Скачать или смотреть Resolving wxStrcoll Not Found Error in wxWidgets and MSVS 2019

Discover how to fix the `wxStrcoll not found` error when building wxWidgets projects in MSVS 2019, including a workaround for version 3.0.5 and recommendations for upgrades.
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Resolving wxStrcoll Not Found Error in wxWidgets and MSVS 2019

If you're a developer working with wxWidgets in MS Visual Studio 2019, you might encounter the frustrating wxStrcoll not found error. This problem can arise when you follow standard setup procedures to create a simple "Hello World" application. In this guide, we'll discuss the issue in detail and show you how to resolve it.

Understanding the Problem

When you try to build a new 32-bit project in MSVS 2019 with wxWidgets version 3.0.5, you may see an error message similar to this:

[[See Video to Reveal this Text or Code Snippet]]

This issue occurs because the necessary declaration for wxStrcoll has been omitted in the wxWidgets library configuration for this specific version. Despite following the setup guidelines:

Setting the wxwin environment variable

Creating a new 32-bit empty project

Copying the "Hello World" application into your project

Configuring includes and preprocessor definitions

Unfortunately, the build still fails.

Step-by-Step Solution

To resolve the wxStrcoll not found error, you will need to make a manual modification in the wxWidgets header file. Follow these steps:

1. Locate the wxCRT Header File

Navigate to the wxWidgets include directory where the wxcrt.h file is located. The common path usually looks like this:

[[See Video to Reveal this Text or Code Snippet]]

2. Modify the Header File

Open the wxcrt.h file in a text editor. Look for the following conditional check within the file:

[[See Video to Reveal this Text or Code Snippet]]

3. Remove the Condition

You need to remove the defined(__VISUALC__) || part of this conditional check. The modified line should only contain the subsequent checks without any conditionals. This allows the wxStrcoll function to be recognized and declared correctly in the context of MSVS 2019.

4. Save and Rebuild

After making the changes, save the wxcrt.h file and attempt to rebuild your project. With this modification, the wxStrcoll error should be resolved.

Recommendation for Future Projects

It’s worth noting that this issue has been fixed in later versions of wxWidgets. If you can, consider upgrading to wxWidgets version 3.1.3 or above, which includes the necessary declarations to compile projects in MSVS 2019 without needing to modify header files manually.

Benefits of Upgrading:

Easier Setup: New versions come with improvements in compatibility for modern compilers and IDEs.

Latest Features: Upgrading provides access to new features and enhancements in the wxWidgets library.

Fewer Errors: Issues like this are often resolved in newer versions, leading to smoother development experiences.

Conclusion

Dealing with build errors can be a hassle, particularly when working with external libraries like wxWidgets. By following the steps outlined above, you can quickly resolve the wxStrcoll not found error due to the missing declarations in wxWidgets version 3.0.5. However, for a more seamless experience, consider upgrading to a more recent version of wxWidgets that supports MSVS 2019 out of the box.

Keep coding and happy developing!