I am trying to write cross platform i18n C++ code. Since most linux system prefer to use UTF-8 as the character encoding, I thought that I should use string on linux and wstring on Windows. Is tchar.h available on linux? What is an equivalent replacement on for tchar.h on Linux?
You may find this article to be useful. In particular, near the end they discuss a bit about using TCHAR and dealing with Windows code.
The article summarization is:
TCHAR will be translated into a wide character data type when compiling this code with the GNU C Compiler (most portable libraries define TCHAR in their headers and refer to wchar_t). This, in fact, was how I turned my C++ program into an anagram generator: I used standard C++ strings filled with UTF-8 and fed the data with pointers casted to wchar_t to library functions. UTF-8 data interpreted as UTF-32 equals garbage (but it is tremendously useful for obfuscation of data and bugs).