Groups > comp.lang.java.programmer > #38450

Re: No more free JRE - Java is dead?

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From	Arne Vajhøj <arne@vajhoej.dk>
Newsgroups	comp.lang.java.programmer
Subject	Re: No more free JRE - Java is dead?
Date	Thu, 28 Jun 2018 18:32:11 -0400
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On 6/28/2018 3:40 PM, Martin Gregorie wrote:
> On Wed, 27 Jun 2018 20:14:50 -0400, Arne Vajhøj wrote:
> 
>> On 6/27/2018 4:38 PM, Martin Gregorie wrote:
>>> On Wed, 27 Jun 2018 12:24:29 -0700, Eric Douglas wrote:
>>>> Is C++ platform independent?
>>>>
>>> It is to the extent that the GNU C compiler is portable because GNU C++
>>> is essentially just a preprocessor: it generates C, which is then fed
>>> to the GNU G compiler to produce an executable.
>>
>> That was how the original C++ compiler cfront worked.
>>
>> I don't think GNU C++ (g++) works that way.
>>
> It seems to have changed again recently: currently it looks as though
> there is one frontend for each language. All frontends produce the same
> output (an intermediate language called GIMPLE) which is passed to the
> optimiser and backend. The latter generates target-specific assembler,

That is all within same executable.

> However, its also possible I've misunderstood the setup because I found
> the GNU documentation quite opaque and have basically ended up
> summarising the Wikipedia "GNU Compiler Collection" page, so all
> corrections greatfully received.

Just use gcc -v and g++ -v and they reveal what they run.

> The bottom line: to compile another language such as Java or COBOL yo
> have to write a new front end, but are expected to reuse the optimiser
> and backend as well as the target-specific assembler and linker.

That is how compilers are done today and has been for many years.

The distinct backend for each compiler is too expensive.

Arne

Thread

No more free JRE - Java is dead? slawek <x.y@org.org> - 2018-06-27 09:29 +0200
  Re: No more free JRE - Java is dead? Martin Gregorie <martin@mydomain.invalid> - 2018-06-27 12:00 +0000
  Re: No more free JRE - Java is dead? Eric Douglas <e.d.programmer@gmail.com> - 2018-06-27 08:24 -0700
  Re: No more free JRE - Java is dead? Marcel Mueller <news.5.maazl@spamgourmet.org> - 2018-06-27 20:07 +0200
    Re: No more free JRE - Java is dead? Eric Douglas <e.d.programmer@gmail.com> - 2018-06-27 12:24 -0700
      Re: No more free JRE - Java is dead? Marcel Mueller <news.5.maazl@spamgourmet.org> - 2018-06-27 21:50 +0200
        Re: No more free JRE - Java is dead? Eric Douglas <e.d.programmer@gmail.com> - 2018-06-27 13:35 -0700
      Re: No more free JRE - Java is dead? Martin Gregorie <martin@mydomain.invalid> - 2018-06-27 20:38 +0000
        Re: No more free JRE - Java is dead? Arne Vajhøj <arne@vajhoej.dk> - 2018-06-27 20:14 -0400
          Re: No more free JRE - Java is dead? Martin Gregorie <martin@mydomain.invalid> - 2018-06-28 19:40 +0000
            Re: No more free JRE - Java is dead? Arne Vajhøj <arne@vajhoej.dk> - 2018-06-28 18:32 -0400
              Re: No more free JRE - Java is dead? Martin Gregorie <martin@mydomain.invalid> - 2018-06-28 23:15 +0000
  Re: No more free JRE - Java is dead? Arne Vajhøj <arne@vajhoej.dk> - 2018-06-27 20:09 -0400
    Re: No more free JRE - Java is dead? Arne Vajhøj <arne@vajhoej.dk> - 2018-06-27 21:07 -0400
  Re: No more free JRE - Java is dead? Haddock <ffm2002@web.de> - 2018-07-11 23:31 -0700
    Re: No more free JRE - Java is dead? Arne Vajhøj <arne@vajhoej.dk> - 2018-07-14 14:01 -0400
      Re: No more free JRE - Java is dead? Eric Douglas <e.d.programmer@gmail.com> - 2018-07-20 05:51 -0700
        Re: No more free JRE - Java is dead? Arne Vajhøj <arne@vajhoej.dk> - 2018-07-20 21:43 -0400
    Re: No more free JRE - Java is dead? Jukka Lahtinen <jtfjdehf@hotmail.com.invalid> - 2018-07-15 14:04 +0300

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