Error during configuration: C compiler cannot create executables (Concorde TSP)

ONLINECAST

2 min read

·

05-10-2024

8

0

Share

"C compiler cannot create executables" - Troubleshooting Concorde TSP Installation

The error message "C compiler cannot create executables" during Concorde TSP configuration can be frustrating, especially for those new to compiling software. This article will break down the issue, provide solutions, and guide you through resolving this common problem.

Understanding the Problem

Concorde TSP is a powerful tool for solving the Traveling Salesperson Problem (TSP). However, it's not a standalone application. It requires a C compiler to transform its source code into an executable program. This error message indicates that your system cannot correctly build the necessary executable files.

Scenario and Code

Let's say you're attempting to install Concorde TSP on a Linux system. During the configuration process, you encounter the error:

checking for C compiler... gcc -o conftest conftest.c
cc1: error: unrecognized command line option ‘-o’
configure: error: C compiler cannot create executables.

Common Causes and Solutions

This error usually stems from one of the following:

1. Missing or Incorrect Compiler: The most likely cause is that your system lacks a working C compiler like GCC (GNU Compiler Collection).

   • Solution: Install the GCC compiler. For example, on Debian/Ubuntu systems, use the command: sudo apt-get install build-essential

2. Path Issues: Even if you have a compiler, it may not be accessible from the configure script.

   • Solution: Verify that the compiler is in your PATH environment variable. You can check by typing which gcc in your terminal. If it returns a path, you're good. If not, you may need to adjust your system's PATH settings.

3. Incorrect Compiler Flags: The configure script might be using incorrect compiler flags that are not recognized by your specific compiler version.

   • Solution: Try setting the CC environment variable to explicitly point to the compiler path and providing any necessary flags. For example: CC=gcc CFLAGS=-O2 ./configure

Troubleshooting Steps

1. Verify Compiler Installation: Use the gcc -v command to confirm that GCC is installed and the version information is displayed.

2. Check PATH Variable: Use the echo $PATH command to list the directories in your PATH variable. Ensure the directory containing your C compiler is present.

3. Run the Configuration with Explicit Compiler: If you still encounter problems, try running the configure script with the CC variable set. For example: CC=gcc ./configure.

Additional Tips

• Read the Documentation: Refer to the Concorde TSP installation documentation for specific system requirements and installation instructions.
• Consult Online Resources: Search online forums and Q&A sites for similar error messages and solutions.
• Consider Using a Virtual Machine: If you encounter persistent issues, consider setting up a virtual machine with a known working Linux distribution to run Concorde TSP.

Conclusion

The "C compiler cannot create executables" error is a common obstacle during Concorde TSP installation. By understanding the underlying causes and applying the troubleshooting steps outlined above, you can overcome this issue and successfully install this powerful TSP solver. Remember to verify your compiler installation, check your PATH variable, and consider using explicit compiler settings if needed. By taking a systematic approach, you'll be able to efficiently debug and resolve this error.