Re: [Plib-users] link plib into code on mac osx

[Steve B. <sjb...@ai...>]

Bernhard Windisch wrote:

> It is completely right that the compiler doesn't recognise the language 
> of pu.h. The problem is that the application IS indeed written in C++ 
> and has been compiled using g++-3.3 without any problems as long as I 
> don't include the header pu.h.

But think about this - the header file is being '#include'd into the
source for your application.  The compiler doesn't "recognise the language
of pu.h" - it takes the ASCII characters inside that file and inserts them
at that point into your application file.  Then the resulting ASCII stream
is compiled using whatever language the application is written in.  The
compiler doesn't *see* included files as things to be compiled in their
own right.

So - it seems that your application is being compiled as C code - and
not C++.  Perhaps your application code is sufficiently C-like that it's
being successfully compiled as C - until you include some header files that
are more certainly in C++.

Why that should be, I'm not sure.

> g++ -g -I/usr/include/gcc/darwin/3.3/c++ -c MePSim.C

The '.C' extension (capital C) certainly indicates to the compiler that
the code should be C++ - is it possible that something on the Mac is
forcing the filename into lowercase before passing it to the compiler??!?

Try renaming the source file to .cc or .cxx

Another slightly odd thing is that the first error the compiler notices
is:

 > /usr/include/plib/ul.h: In function `void ulEndianSwap(short unsigned int*)':
 > /usr/include/plib/ul.h:336: error: declaration of C function `void
 >   ulEndianSwap(short unsigned int*)' conflicts with
 > /usr/include/plib/ul.h:327: error: previous declaration `void
 >   ulEndianSwap(unsigned int*)' here

...well, there are a LOT of C++ language features earlier in ul.h that
ought to have been flagged by the compiler if it thought it was
compiling C.

---------------------------- Steve Baker -------------------------
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HomePage : http://www.sjbaker.org
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