Windows系统下为Epitran安装Flite时编译报错求助

Hey there! Let's work through this Flite compilation issue you're facing in Cygwin—since you're new to C/C++ and Linux-like environments, I'll keep this straightforward and actionable.

What's causing the error? #

The problem boils down to Windows-specific code in Flite clashing with Cygwin's GCC compiler. The error messages mention _vsnprintf_s and _TRUNCATE—these are functions/macros unique to Microsoft's MSVC compiler, not the standard GCC toolchain that Cygwin uses. Flite's code tries to use these MSVC-only features, but your Cygwin environment doesn't recognize them.

Step-by-step fix #

1. Edit the problematic header file
   Navigate to your Flite source directory, then open include/cst_file.h with a text editor (like Notepad++ or Cygwin's nano). Find the c99_vsnprintf function (around line 108) and replace its implementation with a GCC-compatible version:

   static int c99_vsnprintf(char *str, size_t size, const char *format, va_list ap)
   {
       int count;
   #ifdef __CYGWIN__
       // Use standard vsnprintf for Cygwin's GCC
       count = vsnprintf(str, size, format, ap);
   #else
       // Keep original MSVC code for other Windows environments
       count = _vsnprintf_s(str, size, _TRUNCATE, format, ap);
   #endif
       return count;
   }
   

   This adds a check for Cygwin and uses the standard vsnprintf function that GCC understands, while leaving the original code intact for other Windows setups.

2. Clean and recompile
   Go back to your Cygwin terminal, make sure you're in the flite-2.0.5-current directory, then run:

   make clean && ./configure && make
   

3. Optional: Disable audio support (if needed)
   If you hit additional errors related to audio (since the error log mentions CST_AUDIO_NONE), you can skip compiling Flite's audio modules entirely—Epitran only needs the text-to-IPA functionality, not audio output. Run this instead of the regular configure command:

   ./configure --disable-audio && make
   

Why this works #

By swapping out the MSVC-specific _vsnprintf_s with the standard C vsnprintf, we're making the code compatible with Cygwin's GCC compiler. The conditional check ensures we don't break the code for users who might be compiling Flite with MSVC on Windows.

Once compilation finishes successfully, you'll be able to use Flite with Epitran on your Windows system.

内容的提问来源于stack exchange，提问作者Catalina Herrera