(g77.info)Cpp-style directives

Cpp-style directives
--------------------

   `cpp' output-style `#' directives (*note C Preprocessor Output:
(cpp)C Preprocessor Output.)  are recognized by the compiler even when
the preprocessor isn't run on the input (as it is when compiling `.F'
files).  (Note the distinction between these `cpp' `#' *output*
directives and `#line' *input* directives.)