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digitalmars.D - Please Help! Linker problem (me!)

reply "Scott Egan" <scotte tpg.com.aux> writes:
Hi,

In another thread I mentioned that I would convert my game to D.  Well all
was good until step 3 of 45672345.

I looked at Walter's empire windows code and noticed that he wrapped the
globals in a struct - so I did too.

(This is when I decided that I had an issue with 'with').

Now here's where my lack of D savvy will show.  When I went to refer to the
struct in an other module I simply imported the module that the structure
was declared in.  It compiles but won't link.

I get 'Error 42: Symbol Undefined _D4iced6globalS4iced7globals' in the
importing obj module.  I've tried every combination of export, extern I
could think of; although I wouldn't have expected to need to.  I also tried
declaring the variable public, still no luck.

Any thoughts would be appreciated.

The structure definition and declaration are below.

struct globals {
 int Score;
 bit Random;
 HDC hDCVid, hDCScrn, hDCMem;
 HINSTANCE Instant;
 HWND hWndStat, hWndEdit, hWndIce;
 char GameName[];
 int Lives, Screen, Stands, CountDown, Diamonds, TimeOut, Loaded, xScr,
yScr, yText, yChar, xChar, Width, Height;
 byte SCRNX, SCRNY, retX, retY, GoodX, GoodY, HIT;
 byte[64][64] Scrn;
};

globals global;
May 02 2004
next sibling parent reply "Phill" <phill pacific.net.au> writes:
I dont think its a problem with the linker, maybe you
have just overlooked something.

Ive attached a simple example.

Phill.


"Scott Egan" <scotte tpg.com.aux> wrote in message
news:c72drs$hiu$1 digitaldaemon.com...

 Hi,

 In another thread I mentioned that I would convert my game to D.  Well all
 was good until step 3 of 45672345.

 I looked at Walter's empire windows code and noticed that he wrapped the
 globals in a struct - so I did too.

 (This is when I decided that I had an issue with 'with').

 Now here's where my lack of D savvy will show.  When I went to refer to




 struct in an other module I simply imported the module that the structure
 was declared in.  It compiles but won't link.

 I get 'Error 42: Symbol Undefined _D4iced6globalS4iced7globals' in the
 importing obj module.  I've tried every combination of export, extern I
 could think of; although I wouldn't have expected to need to.  I also




 declaring the variable public, still no luck.

 Any thoughts would be appreciated.
May 02 2004
parent reply "Scott Egan" <scotte tpg.com.aux> writes:
Thanks Phill.

I got yours working even after I moved the 'globals g' definition to the
glbl.d file.

The only diference I noted was that you used the module statement at the top
of the glbl.d file.

So I included it at the top of my file and the problem went away.

Now....why?!!!  The reat of my files are imported OK without module
statements.

I thought modulename = filename (less .d) if not specified.  Any thoughts?




"Phill" <phill pacific.net.au> wrote in message
news:c72hbg$mof$1 digitaldaemon.com...

 I dont think its a problem with the linker, maybe you
 have just overlooked something.

 Ive attached a simple example.

 Phill.


 "Scott Egan" <scotte tpg.com.aux> wrote in message
 news:c72drs$hiu$1 digitaldaemon.com...

 Hi,

 In another thread I mentioned that I would convert my game to D.  Well







 was good until step 3 of 45672345.

 I looked at Walter's empire windows code and noticed that he wrapped the
 globals in a struct - so I did too.

 (This is when I decided that I had an issue with 'with').

 Now here's where my lack of D savvy will show.  When I went to refer to




 struct in an other module I simply imported the module that the







 was declared in.  It compiles but won't link.

 I get 'Error 42: Symbol Undefined _D4iced6globalS4iced7globals' in the
 importing obj module.  I've tried every combination of export, extern I
 could think of; although I wouldn't have expected to need to.  I also




 declaring the variable public, still no luck.

 Any thoughts would be appreciated.
May 03 2004
parent reply "Phill" <phill pacific.net.au> writes:
"Scott Egan" <scotte tpg.com.aux> wrote in message
news:c75aun$1qhc$1 digitaldaemon.com...

 Thanks Phill.

