From: George Foot <mert0407 AT sable DOT ox DOT ac DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: What to use to Compile
Date: 23 Apr 1998 07:00:58 GMT
Organization: Oxford University, England
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To: djgpp AT delorie DOT com
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On Thu, 23 Apr 1998 14:23:01 +1000 in comp.os.msdos.djgpp Access One
<grant DOT slender AT gecits DOT com DOT au> wrote:

: Hi, just wondering what I would need to type to compile these
: filenames...they are all C++

: ass3.h
: ass3.cpp => includes "ass3.h"
: ass3main.cpp => includes "ass3.h"

: I have tried gcc and gpp but I get different results...??

: What is the correct way to compile and link a program using djgpp??

To compile you use `gcc' or `gpp', with the `-c' option (add others to
your taste); this generates a .o file for each .cpp file.  You don't
compile the .h file; it is only there to be included in the other two.

To link, use `gpp'.  Specify the output file by using the `-o' switch,
and add others to your taste.  For example:

  gcc -c -O2 -Wall -g -m486 *.cpp     (compiles to .o files)
  gpp -o prog.exe *.o                 (links .o files to a .exe)

In the linking command you can use `gcc' instead, but you'd have to
manually specify any libraries it needs, e.g.

  gcc -o prog.exe *.o -lstdcxx        (links in the standard C++ library)

This information can be found in the file "readme.1st", which you
should read first.

You'd probably benefit from downloading and learning to use the GNU
Make utility.  Get the `mak' binary zip from the v2gnu directory on
your local Simtelnet mirror, and then type:

  info make

for more details.

-- 
george DOT foot AT merton DOT oxford DOT ac DOT uk

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