LVSysIncludes.h is a list of header files for a target platform. Depending on the target platform, LVSysIncludes.h contains platform-specific header files, toolchain-specific header files, and standard C header files. Most files in the labview\CCodeGen directory include LVSysIncludes.h.
You must choose which .h files from the target to include in LVSysIncludes.h. The C Generator includes an example LVSysIncludes.h file for several platforms. If you are using one of the example platforms, you can use the installed LVSysIncludes.h file for that platform instead of creating a new file. The LVSysIncludes.h files are located in platform-specific folders in the labview\CCodeGen\include\platform directory.