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digitalmars.D - D not able to link .o files

reply meldolion <pi marsinvasion.de> writes:
I tried to include a external c function created by MinGW in a D source.

so I got a helloworld.o file

when i want to compile my main.d module with following command:

dmd main.d helloworld.o 
I get the error
Error: unrecognized file extension o

How can I solve that problem

thx for help
meldolion
Feb 25 2008
parent reply Tim Healey <leikeze gmail.com> writes:
meldolion wrote:

 I tried to include a external c function created by MinGW in a D source.
 
 so I got a helloworld.o file
 
 when i want to compile my main.d module with following command:
 
 dmd main.d helloworld.o 
 I get the error
 Error: unrecognized file extension o
 
 How can I solve that problem
 
 thx for help
 meldolion



Different compilers use different object formats. It would probably be
easier to either compile the C program with Digital Mars C and continue
using DMD or compile the D program with GDC and continue using MinGW.
Feb 25 2008
parent reply Bill Baxter <dnewsgroup billbaxter.com> writes:
Tim Healey wrote:

 meldolion wrote:

 I tried to include a external c function created by MinGW in a D source.

 so I got a helloworld.o file

 when i want to compile my main.d module with following command:

 dmd main.d helloworld.o I get the error
 Error: unrecognized file extension o

 How can I solve that problem

 thx for help
 meldolion



 Different compilers use different object formats. It would probably be
 easier to either compile the C program with Digital Mars C and continue
 using DMD or compile the D program with GDC and continue using MinGW.



BTW, if you got your DMD installation from DigitalMars.com (and not from 
the Tango folks) then you already have a copy of "dmc" the DigitalMars 
C++ compiler.

Additionally, one way to get around the object file differences is to 
build a DLL, since the DLL format is standardized.

Given a MinGW library called libThing.a you can build a shared lib with 
a crazy command line like this:

gcc -mno-cygwin -shared -o Thing.dll \
    -Wl,--out-implib=Thing_mingw.lib \
    -Wl,--export-all-symbols -Wl,--allow-multiple-definition \
    -Wl,--enable-auto-import -Wl,--whole-archive libThing.a \
    -Wl,--no-whole-archive [libs libThing uses internally]

That'll create Thing.dll and an import lib called Thing_mingw.lib.
Ignore Thing_mingw.lib, and create a new DMD-compatible import lib using:

     implib /system Thingdll.lib Thing.dll

(implib should be in the dm/bin dir)
--bb
Feb 25 2008
parent reply Jacob Carlborg <doobnet gmail.com> writes:
Bill Baxter wrote:

 That'll create Thing.dll and an import lib called Thing_mingw.lib.
 Ignore Thing_mingw.lib, and create a new DMD-compatible import lib using:
 
     implib /system Thingdll.lib Thing.dll
 
 (implib should be in the dm/bin dir)
 --bb



I have never seen implib in either the dmd zip or dmc
Feb 25 2008
parent reply Bill Baxter <dnewsgroup billbaxter.com> writes:
Jacob Carlborg wrote:

 Bill Baxter wrote:

 That'll create Thing.dll and an import lib called Thing_mingw.lib.
 Ignore Thing_mingw.lib, and create a new DMD-compatible import lib using:

     implib /system Thingdll.lib Thing.dll

 (implib should be in the dm/bin dir)
 --bb



 I have never seen implib in either the dmd zip or dmc



Oops.  Maybe you need to get the "Basic Utilities Package" then.

I should read my README.txt more closely next time ;-).  There I clearly 
state:
"""
Next you need to create a D-compatible import lib from that using
'implib' in the "Basic Utilties Package":
http://www.digitalmars.com/download/freecompiler.html
--> http://ftp.digitalmars.com/bup.zip
"""

:-)

--bb
Feb 25 2008
parent reply Jacob Carlborg <doobnet gmail.com> writes:
Bill Baxter wrote:

 Jacob Carlborg wrote:

 Bill Baxter wrote:

 That'll create Thing.dll and an import lib called Thing_mingw.lib.
 Ignore Thing_mingw.lib, and create a new DMD-compatible import lib 
 using:

     implib /system Thingdll.lib Thing.dll

 (implib should be in the dm/bin dir)
 --bb



 I have never seen implib in either the dmd zip or dmc



 Oops.  Maybe you need to get the "Basic Utilities Package" then.
 
 I should read my README.txt more closely next time ;-).  There I clearly 
 state:
 """
 Next you need to create a D-compatible import lib from that using
 'implib' in the "Basic Utilties Package":
 http://www.digitalmars.com/download/freecompiler.html
 --> http://ftp.digitalmars.com/bup.zip
 """
 
 :-)
 
 --bb



There they are, that will make a lot of things easier :)
Feb 25 2008
parent reply meldolion <pi marsinvasion.d> writes:
thx for answering

i will try it
Feb 26 2008
parent meldolion <pi marsinvasion.d> writes:
another information is written here.

http://www.digitalmars.com/d/1.0/faq.html#omf
Feb 26 2008