I'm a java background developer trying to get a feel for this language. come across my first stumbling block. simply want to call a method from a different '.d' file. i have seen this technique used in the wc.d/file.d example. cant figure out why it wont work for me. my simple test example follows (keep in mind, files are in same directory and i am trying to compile 'test1.d'). is there something obvious that i have missed?

the result of my compile of test1.d....
test1.obj(test1)
Error 42: Symbol Undefined _Dtest2_testMethod_FZi
--- errorlevel 1

--------------
test1.d
--------------
import c.stdio;
import test2;

int main(char[][] args)
{
printf("%d", testMethod());
return 0;
}
--------------
test2.d
--------------
import c.stdio;

int testMethod()
{
return 1;
}
--------------

Try compiling both source files on the commandline in one call (ie "dmd test1.d test2.d").

The alternative is to build all your source files with the -c switch, which generates .OBJ (object code) for each source file, then link those all up with the link command.

 -- andy

paul stanton wrote:
> I'm a java background developer trying to get a feel for this language. come
> across my first stumbling block. simply want to call a method from a different
> '.d' file. i have seen this technique used in the wc.d/file.d example. cant
> figure out why it wont work for me. my simple test example follows (keep in
> mind, files are in same directory and i am trying to compile 'test1.d'). is
> there something obvious that i have missed?
> 
> the result of my compile of test1.d....
> test1.obj(test1)
> Error 42: Symbol Undefined _Dtest2_testMethod_FZi
> --- errorlevel 1
> 
> --------------
> test1.d
> --------------
> import c.stdio;
> import test2;
> 
> int main(char[][] args)
> {
> printf("%d", testMethod());
> return 0;
> }
> --------------
> test2.d
> --------------
> import c.stdio;
> 
> int testMethod()
> {
> return 1;
> }
> --------------
> 
> 

Thanks. ok, now i think i understand the 3 files and their relevance...

exe - linked compiled code
obj - unlinked compiled code
map - linking information

if i am right (probably slightly off) is it true that the obj and map files are irrelevant once the exe is created?

In article <b07mie$24ee$1@digitaldaemon.com>, Andy Friesen says...
>
>Try compiling both source files on the commandline in one call (ie "dmd test1.d test2.d").
>
>The alternative is to build all your source files with the -c switch, which generates .OBJ (object code) for each source file, then link those all up with the link command.
>
>  -- andy
>
>paul stanton wrote:
>> I'm a java background developer trying to get a feel for this language. come across my first stumbling block. simply want to call a method from a different '.d' file. i have seen this technique used in the wc.d/file.d example. cant figure out why it wont work for me. my simple test example follows (keep in mind, files are in same directory and i am trying to compile 'test1.d'). is there something obvious that i have missed?
>> 
>> the result of my compile of test1.d....
>> test1.obj(test1)
>> Error 42: Symbol Undefined _Dtest2_testMethod_FZi
>> --- errorlevel 1
>> 
>> --------------
>> test1.d
>> --------------
>> import c.stdio;
>> import test2;
>> 
>> int main(char[][] args)
>> {
>> printf("%d", testMethod());
>> return 0;
>> }
>> --------------
>> test2.d
>> --------------
>> import c.stdio;
>> 
>> int testMethod()
>> {
>> return 1;
>> }
>> --------------
>> 
>> 
>

oh, another couple of questions....
how do i use the link command (tried and failed)
why when i compile the wc.d and wc2.d examples, dont i need to compile file.d in
the same call?

>In article <b07mie$24ee$1@digitaldaemon.com>, Andy Friesen says...
>>
>>Try compiling both source files on the commandline in one call (ie "dmd test1.d test2.d").
>>
>>The alternative is to build all your source files with the -c switch, which generates .OBJ (object code) for each source file, then link those all up with the link command.
>>
>>  -- andy
>>
>>paul stanton wrote:
>>> I'm a java background developer trying to get a feel for this language. come across my first stumbling block. simply want to call a method from a different '.d' file. i have seen this technique used in the wc.d/file.d example. cant figure out why it wont work for me. my simple test example follows (keep in mind, files are in same directory and i am trying to compile 'test1.d'). is there something obvious that i have missed?
>>> 
>>> the result of my compile of test1.d....
>>> test1.obj(test1)
>>> Error 42: Symbol Undefined _Dtest2_testMethod_FZi
>>> --- errorlevel 1
>>> 
>>> --------------
>>> test1.d
>>> --------------
>>> import c.stdio;
>>> import test2;
>>> 
>>> int main(char[][] args)
>>> {
>>> printf("%d", testMethod());
>>> return 0;
>>> }
>>> --------------
>>> test2.d
>>> --------------
>>> import c.stdio;
>>> 
>>> int testMethod()
>>> {
>>> return 1;
>>> }
>>> --------------
>>> 
>>> 
>>
>
>

----- Original Message -----
From: "Paul Stanton" <Paul_member@pathlink.com>
Newsgroups: D
Sent: Thursday, January 16, 2003 9:16 PM
Subject: Re: calling method from another 'd' file


> oh, another couple of questions....
> how do i use the link command (tried and failed)

try using the -L switch as such: dmd -L test1.obj test2.obj

> why when i compile the wc.d and wc2.d examples, dont i need to compile
file.d in
> the same call?
>

That's because file.d has been compiled and linked to the phosbos library. When the user needs it, the compiler already has a copy on hand in the library, so it gets it from there.

Andrew

"Paul Stanton" <Paul_member@pathlink.com> wrote in message news:b07oq1$25j6$1@digitaldaemon.com...
> Thanks. ok, now i think i understand the 3 files and their relevance...
>
> exe - linked compiled code
> obj - unlinked compiled code
> map - linking information
>
> if i am right (probably slightly off) is it true that the obj and map
files are
> irrelevant once the exe is created?
>

My understanding in my very short time at programming is that this is true for small, trivial programs. However, once your project size increases, those object files are used to create libraries. Which in turn, cuts down on the amount recompilations necessary for unchanged files.

"Paul Stanton" <Paul_member@pathlink.com> escreveu na mensagem news:b07p1k$25pg$1@digitaldaemon.com...
> oh, another couple of questions....
> how do i use the link command (tried and failed)
> why when i compile the wc.d and wc2.d examples, dont i need to compile
file.d in
> the same call?

[snip]

Hi,

    You can just use:


dmd file1.d file2.d -c


and then


link file1.obj file2.obj


    It should be sufficient. I also struggled with compile and link steps
(I'm also spoiled by Java's compiler). When your codebase gets larger it's
better to get a build system. Dmd comes with a make like utility, but you
can use ant if you're familiar with it. I think I'll write an article about
10 easy steps from java to D ;-)

    Best regards,
    Daniel Yokomiso.


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> link file1.obj file2.obj
>

Thanks, I tried using this but it wouldn't work...had to inspect my settings and it turns out my environment variables were set incorrectly.

Andrew