Invalid compiler control in ".i"

Question

I have the following lines in a header file (line numbers appear on the left):
64#if defined( sparc )
65 #include <sys/types.h>
66 #include <pthread.h>
67#endif
When I compile the program I get the following errors:
"/home/user/include/structure.h", line 65: invalid compiler control in ".i" file
"/home/user/include/structure.h", line 66: invalid compiler control in ".i" file
I've precompiled the code (with -P), and the resulting .i file contains the
lines "#include <sys/types.h>" and "#include <pthread.h>".
What's the deal?

Answer 1

The preprocessor requires that the # be the first character in the line. This worked:
#if defined(sparc)
# include <sys/types.h>
# include <pthread.h>
#endif