 I got yours working even after I moved the 'globals g' definition to the
 glbl.d file.

 The only diference I noted was that you used the module statement at the




 of the glbl.d file.

 So I included it at the top of my file and the problem went away.

 Now....why?!!!  The reat of my files are imported OK without module
 statements.

 I thought modulename = filename (less .d) if not specified.  Any thoughts?



it works either way with mine.
I am not familiar with the way that the 'module'
thing works, or whether you have to compile it
in a similar way to Java's packages.

Im waiting for Mathew's book. :o))
Or a tutorial to be written.

I also use DIDE.
See my other post, maybe it can help.

Phill.
May 03 2004
parent reply "Matthew" <matthew.hat stlsoft.dot.org> writes:
"Phill" <phill pacific.net.au> wrote in message
news:c75bcl$1r05$1 digitaldaemon.com...

 "Scott Egan" <scotte tpg.com.aux> wrote in message
 news:c75aun$1qhc$1 digitaldaemon.com...

 Thanks Phill.

 I got yours working even after I moved the 'globals g' definition to the
 glbl.d file.

 The only diference I noted was that you used the module statement at the




 of the glbl.d file.

 So I included it at the top of my file and the problem went away.

 Now....why?!!!  The reat of my files are imported OK without module
 statements.

 I thought modulename = filename (less .d) if not specified.  Any thoughts?



 it works either way with mine.
 I am not familiar with the way that the 'module'
 thing works, or whether you have to compile it
 in a similar way to Java's packages.

 Im waiting for Mathew's book. :o))



What book? What're you talking about. ;)

(As soon as I can get DTL done and out of the way, then maybe I can pay
attention
to some other, more potentially lucrative matters ... <G>)


 Or a tutorial to be written.

 I also use DIDE.
 See my other post, maybe it can help.
May 07 2004
parent reply "Phill" <phill pacific.net.au> writes:
"Matthew" <matthew.hat stlsoft.dot.org> wrote in message
news:c7hdi7$29ok$1 digitaldaemon.com...

 "Phill" <phill pacific.net.au> wrote in message
 news:c75bcl$1r05$1 digitaldaemon.com...

 "Scott Egan" <scotte tpg.com.aux> wrote in message
 news:c75aun$1qhc$1 digitaldaemon.com...

 Thanks Phill.

 I got yours working even after I moved the 'globals g' definition to










 glbl.d file.

 The only diference I noted was that you used the module statement at










 top

 of the glbl.d file.

 So I included it at the top of my file and the problem went away.

 Now....why?!!!  The reat of my files are imported OK without module
 statements.

 I thought modulename = filename (less .d) if not specified.  Any












 it works either way with mine.
 I am not familiar with the way that the 'module'
 thing works, or whether you have to compile it
 in a similar way to Java's packages.

 Im waiting for Mathew's book. :o))



 What book? What're you talking about. ;)

 (As soon as I can get DTL done and out of the way, then maybe I can pay




 to some other, more potentially lucrative matters ... <G>)



Cant wait!

Ofcourse you would include a chapter(at least) on the DTL?

I have another OT question for you.
I have read articles by you a Walter in Dr Dobbs.
If one was to subscribe to a journal, which would you say would more likely
have the odd D article in it?
(Not including the D journal, because who knows when
that will surface.)

Thanks!
    Phill.



 May 07 2004



  parent reply "Matthew" <matthew.hat stlsoft.dot.org>  writes:


"Phill" <phill pacific.net.au> wrote in message
news:c7htjo$3057$1 digitaldaemon.com...

 "Matthew" <matthew.hat stlsoft.dot.org> wrote in message
 news:c7hdi7$29ok$1 digitaldaemon.com...

 "Phill" <phill pacific.net.au> wrote in message
 news:c75bcl$1r05$1 digitaldaemon.com...

 "Scott Egan" <scotte tpg.com.aux> wrote in message
 news:c75aun$1qhc$1 digitaldaemon.com...

 Thanks Phill.

 I got yours working even after I moved the 'globals g' definition to










 glbl.d file.

 The only diference I noted was that you used the module statement at










 top

 of the glbl.d file.

 So I included it at the top of my file and the problem went away.

