171. Generating native binding for modf()

In Problem 160, we located, prepared, and called the modf() foreign function via the Foreign Linker API. Now, let’s use Jextract to generate the native binding needed to call modf().

For Windows, the modf() foreign function is described in the math.h header file. If you have installed MinGW (https://sourceforge.net/projects/mingw-w64/) for 64-bit, then this header file is available in the mingw64\x86_64-w64-mingw32\include folder. If we want to generate the native bindings for math.h, we can do it as follows:

Figure 7.26: Generating the native bindings from math.h

Or, as plain text:

C:\SBPBP\GitHub\Java-Coding-Problems-Second-Edition\Chapter07\P171_JextractAndModf>
  jextract --source --output src\main\java -t c.lib.math
  -I C:\MinGW64\mingw64\x86_64-w64-mingw32\include 
  C:\MinGW64\mingw64\x86_64-w64-mingw32\include\math.h

So, we generated the source files (--sources) in the src\main\java subfolder of...