you are having trouble rebuilding Ethereum or running tests, please verify the following:
- Your system is up to date with the latest packages.
- The libdb4
anddbcpp` dependencies are installed correctly.
- You have updated the compiler settings as per the instructions above.
- You have rebuilt "Ethereum" using the correct commands.
By following these steps, you should be able to resolve the error "headers.h:36:20: fatal error: db_cxx.h: No such file or directory" and successfully build and run Ethereum on your Debian-based Linux system.
