Standard Header Implementation

The C++ User's Guide explains in detail how standard headers are implemented along with the reasons for the implementation method. When you include any of the standard C or C++ headers, the compiler actually searches for a file with the specified name suffixed by ".SUNWCCh". For example, <string> causes a search for <string.SUNWCCh> and <string.h> causes a search for <string.h.SUNWCCh>. The compiler's include directory contains both spellings of the names, and each pair of spellings refers to the same file. For example, in directory include/CC you find both string and string.SUNWCCh. They refer to the same file, the one you get when you include <string>.

In error messages and debugger information, the suffix is suppressed. If you include <string>, error message and debugger references to that file mention string. File dependency information uses the name string.SUNWCCh to avoid problems with default makefile rules regarding unsuffixed names. If you want to search for just header files (using the SunOS find command, for example) you can look for the .SUNWCCh suffix.