 Now....why?!!!  The reat of my files are imported OK without module
 statements.

 I thought modulename = filename (less .d) if not specified.  Any












 it works either way with mine.
 I am not familiar with the way that the 'module'
 thing works, or whether you have to compile it
 in a similar way to Java's packages.

 Im waiting for Mathew's book. :o))



 What book? What're you talking about. ;)

 (As soon as I can get DTL done and out of the way, then maybe I can pay




 to some other, more potentially lucrative matters ... <G>)



 Cant wait!

 Ofcourse you would include a chapter(at least) on the DTL?



That's for sure. (Of course, nothing's sorted on the D book yet.)

FYI, I'm actually thinking that of discussing other STL incarnations in other
languages in my next book - "Extended STL". This'll fall naturally out of the
Ranges concept work, since it spans both C++ and D, and I've also been chatting
to some people about STL-like things in some other languages, but that's very
early stuff.


 I have another OT question for you.
 I have read articles by you a Walter in Dr Dobbs.




To the best of my knowledge, so far we've had the following so far:

WB: "The D Programming Language", DDJ, Feb 2002
MW: "C# Performance: Comparison with C, C++, D and Java, Parts 1 & 2", WDN,
Special Online Supplement, Fall 2003
MW: "Identity and Equality: Syntax and Semantics", CUJ, October 2003
MW: "Positive Integration #3: Mapping recls to D and Java", CUJ, January 2004
WB + MW: "Collection Enumeration: Loops, Iterators and Nested Functions", DDJ,
March 2004
WB: "Nested Functions", CUJ, May 2004

(I've also got a couple of Tech Tips in with DDJ that pertain to D which may see
the light of day sometime over the next 6-12 months.)


 If one was to subscribe to a journal, which would you say would more likely
 have the odd D article in it?



Despite the distribution shown above, it's far more likely that we'll be doing
more for Dr Dobb's than CUJ. In fact, we're planning to make a few proposals
very
soon, so I would hope you'd get some D-value out of a year's subscription to DDJ
if you made it now. ;)

But they're both great mags, so it depends on how much C++ vs everything-else
you
need.


 (Not including the D journal, because who knows when
 that will surface.)



Yeah, there are only so many hours in the day. Plus, for me, I've been living on
thin air and shoe leather for the last 18 months - that's the romantic life of
the penurious author <g> - so I favour submissions to paying journals when I
can.
Once I'm back in real work, I may well feel more than generously inclined
towards
TDJ, and aim my D submissions there.



 May 07 2004



  parent  "Phill" <phill pacific.net.au>  writes:


"Matthew" <matthew.hat stlsoft.dot.org> wrote in message
news:c7humu$31jj$1 digitaldaemon.com...

 "Phill" <phill pacific.net.au> wrote in message
 news:c7htjo$3057$1 digitaldaemon.com...

 "Matthew" <matthew.hat stlsoft.dot.org> wrote in message
 news:c7hdi7$29ok$1 digitaldaemon.com...

 "Phill" <phill pacific.net.au> wrote in message
 news:c75bcl$1r05$1 digitaldaemon.com...

 "Scott Egan" <scotte tpg.com.aux> wrote in message
 news:c75aun$1qhc$1 digitaldaemon.com...

 Thanks Phill.

 I got yours working even after I moved the 'globals g' definition
















 the

 glbl.d file.

 The only diference I noted was that you used the module statement
















 the

 top

 of the glbl.d file.

 So I included it at the top of my file and the problem went away.

 Now....why?!!!  The reat of my files are imported OK without
















 statements.

 I thought modulename = filename (less .d) if not specified.  Any












 it works either way with mine.
 I am not familiar with the way that the 'module'
 thing works, or whether you have to compile it
 in a similar way to Java's packages.

 Im waiting for Mathew's book. :o))



 What book? What're you talking about. ;)

 (As soon as I can get DTL done and out of the way, then maybe I can










 attention

 to some other, more potentially lucrative matters ... <G>)



 Cant wait!

 Ofcourse you would include a chapter(at least) on the DTL?



 That's for sure. (Of course, nothing's sorted on the D book yet.)

