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From:	Brian Inglis <Brian DOT Inglis AT SystematicSw DOT Invalid>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: DJPGG and Windows XP Professional + I think a Undefined Reference or linker problem
Organization:	Systematic Software
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Date:	Sat, 08 May 2004 16:22:11 GMT
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fn Sat, 08 May 2004 15:15:58 GMT in comp.os.msdos.djgpp, CBFalconer
<cbfalconer AT yahoo DOT com> wrote:

>wordsworth wrote:
>> "Tom" <Thomas8675309 AT yahoo DOT com> wrote in message
>>> Martin Stromberg wrote:
>>>> wordsworth <news AT callera DOT net> wrote:
>>>
>>>>> I have now tried gpp that compiles my prog.  So what is the
>>>>> difference between gcc and gpp
>>>>
>>>> gpp is the C++ compiler and gcc is the C compiler.
>>>
>>> gcc calls either the C compiler or the C++ compiler (or other
>>> programs) depending upon the file suffix of the file provided
>>> on the command line.  gpp is the same as gcc (I believe) but
>>> links in the C++ standard library by default, while gcc
>>> requires that the library be expressly listed on the command
>>> line to link it in.  So using gcc on a C++ source file will
>>> call the C++ compiler but fail to link in the C++ standard
>>> library unless you explicitly tell gcc to do so.  Which is
>>> why using gcc on C++ source files can lead to linker errors.
>>>
>>> (And yes, I recognize that Martin knows the difference and
>>> was simplifying to make it easier for new users.)
>> 
>> Thats almost cleared up this for me.
>> 
>> Thank you both for your explaination (very helpful); question? 
>> The C++ standard library is linked by default with gpp.  How
>> does this manifest itself - I dont mean where is the C++
>> library, but rather how is it linked? Is it compiled into a
>> binary or can I define its location (add config switches) in a
>> config file? Basically I should think that the linker error
>> can be amended.  I want to avoid having to add extra suff to
>> the compiler line when excuting cmd line compiles e.g. gpp
>> test.cc -o test.exe.
>
>Please don't top-post, it makes the posts incomprehensible.  I
>fixed this one.
>
>Isn't there some fundamental misunderstanding going on here?  gpp
>is the preprocessor. g++ is the C++ linking compiler.  gxx is used
>under djgpp to replace g++ because the '+' is not valid in a DOS
>file name.
>
>If you don't link to a final executable you can use either gcc or
>gxx.

Recent versions of GCC use cpp instead of gpp and gpp instead of gxx. 

-- 
Thanks. Take care, Brian Inglis 	Calgary, Alberta, Canada

Brian DOT Inglis AT CSi DOT com 	(Brian dot Inglis at SystematicSw dot ab dot ca)
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