Can't link .res file (from windres) using i686-pc-mingw32-g++

Can't link .res file (from windres) using i686-pc-mingw32-g++

[Jim Reisert AD1C]

I  have a 64-bit Cygwin environment.  I'm trying to compile a 32-bit
(target) Windows program using i686-pc-mingw32-g++

# i686-pc-mingw32-g++ -g -Wall -Iinclude -I../../library/include   -c
-o NPOTAdlg.o NPOTAdlg.cpp
# windres -Iinclude res/NPOTAdlg.rc -O coff -o res/NPOTAdlg.res
# i686-pc-mingw32-g++ -s -mwindows -static-libgcc -static-libstdc++
-lwininet  NPOTA.o NPOTAdlg.o res/NPOTAdlg.res ../../library/library.a
/usr/i686-pc-mingw32/sys-root/mingw/lib/libwininet.a   -o NPOTA

But I get this error on the link (last) step:

  res/NPOTAdlg.res: file not recognized: File format not recognized

This program is a clone of another program I wrote a couple of years
ago (I wanted to re-use the Windows framework I had developed).
However, at that time, I was using 32-bit Cygwin, not 64-bit Cygwin.

Is there a work-around for this, other than re-creating a 32-bit
Cygwin environment?

Thanks - Jim

-- 
Jim Reisert AD1C, <jjreisert@alum.mit.edu>, http://www.ad1c.us

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Re: Can't link .res file (from windres) using i686-pc-mingw32-g++

[Mark Geisert]

Jim Reisert AD1C wrote:
> I  have a 64-bit Cygwin environment.  I'm trying to compile a 32-bit
> (target) Windows program using i686-pc-mingw32-g++
>
> # i686-pc-mingw32-g++ -g -Wall -Iinclude -I../../library/include   -c
> -o NPOTAdlg.o NPOTAdlg.cpp
> # windres -Iinclude res/NPOTAdlg.rc -O coff -o res/NPOTAdlg.res
> # i686-pc-mingw32-g++ -s -mwindows -static-libgcc -static-libstdc++
> -lwininet  NPOTA.o NPOTAdlg.o res/NPOTAdlg.res ../../library/library.a
> /usr/i686-pc-mingw32/sys-root/mingw/lib/libwininet.a   -o NPOTA
>
> But I get this error on the link (last) step:
>
>    res/NPOTAdlg.res: file not recognized: File format not recognized
>
> This program is a clone of another program I wrote a couple of years
> ago (I wanted to re-use the Windows framework I had developed).
> However, at that time, I was using 32-bit Cygwin, not 64-bit Cygwin.
>
> Is there a work-around for this, other than re-creating a 32-bit
> Cygwin environment?

Just a guess: your 64-bit windres is generating a 64-bit .res file that the 
32-bit g++ can't grok.  Look at 'windres -h'.  There's a "-F" == "--target" flag 
that can specify a target type.  I would try adding "-F pe-i386" after the "-O 
coff" on your command.  If windres doesn't accept both -O and -F, try leaving 
off the "-O coff" and just specify the -F flag and value.  Good luck.

..mark

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RE: Can't link .res file (from windres) using i686-pc-mingw32-g++

[Tony Kelman]

> Jim Reisert AD1C wrote:
>> I have a 64-bit Cygwin environment. I'm trying to compile a 32-bit
>> (target) Windows program using i686-pc-mingw32-g++
>>
>> # i686-pc-mingw32-g++ -g -Wall -Iinclude -I../../library/include -c
>> -o NPOTAdlg.o NPOTAdlg.cpp
>> # windres -Iinclude res/NPOTAdlg.rc -O coff -o res/NPOTAdlg.res
>> # i686-pc-mingw32-g++ -s -mwindows -static-libgcc -static-libstdc++
>> -lwininet NPOTA.o NPOTAdlg.o res/NPOTAdlg.res ../../library/library.a
>> /usr/i686-pc-mingw32/sys-root/mingw/lib/libwininet.a -o NPOTA

Or use i686-pc-mingw32-windres? If that doesn't exist, I know there is
one in mingw-w64 under the name i686-w64-mingw32-windres.

-Tony

 		 	   		  
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Re: Can't link .res file (from windres) using i686-pc-mingw32-g++

[Jim Reisert AD1C]

On Wed, Feb 24, 2016 at 9:29 PM, Mark Geisert wrote:

> Just a guess: your 64-bit windres is generating a 64-bit .res file that the
> 32-bit g++ can't grok.  Look at 'windres -h'.  There's a "-F" == "--target"
> flag that can specify a target type.  I would try adding "-F pe-i386" after
> the "-O coff" on your command.  If windres doesn't accept both -O and -F,
> try leaving off the "-O coff" and just specify the -F flag and value.

Thanks, Mark, that worked! I assumed that -O coff would "do the right
thing" by itself.  I did not realize that "format" and "target" were
independent.  I finally read somewhere that by default, windres picks
the target that is listed first when getting help via "-h".  In my
case that was pe-x86-64, which was wrong for what I wanted to do.

- Jim

-- 
Jim Reisert AD1C, <jjreisert@alum.mit.edu>, http://www.ad1c.us

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