Software⏱️ 3 min read📅 2026-06-19

How to Fix: Ruby Compile error Windows 7 x64

Ruby Compile error on Windows 7 x64

Quick Answer: Check the file path and ensure that the 'probes.h' file is in the correct location.

📋 Table of Contents

  1. 🛑 Root Causes of the Error
  2. ✅ Best Solutions to Fix It
  3. ✨ Wrapping Up

Ruby 2.2.0 compilation on Windows 7 x64 is failing due to an error when using nmake. This issue affects users who are trying to build Ruby from source on their 32-bit and 64-bit systems.

This error can be frustrating for developers who are new to compiling software from source, as it requires patience and a good understanding of the compilation process.

🛑 Root Causes of the Error

  • The primary reason for this error is due to the incorrect placement of the 'probes.h' file. The nmake command is unable to find this file because it is not in the correct location.
  • Another possible cause is related to the version of Visual Studio being used, which may be incompatible with Ruby's compilation requirements.

✅ Best Solutions to Fix It

Fixing the 'probes.h' File Location

  1. Step 1: Step 1: Locate the 'probes.h' file in the Ruby source code directory. It should be located at 'include/ruby/ridl/probes.h'.
  2. Step 2: Step 2: Copy the 'probes.h' file to a location that is accessible by nmake, such as 'C: uby idl' or 'C: uby iddle'.
  3. Step 3: Step 3: Update the 'nmake.mak' file in the Ruby source code directory to point to the correct location of the 'probes.h' file. This should be done by changing the line `$(RIDL) = $(RIDL)/ridl` to `$(RIDL) = C: uby iddle idl`.
  4. Step 4: Step 4: Run nmake again to see if the error is resolved.

Updating Visual Studio Version

  1. Step 1: Step 1: Check the version of Visual Studio being used. If it's earlier than Visual Studio 2010, it may not be compatible with Ruby's compilation requirements.
  2. Step 2: Step 2: Download and install a newer version of Visual Studio that is compatible with Ruby. For this example, we'll use Visual Studio 2015.
  3. Step 3: Step 3: Update the 'nmake.mak' file in the Ruby source code directory to point to the correct location of the Visual Studio bin folder. This should be done by changing the line `$(VCS) = $(VCS)/bin` to `$(VCS) = C: oolsetin`.
  4. Step 4: Step 4: Run nmake again to see if the error is resolved.

✨ Wrapping Up

By following these steps, users should be able to resolve the Ruby compilation error on Windows 7 x64. Remember to always check the version of Visual Studio and update it if necessary, as this can often resolve compatibility issues.

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