Date: Tue, 23 Apr 1996 18:51:42 +1000
From: root <root AT linuxbox DOT nse DOT com DOT au>
Message-Id: <199604230851.SAA07134@linuxbox.nse.com.au>
To: djgpp AT delorie DOT com
Subject: PDCURSES in a C++ program can it be done with djgpp?
Reply-To: naderr AT topaz DOT cqu DOT edu DOT au

Hi,

As the title says.

I have two programs using curses, one in straight C,
the other mixture of C & C++.

While on other platforms ( Linux with g++-2.7.1.4 ) and with a different
DOS compiler ( BCC/TLINK  3.1) I can compile the C++ one,
with DJGPP && gxx I can not.  Weird I reckon :)

Hmm,

Ok, I boiled it down to a simplisimus curses program:
( the real program is about 32k so I'm not going to flood the world
with it when a simple example has the same effect ( for me ) )


#include <stdlib.h>
#include <stdio.h>
#include <curses.h>

void init_curses(void);
void end_curses(void);

void init_curses(void)
{
    /* we must initialize the curses data structure only once */
    initscr();
    /* in general, will want these modes */
    start_color();
    cbreak();
    noecho();
    scrollok(stdscr, TRUE);
    keypad(stdscr, TRUE);
}

void end_curses(void)
{
  endwin();
}

int main(void)
{
  init_curses();
  end_curses();
  return (EXIT_SUCCESS);
}

/* eof */


And have tried to compile it as tcurs.cc with gxx and it fails.

However, if I compile as tcurs.c with gcc it succeds ... what gives?

Hmm, my DGJPP.ENV has the necessary 'include' and 'lib' paths to
handle it ( I believe ) ... here it is ....


#= Don't edit this line unless you move djgpp.env outside
#= of the djgpp installation directory.  If you do move
#= it, set DJDIR to the directory you installed DJGPP in.
#=
DJDIR=%:/>DJGPP%

+USER=dosuser
+TMPDIR=%DJDIR%/tmp
+EMU387=%DJDIR%/bin/emu387.dxe
+LFN=n

[bison]
BISON_HAIRY=%DJDIR%/lib/bison.hai
BISON_SIMPLE=%DJDIR%/lib/bison.sim

[cpp]
CPLUS_INCLUDE_PATH=%/>;CPLUS_INCLUDE_PATH%%DJDIR%/lang/cxx;%DJDIR%/include;%DJDIR%/contrib/grx20/include;%DJDIR%/contrib/pdcurs22/include
C_INCLUDE_PATH=%/>;C_INCLUDE_PATH%%DJDIR%/include;%DJDIR%/contrib/grx20/include;%DJDIR%/contrib/pdcurs22/include
OBJCPLUS_INCLUDE_PATH=%/>;OBJCPLUS_INCLUDE_PATH%%DJDIR%/include;%DJDIR%/lang/objc
OBJC_INCLUDE_PATH=%/>;OBJC_INCLUDE_PATH%%DJDIR%/include;%DJDIR%/lang/objc

[gcc]
COMPILER_PATH=%/>;COMPILER_PATH%%DJDIR%/bin
LIBRARY_PATH=%/>;LIBRARY_PATH%%DJDIR%/lib;%DJDIR%/contrib/grx20/lib;%DJDIR%/contrib/pdcurs22/lib

[info]
INFOPATH=%/>;INFOPATH%%DJDIR%/info


Is the above correct?


And the part of makefile with which I compile this program for DJGPP V2

######################################################################
##
## MSDOS  
##
## C++ Compiler
CXX=gxx
## 
## Compiler flags
CFLAGS=-O2 -g -Wall
##
##
ICURSES=
##
## Linker flags
LDFLAGS=-lcurso
##
## Target compiled extension
EXE=.exe
##
##
## Object code extension
OBJ=
##
## Backup extension
BAK=.bak
##
RM=rm
##
########################################################################
## Operating System Independent section 
##
##                 D O   N O T   E D I T
##                 =====================
## C Compiler
CC=gcc
##
## C Source file extension
CSOURCE=.c 
##
## C++ Source file Extension
CXXSOURCE=.cc
##
## Program name
PROGRAM=tcurs
##
#########################################################################
##
## Nothing to change below this line!
##
#########################################################################
.PHONY: all clean

all:	$(PROGRAM)


$(PROGRAM):	tcurs.cc
	$(CXX) $(CFLAGS) $(ICURSES) $@$(CXXSOURCE) -o $@$(EXE) $(LDFLAGS)

clean:
	-$(RM)  *~ $(PROGRAM)$(EXT)

# eof makefile



Or try 

$(PROGRAM):	tcurs.c
	$(CC) $(CFLAGS) $(ICURSES) $@$(CSOURCE) -o $@$(EXE) $(LDFLAGS)
	

for the pure C style compilation/linking that succeds :)


Now, if anyone can please tell me:

(1) what am I doing _wrong_ that makes the gxx compile fail
and/or
(2) make it compile under gxx succesfully
or
(3) tell me with certainty that it is not going to compile with gxx
no matter what I try ....


I'll be a happy lad :)  < it's driving up the wall :)

Thanks in advance,

regards,


		Rob