Is there any way to force Sun C++ Preprocessor preserve whitespace?

Question

Hello!
I'm preprocessing simple source file:
void test()
    int i;
}with command: CC -E test.cpp
and CC preprocessor eats all whitespace at the beginning of each line, like this:
void test()
int i;
}Is there any way to force CC preprocessor preserve whitespace?

Answer 1

You cannot use the C preprocessor on C++ code, for at least two major reasons.
1. The default -I options in CC are not the same as for cc. Try adding
#include <iostream>
#include <cstdlib>
to your example.
Even if you add the missing -I options, the conventions for finding the C++ standard headers are not known to the C preprocessor.
Example:
% cc -P -I/opt/SUNWspro/prod/include/CC/Cstd -I/opt/SUNWspro/prod/include/CC -I/opt/SUNWspro/prod/include/cc z.c
"z.c", line 2: cannot find include file: <cstdlib>
cc: acomp failed for z.c2. The predefined macros (-D options and predefined macros built into the compilers) are different for cc and CC.
In particular, the C compiler predefines macros saying it is a C compiler. The C++ compiler predefines macros saying it is a C++ compiler. Code that is conditionalized on whether it is compiled by the C or C++ compiler will give different results. If you add -D options for C++ macros, the results will depend on the way the tests are coded. That is, testing for a C compiler or a C++ compiler will not give mutually exclusive answers, as they would if you use the correct compiler. The Solaris headers have conditional code for C and C++.