 FYI, I'm actually thinking that of discussing other STL incarnations in




 languages in my next book - "Extended STL". This'll fall naturally out of




 Ranges concept work, since it spans both C++ and D, and I've also been




 to some people about STL-like things in some other languages, but that's




 early stuff.


 I have another OT question for you.
 I have read articles by you a Walter in Dr Dobbs.




 To the best of my knowledge, so far we've had the following so far:

 WB: "The D Programming Language", DDJ, Feb 2002
 MW: "C# Performance: Comparison with C, C++, D and Java, Parts 1 & 2",




 Special Online Supplement, Fall 2003
 MW: "Identity and Equality: Syntax and Semantics", CUJ, October 2003
 MW: "Positive Integration #3: Mapping recls to D and Java", CUJ, January




 WB + MW: "Collection Enumeration: Loops, Iterators and Nested Functions",




 March 2004
 WB: "Nested Functions", CUJ, May 2004

 (I've also got a couple of Tech Tips in with DDJ that pertain to D which




 the light of day sometime over the next 6-12 months.)


 If one was to subscribe to a journal, which would you say would more







 have the odd D article in it?



 Despite the distribution shown above, it's far more likely that we'll be




 more for Dr Dobb's than CUJ. In fact, we're planning to make a few




 soon, so I would hope you'd get some D-value out of a year's subscription




 if you made it now. ;)

 But they're both great mags, so it depends on how much C++ vs




 need.


 (Not including the D journal, because who knows when
 that will surface.)



 Yeah, there are only so many hours in the day. Plus, for me, I've been




 thin air and shoe leather for the last 18 months - that's the romantic




 the penurious author <g> - so I favour submissions to paying journals when




 Once I'm back in real work, I may well feel more than generously inclined




 TDJ, and aim my D submissions there.



Thanks Mathew!

DDJ it shall be then.

Phill.



 May 08 2004



prev sibling  parent reply J C Calvarese <jcc7 cox.net>  writes:


Scott Egan wrote:

 Hi,
 
 In another thread I mentioned that I would convert my game to D.  Well all
 was good until step 3 of 45672345.
 
 I looked at Walter's empire windows code and noticed that he wrapped the
 globals in a struct - so I did too.
 
 (This is when I decided that I had an issue with 'with').
 
 Now here's where my lack of D savvy will show.  When I went to refer to the
 struct in an other module I simply imported the module that the structure
 was declared in.  It compiles but won't link.
 
 I get 'Error 42: Symbol Undefined _D4iced6globalS4iced7globals' in the
 importing obj module.  I've tried every combination of export, extern I
 could think of; although I wouldn't have expected to need to.  I also tried
 declaring the variable public, still no luck.
 
 Any thoughts would be appreciated.
 
 The structure definition and declaration are below.
 
 struct globals {
  int Score;
  bit Random;
  HDC hDCVid, hDCScrn, hDCMem;
  HINSTANCE Instant;
  HWND hWndStat, hWndEdit, hWndIce;
  char GameName[];
  int Lives, Screen, Stands, CountDown, Diamonds, TimeOut, Loaded, xScr,
 yScr, yText, yChar, xChar, Width, Height;
  byte SCRNX, SCRNY, retX, retY, GoodX, GoodY, HIT;
  byte[64][64] Scrn;
 };
 
 globals global;




If you have two files: main.d and imports.d, you probably need to put 
both of them in the compile line:

dmd main.d imports.d

I'm guessing this will solve your problem.


Another way of solving this problem is to compile each separately:

dmd imports.d -c
dmd main.d imports.obj

-- 
Justin
http://jcc_7.tripod.com/d/



 May 02 2004



  parent reply "Scott Egan" <scotte tpg.com.aux>  writes:


I'm using DIDE.

It compiles fine, I just get a linker error.



"J C Calvarese" <jcc7 cox.net> wrote in message
news:c73aoq$1s63$1 digitaldaemon.com...

 Scott Egan wrote:

 Hi,

 In another thread I mentioned that I would convert my game to D.  Well







 was good until step 3 of 45672345.

 I looked at Walter's empire windows code and noticed that he wrapped the
 globals in a struct - so I did too.

 (This is when I decided that I had an issue with 'with').

