Cannot Compile Squirrel From Source

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Introduction

Squirrel is a high-performance, embeddable, and lightweight scripting language that is gaining popularity in the game development and scripting communities. However, compiling Squirrel from source can be a challenging task, especially for beginners. In this article, we will explore the common issues that may arise during the compilation process and provide step-by-step solutions to resolve them.

Understanding the Error Messages

The error messages you provided are quite lengthy and complex. However, we can break them down into several key points:

  • The errors are related to the limits header file in the C++ standard library.
  • The errors are caused by the type macro in the sqobject.h file, which is trying to access the _type member of an object.
  • The errors are occurring because the type macro is being expanded to a non-structure or union type, which is causing the compiler to fail.

Troubleshooting Steps

To resolve these issues, we will need to modify the sqobject.h file to correctly handle the type macro. Here are the steps to follow:

Step 1: Modify the sqobject.h File

Open the sqobject.h file and locate the type macro definition. Change the definition to the following:

#define type(obj) ((obj).type)

This will correctly access the type member of the object.

Step 2: Update the limits Header File

The limits header file is trying to access the type macro, which is causing the errors. We need to update the limits header file to correctly handle the type macro. Open the limits header file and locate the following lines:

static _LIBCPP_CONSTEXPR type min() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type max() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type lowest() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type epsilon() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type round_error() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type denorm_min() _NOEXCEPT { return type(); }

Change these lines to the following:

static _LIBCPP_CONSTEXPR type min() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type max() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type lowest() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type epsilon() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type round_error() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type denorm_min() _NOEXCEPT { return type(0); }

This will correctly handle the type macro and resolve the errors.

Step 3: Rebuild the Squirrel Project

After modifying the sqobject.h and limits header files, rebuild the Squirrel project using the following command:

make clean
make

This will rebuild the Squirrel project with the updated header files.

Conclusion

Compiling Squirrel from source can be a challenging task, but with the right troubleshooting steps, you can resolve common issues and successfully build the project. In this article, we explored the common errors that may arise during the compilation process and provided step-by-step solutions to resolve them. By following these steps, you can modify the sqobject.h and limits header files to correctly handle the type macro and resolve the errors.

Additional Tips

  • Make sure to update the sqobject.h and limits header files to the latest versions.
  • Use a consistent coding style throughout the project.
  • Use a version control system, such as Git, to track changes to the project.
  • Use a build system, such as CMake, to manage the build process.

Introduction

Compiling Squirrel from source can be a challenging task, especially for beginners. In our previous article, we explored the common issues that may arise during the compilation process and provided step-by-step solutions to resolve them. In this article, we will answer some frequently asked questions (FAQs) related to Squirrel compilation issues.

Q: What are the common issues that may arise during Squirrel compilation?

A: The common issues that may arise during Squirrel compilation include:

  • Errors related to the limits header file in the C++ standard library.
  • Errors caused by the type macro in the sqobject.h file, which is trying to access the _type member of an object.
  • Errors occurring because the type macro is being expanded to a non-structure or union type.

Q: How can I resolve the errors related to the limits header file?

A: To resolve the errors related to the limits header file, you need to update the limits header file to correctly handle the type macro. You can do this by changing the following lines:

static _LIBCPP_CONSTEXPR type min() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type max() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type lowest() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type epsilon() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type round_error() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT { return type(); }
static _LIBCPP_CONSTEXPR type denorm_min() _NOEXCEPT { return type(); }

to the following:

static _LIBCPP_CONSTEXPR type min() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type max() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type lowest() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type epsilon() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type round_error() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type infinity() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type quiet_NaN() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type signaling_NaN() _NOEXCEPT { return type(0); }
static _LIBCPP_CONSTEXPR type denorm_min() _NOEXCEPT { return type(0); }

Q: How can I resolve the errors caused by the type macro in the sqobject.h file?

A: To resolve the errors caused by the type macro in the sqobject.h file, you need to modify the type macro definition to the following:

#define type(obj) ((obj).type)

This will correctly access the type member of the object.

Q: What are some additional tips to ensure successful Squirrel compilation?

A: Here are some additional tips to ensure successful Squirrel compilation:

  • Make sure to update the sqobject.h and limits header files to the latest versions.
  • Use a consistent coding style throughout the project.
  • Use a version control system, such as Git, to track changes to the project.
  • Use a build system, such as CMake, to manage the build process.

Q: Can I use a different build system instead of CMake?

A: Yes, you can use a different build system instead of CMake. However, CMake is a popular and widely-used build system that is well-suited for Squirrel compilation. If you choose to use a different build system, make sure to configure it correctly to handle the Squirrel project.

Q: How can I get help if I encounter further compilation issues?

A: If you encounter further compilation issues, you can try the following:

  • Check the Squirrel documentation and online resources for troubleshooting guides and FAQs.
  • Search online forums and communities for similar issues and solutions.
  • Reach out to the Squirrel community or developers for assistance.
  • Consider seeking help from a professional developer or consultant.

By following these tips and FAQs, you can ensure successful Squirrel compilation and take advantage of the benefits of this powerful scripting language.