компилировать стандартные программы на C (compile standard C programs)
Операнды (Operands)
The application shall ensure that at least one pathname operand
is specified. The following forms for pathname operands shall be
supported:
file.c A C-language source file to be compiled and optionally
linked. The application shall ensure that the operand
is of this form if the -c option is used.
file.a A library of object files typically produced by the ar
utility, and passed directly to the link editor.
Implementations may recognize implementation-defined
suffixes other than .a as denoting object file
libraries.
file.o An object file produced by c99 -c and passed directly
to the link editor. Implementations may recognize
implementation-defined suffixes other than .o as
denoting object files.
The processing of other files is implementation-defined.