 Now here's where my lack of D savvy will show.  When I went to refer to







 struct in an other module I simply imported the module that the







 was declared in.  It compiles but won't link.

 I get 'Error 42: Symbol Undefined _D4iced6globalS4iced7globals' in the
 importing obj module.  I've tried every combination of export, extern I
 could think of; although I wouldn't have expected to need to.  I also







 declaring the variable public, still no luck.

 Any thoughts would be appreciated.

 The structure definition and declaration are below.

 struct globals {
  int Score;
  bit Random;
  HDC hDCVid, hDCScrn, hDCMem;
  HINSTANCE Instant;
  HWND hWndStat, hWndEdit, hWndIce;
  char GameName[];
  int Lives, Screen, Stands, CountDown, Diamonds, TimeOut, Loaded, xScr,
 yScr, yText, yChar, xChar, Width, Height;
  byte SCRNX, SCRNY, retX, retY, GoodX, GoodY, HIT;
  byte[64][64] Scrn;
 };

 globals global;




 If you have two files: main.d and imports.d, you probably need to put
 both of them in the compile line:

 dmd main.d imports.d

 I'm guessing this will solve your problem.


 Another way of solving this problem is to compile each separately:

 dmd imports.d -c
 dmd main.d imports.obj

 -- 
 Justin
 http://jcc_7.tripod.com/d/






 May 03 2004



 next sibling parent reply "Phill" <phill pacific.net.au>  writes:


"Scott Egan" <scotte tpg.com.aux> wrote in message
news:c759sl$1onr$1 digitaldaemon.com...

 I'm using DIDE.

 It compiles fine, I just get a linker error.



When you made the module with the struct in it, did
you go:
File-> New File Into Project
or just
File-> New
?

Phill



 May 03 2004



  parent  "Scott Egan" <scotte tpg.com.aux>  writes:


Don't worry it's in the project (file new into project)


"Phill" <phill pacific.net.au> wrote in message
news:c75b29$1qlt$1 digitaldaemon.com...

 "Scott Egan" <scotte tpg.com.aux> wrote in message
 news:c759sl$1onr$1 digitaldaemon.com...

 I'm using DIDE.

 It compiles fine, I just get a linker error.



 When you made the module with the struct in it, did
 you go:
 File-> New File Into Project
 or just
 File-> New
 ?

 Phill






 May 03 2004



prev sibling  parent reply J C Calvarese <jcc7 cox.net>  writes:


Scott Egan wrote:

 I'm using DIDE.



Do you have a command line? Have you tried it?


 
 It compiles fine, I just get a linker error.



Sorry I was unclear, but I'm talking about a linker error. If both files 
aren't compiled, I don't think it will link. Your problem might be 
elsewhere, but without entire files I can only guess what the problem is.


If you haven't got it to work yet, you have some options:

1) Post the whole files of source code so that the rest of us aren't 
fumbling around in the dark.

2) Try compiling at the command line. Or by using a batch file. I have 
nothing against using DIDE; I use it all the time for editing files. But 
that doesn't prevent me from using the commmand line, batch files, or 
makefiles. I'm flexible.



 "J C Calvarese" <jcc7 cox.net> wrote in message
 news:c73aoq$1s63$1 digitaldaemon.com...
 

Scott Egan wrote:


Hi,

In another thread I mentioned that I would convert my game to D.  Well






 all
 

was good until step 3 of 45672345.

I looked at Walter's empire windows code and noticed that he wrapped the
globals in a struct - so I did too.

(This is when I decided that I had an issue with 'with').

Now here's where my lack of D savvy will show.  When I went to refer to






 the
 

struct in an other module I simply imported the module that the






 structure
 

was declared in.  It compiles but won't link.

I get 'Error 42: Symbol Undefined _D4iced6globalS4iced7globals' in the
importing obj module.  I've tried every combination of export, extern I
could think of; although I wouldn't have expected to need to.  I also






 tried
 

declaring the variable public, still no luck.

Any thoughts would be appreciated.

