To whom it may concern,

I am trying to compile C and C++ code and I was wondering
how to include C++ code with C.  Also, if there are any
important things to remember when doing this please let me
know.  Below is a partial listing of my code.

In the main program voice.c++:

#include <gl/gl.h>
#include <gl/device.h>
#define CUBE
extern "C" {
#include "drawCode.h"
}
#include "cave.h"
#ifndef  AUDIO
  #include "audioOutPut.h"
  #include "audioInPut.h"
#endif

  ..
  ..
  ..
  ..


In drawCode.h:

#include <stdio.h>
#include <gl/gl.h>
#include <gl/device.h>
#include <gl/sphere.h>
#include <math.h>
#include <unistd.h>

void MyInit();
void MyDraw();


In drawCode.c:

#include "drawCode.h"
#include "materials.h"
#include "lights.h"
#include "cave.h"
#include "cube.h"
#define AUDIO
extern "CPP" {
#include "audioInPut.h"
#include "audioOutPut.h"
}

  ..
  ..
  ..
  ..


Makefile:

DEPEND     = Dpndfile
SRC     = voice.c++ drawCode.c audioInPut.c++ audioOutPut.c++ fft.c++
OBJ     = voice.o drawCode.o audioInPut.o audioOutPut.o fft.o

C_FLAG     = -g3 -c -I/usr/local/CAVE/include -L/usr/local/CAVE/lib
L_FLAG     = -g3 +w +p -o voice

STD_LIB     = -L/usr/local/CAVE/lib -laudio -laudiofile -laudioutil -lm -lcavesim5 -lsphere -lgutil -limage -lgl_s
STD_INCL    = -I/usr/include/CC -I/usr/include -I/usr/local/CAVE/include



########################

default: all

include $(DEPEND)

.c.o:
 cc -cckr $(C_FLAG) $(STD_INCL) $*.c

.c++.o:
 CC $(C_FLAG) $(STD_INCL) $*.c++

all: $(OBJ) $(DEPEND)
 CC $(L_FLAG) $(STD_INCL) $(OBJ) $(STD_LIB)

dep: $(SRC)
 CC -M $(SRC) $(STD_INCL) > $(DEPEND)
 make




Compiler Errors:

cfe: Error: drawCode.c, line 6: Syntax Error
 extern "CPP" {
 -------------^
cfe: Error: /usr/include/CC/iostream.h, line 49: Syntax Error
 class streambuf ;
 ------^
cfe: Error: /usr/include/CC/iostream.h, line 50: Syntax Error
 class ostream ;
 ------^
cfe: Error: /usr/include/CC/iostream.h, line 53: Syntax Error
 class ios {
 ------^
cfe: Error: /usr/include/CC/iostream.h, line 57: Syntax Error
        enum io_state   { goodbit=0, eofbit=1, failbit=2, badbit=4,
        ^
cfe: Error: /usr/include/CC/iostream.h, line 58: Syntax Error
                                hardfail=0200};
                                -------------^
cfe: Error: /usr/include/CC/iostream.h, line 62: Syntax Error
                                nocreate=040, noreplace=0100} ;
                                ----------------------------^
cfe: Error: /usr/include/CC/iostream.h, line 63: Syntax Error
        enum seek_dir   { beg=0, cur=1, end=2 } ;
        -------------   ----------------------^
cfe: Error: /usr/include/CC/iostream.h, line 79: Syntax Error
                          } ;
                        --^
cfe: Error: /usr/include/CC/iostream.h, line 87: Syntax Error
                        ios(streambuf*) ;
                        --------------^
cfe: Error: /usr/include/CC/iostream.h, line 90: Syntax Error
        long            flags() const   { return x_flags ; }
        ^
cfe: Error: /usr/include/CC/iostream.h, line 90: Syntax Error
        long            flags() const   { return x_flags ; }
        ----            --------^
cfe: Error: /usr/include/CC/iostream.h, line 91: Syntax Error
        long            flags(long f);
        ^
cfe: Error: /usr/include/CC/iostream.h, line 97: Syntax Error
        int             width() const   { return x_width ; }
        ---             --------^
cfe: Error: /usr/include/CC/iostream.h, line 98: Syntax Error
        int             width(int w)
        ^
cfe: Error: /usr/include/CC/iostream.h, line 104: Syntax Error
        ostream*        tie()           { return x_tie ; }
        --------        -----           ^
cfe: Error: /usr/include/CC/iostream.h, line 105: Syntax Error
        char            fill(char) ;
        ^
cfe: Error: /usr/include/CC/iostream.h, line 106: Syntax Error
        char            fill() const    { return x_fill ; }
        ----            -------^
cfe: Error: /usr/include/CC/iostream.h, line 107: Syntax Error
        int             precision(int) ;
        ^
cfe: Error: /usr/include/CC/iostream.h, line 108: Syntax Error
        int             precision() const       { return x_precision ; }
        ---             ------------^
cfe: Error: /usr/include/CC/iostream.h, line 110: Syntax Error
        int             rdstate() const { return state ; }
        ^
cfe: Error: /usr/include/CC/iostream.h, line 110: Syntax Error
        int             rdstate() const { return state ; }
        ---             ----------^
cfe: Error: /usr/include/CC/iostream.h, line 111: Syntax Error
                        operator void*()
                        ---------^
cfe: Error: /usr/include/CC/iostream.h, line 116: Syntax Error
                        operator const void*() const
                        ---------^
cfe: Error: /usr/include/CC/iostream.h, line 122: Syntax Error
        int             operator!() const
        ^
cfe: Error: /usr/include/CC/iostream.h, line 124: Syntax Error
        int             eof() const     { return state&eofbit; }
        ^
cfe: Error: /usr/include/CC/iostream.h, line 124: Syntax Error
        int             eof() const     { return state&eofbit; }
        ---             ------^
cfe: Error: /usr/include/CC/iostream.h, line 125: Syntax Error
        int             fail() const    { return state&(failbit|badbit|hardfail); }
        ^
cfe: Error: /usr/include/CC/iostream.h, line 125: Syntax Error
        int             fail() const    { return state&(failbit|badbit|hardfail); }
        ---             -------^
cfe: Error: /usr/include/CC/iostream.h, line 126: Syntax Error
        int             bad() const     { return state&badbit ; }
        ^
cfe: Fatal: Too many errors... goodbye.
*** Error code 1 (bu21)



You can either post the answer up or send it to me.

Thank you,

Darren.