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Groups > comp.lang.c++ > #91656
| From | Ben Bacarisse <ben.usenet@bsb.me.uk> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: Problem with calling C++ from Fortran |
| Date | 2023-09-10 17:27 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <87il8ij8n5.fsf@bsb.me.uk> (permalink) |
| References | <udhbs9$e5d$1@dont-email.me> <udhcaj$j8l$1@dont-email.me> <udkdu9$itm4$1@dont-email.me> <87o7iajh8b.fsf@bsb.me.uk> |
Ben Bacarisse <ben.usenet@bsb.me.uk> writes:
> db <dieterhansbritz@gmail.com> writes:
>
>> On 09.09.2023 11.02, Muttley@dastardlyhq.com wrote:
>>> On Sat, 9 Sep 2023 10:54:33 +0200
>>> db <dieterhansbritz@gmail.com> wrote:
>>>> but now it says that C-double doesn't exist.
>>>>
>>>> Any ideas?
>>> C++ mangles function names so that the name you give the function isn't
>>> the
>>> name the dynamic loader sees in the binary. You need to put this around whatever
>>> function you want to call from Fortran so it has C style linkage which means
>>> the name remains the same:
>>> extern "C" {
>>> void calledFromFortran()
>>> {
>>> :
>>> }
>>> }
>>>
>> Where should this go in the code? I added it at the end as is,
>> and now I get this:
>>
>> ~/ownlib90/tests> ./jbandtest
>> jband.cpp:88:1: error: expected initializer before 'extern'
>> 88 | extern "C" {
>> | ^~~~~~
>> jband.cpp:96:1: error: expected unqualified-id before '{' token
>> 96 | {
>> | ^
>> jband.cpp: In function 'void calledFromFortran()':
>> jband.cpp:350:9: error: expected primary-expression before ':' token
>> 350 | :
>> ...
>
> You are giving people very little to go on. There's an unknown command
> (./jbandtest) the gives some errors where only one line of code can be
> seen.
>
> Can you produce a cut-down version to the program that shows the same
> error -- mimimal example of the C++ and of the Fortran that should
> calls it but which fails? That would mean you could post the code.
I see you have indeed posted half of it. If you post the C++ source,
someone might be able to help with both parts. I can tell you a bit
about what's wrong with the Fortran you posted, but I need to see the
other half.
--
Ben.
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Problem with calling C++ from Fortran db <dieterhansbritz@gmail.com> - 2023-09-09 10:54 +0200
Re: Problem with calling C++ from Fortran Muttley@dastardlyhq.com - 2023-09-09 09:02 +0000
Re: Problem with calling C++ from Fortran db <dieterhansbritz@gmail.com> - 2023-09-09 12:47 +0200
Re: Problem with calling C++ from Fortran Muttley@dastardlyhq.com - 2023-09-09 10:51 +0000
Re: Problem with calling C++ from Fortran db <dieterhansbritz@gmail.com> - 2023-09-09 12:52 +0200
Re: Problem with calling C++ from Fortran Muttley@dastardlyhq.com - 2023-09-09 11:00 +0000
Re: Problem with calling C++ from Fortran db <dieterhansbritz@gmail.com> - 2023-09-10 14:33 +0200
Re: Problem with calling C++ from Fortran Paavo Helde <eesnimi@osa.pri.ee> - 2023-09-10 18:49 +0300
Re: Problem with calling C++ from Fortran Muttley@dastardlyhq.com - 2023-09-11 08:23 +0000
Re: Problem with calling C++ from Fortran Paavo Helde <eesnimi@osa.pri.ee> - 2023-09-09 16:56 +0300
Re: Problem with calling C++ from Fortran db <dieterhansbritz@gmail.com> - 2023-09-10 14:36 +0200
Re: Problem with calling C++ from Fortran James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-09-11 00:14 -0400
Re: Problem with calling C++ from Fortran Bo Persson <bo@bo-persson.se> - 2023-09-10 16:08 +0200
Re: Problem with calling C++ from Fortran "Alf P. Steinbach" <alf.p.steinbach@gmail.com> - 2023-09-09 16:30 +0200
Re: Problem with calling C++ from Fortran db <dieterhansbritz@gmail.com> - 2023-09-10 14:48 +0200
Re: Problem with calling C++ from Fortran Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-09-10 14:22 +0100
Re: Problem with calling C++ from Fortran Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-09-10 17:27 +0100
Re: Problem with calling C++ from Fortran db <dieterhansbritz@gmail.com> - 2023-09-11 14:00 +0200
Re: Problem with calling C++ from Fortran Michael S <already5chosen@yahoo.com> - 2023-09-11 05:21 -0700
Re: Problem with calling C++ from Fortran Muttley@dastardlyhq.com - 2023-09-11 13:33 +0000
Re: Problem with calling C++ from Fortran Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-09-12 00:26 +0100
Re: Problem with calling C++ from Fortran db <dieterhansbritz@gmail.com> - 2023-09-12 10:48 +0200
Re: Problem with calling C++ from Fortran Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-09-12 14:14 +0100
Re: Problem with calling C++ from Fortran Michael S <already5chosen@yahoo.com> - 2023-09-12 07:15 -0700
Re: Problem with calling C++ from Fortran Michael S <already5chosen@yahoo.com> - 2023-09-12 02:00 -0700
Re: Problem with calling C++ from Fortran Ben Bacarisse <ben.usenet@bsb.me.uk> - 2023-09-12 14:22 +0100
Re: Problem with calling C++ from Fortran Michael S <already5chosen@yahoo.com> - 2023-09-12 07:32 -0700
Re: Problem with calling C++ from Fortran db <dieterhansbritz@gmail.com> - 2023-09-12 18:36 +0200
Re: Problem with calling C++ from Fortran Michael S <already5chosen@yahoo.com> - 2023-09-19 02:39 -0700
Re: Problem with calling C++ from Fortran Michael S <already5chosen@yahoo.com> - 2023-09-10 08:38 -0700
Re: Problem with calling C++ from Fortran Michael S <already5chosen@yahoo.com> - 2023-09-10 09:51 -0700
Re: Problem with calling C++ from Fortran Michael S <already5chosen@yahoo.com> - 2023-09-11 02:49 -0700
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