The structure definition and declaration are below.

struct globals {
 int Score;
 bit Random;
 HDC hDCVid, hDCScrn, hDCMem;
 HINSTANCE Instant;
 HWND hWndStat, hWndEdit, hWndIce;
 char GameName[];
 int Lives, Screen, Stands, CountDown, Diamonds, TimeOut, Loaded, xScr,
yScr, yText, yChar, xChar, Width, Height;
 byte SCRNX, SCRNY, retX, retY, GoodX, GoodY, HIT;
 byte[64][64] Scrn;
};

globals global;




If you have two files: main.d and imports.d, you probably need to put
both of them in the compile line:

dmd main.d imports.d

I'm guessing this will solve your problem.


Another way of solving this problem is to compile each separately:

dmd imports.d -c
dmd main.d imports.obj

-- 
Justin
http://jcc_7.tripod.com/d/



 
 




-- 
Justin
http://jcc_7.tripod.com/d/



 May 03 2004



  parent reply "Scott Egan" <scotte tpg.com.aux>  writes:


Thanks,

after looking at Phills source, I noticed that the importeded module had a
specific module statement, so I included on in mine.  That fixed the
problem.

All files were compiling and the only thing I can thing of is that I named
the file in uppercase.




"J C Calvarese" <jcc7 cox.net> wrote in message
news:c77ap6$1r4g$1 digitaldaemon.com...

 Scott Egan wrote:

 I'm using DIDE.



 Do you have a command line? Have you tried it?


 It compiles fine, I just get a linker error.



 Sorry I was unclear, but I'm talking about a linker error. If both files
 aren't compiled, I don't think it will link. Your problem might be
 elsewhere, but without entire files I can only guess what the problem is.


 If you haven't got it to work yet, you have some options:

 1) Post the whole files of source code so that the rest of us aren't
 fumbling around in the dark.

 2) Try compiling at the command line. Or by using a batch file. I have
 nothing against using DIDE; I use it all the time for editing files. But
 that doesn't prevent me from using the commmand line, batch files, or
 makefiles. I'm flexible.



 "J C Calvarese" <jcc7 cox.net> wrote in message
 news:c73aoq$1s63$1 digitaldaemon.com...


Scott Egan wrote:


Hi,

In another thread I mentioned that I would convert my game to D.  Well






 all


was good until step 3 of 45672345.

I looked at Walter's empire windows code and noticed that he wrapped













globals in a struct - so I did too.

(This is when I decided that I had an issue with 'with').

Now here's where my lack of D savvy will show.  When I went to refer to






 the


struct in an other module I simply imported the module that the






 structure


was declared in.  It compiles but won't link.

I get 'Error 42: Symbol Undefined _D4iced6globalS4iced7globals' in the
importing obj module.  I've tried every combination of export, extern I
could think of; although I wouldn't have expected to need to.  I also






 tried


declaring the variable public, still no luck.

Any thoughts would be appreciated.

The structure definition and declaration are below.

struct globals {
 int Score;
 bit Random;
 HDC hDCVid, hDCScrn, hDCMem;
 HINSTANCE Instant;
 HWND hWndStat, hWndEdit, hWndIce;
 char GameName[];
 int Lives, Screen, Stands, CountDown, Diamonds, TimeOut, Loaded, xScr,
yScr, yText, yChar, xChar, Width, Height;
 byte SCRNX, SCRNY, retX, retY, GoodX, GoodY, HIT;
 byte[64][64] Scrn;
};

globals global;




If you have two files: main.d and imports.d, you probably need to put
both of them in the compile line:

dmd main.d imports.d

I'm guessing this will solve your problem.


Another way of solving this problem is to compile each separately:

dmd imports.d -c
dmd main.d imports.obj

-- 
Justin
http://jcc_7.tripod.com/d/







 -- 
 Justin
 http://jcc_7.tripod.com/d/






 May 04 2004



  parent  J C Calvarese <jcc7 cox.net>  writes:


Scott Egan wrote:

 Thanks,
 
 after looking at Phills source, I noticed that the importeded module had a
 specific module statement, so I included on in mine.  That fixed the
 problem.
 
 All files were compiling and the only thing I can thing of is that I named
 the file in uppercase. 



I'm glad to hear that.

-- 
Justin
http://jcc_7.tripod.com/d/



 May 04 2004