The `_MSC_VER ` guard prevents rc.exe to compile some rc files

[viruscamp]

The _MSC_VER guard prevents rc.exe to compile some rc files

#ifndef _MSC_VER // [
#error "Use this header only with Microsoft Visual C++ compilers!"
#endif // _MSC_VER ]

for examples:

• libabc.h

#include <stdint.h>
#define LIBABC_VERSION "3.7.9"
int use_abc();

• libabc.rc

#include <libabc.h>
#include <windows.h>
\\
            VALUE "ProductVersion", LIBABC_VERSION
\\