mingw-users Mailing List for MinGW - Minimalist GNU for Windows

On 2009-09-30 13:24Z, Wolfgang Pausch wrote:
> 
> I currently have the task of writing a application using C++ and Qt
> 4.5 under Windows.  I want to do this under Eclipse using Mingw.  I
> use the Qt integration of eclipse using the mingw toolchain, so
> hopefully eclipse has chosen the right tools for my build chain ;-)

Sounds like a third party is repackaging the MinGW toolchain.
If it works, great. But if you run into problems, try building
a simple self-contained test case at the command line (not in
an IDE) first. That way, if it doesn't work, you can copy and
paste the exact commands here, and we'll be able to figure out
how to fix it.

> I need to use windows.h, as I need to have control over multiple
> keyboards connected to the same computer.  If I get it right,
> windows.h (and the corresponding libraries) is included in mingw?

MinGW includes the header. The operating system provides the
library.

> Under this assumption, I added a #include <windows.h> to my example
> program.  The compiler doesn´t complain about not finding the
> header, however, when it comes to the windows.h-related code, it
> complains about not finding the symbols.

All of them? Or only some?

Try a minimal console program that #includes only <windows.h>
and calls only MessageBox(). See whether you can compile and
link that; try doing so at the command line first. If it fails,
copy and paste the exact command line here.

> I also installed Microsoft Visual Studio 2008 Express and Microsoft
> Windows SDK.  Do I need this?

No. Don't try to combine it with MinGW.

Hello,

I currently have the task of writing a application using C++ and Qt 4.5 under Windows.  I want to do this under Eclipse using Mingw.  I use the Qt integration of eclipse using the mingw toolchain, so hopefully eclipse has chosen the right tools for my build chain ;-)

I need to use windows.h, as I need to have control over multiple keyboards connected to the same computer.  If I get it right, windows.h (and the corresponding libraries) is included in mingw?  

Under this assumption, I added a #include <windows.h> to my example program.  The compiler doesn´t complain about not finding the header, however, when it comes to the windows.h-related code, it complains about not finding the symbols.

I also installed Microsoft Visual Studio 2008 Express and Microsoft Windows SDK.  Do I need this?  If I try to add the include-path of the sdk (where especially windows.h is located) to QMakes includepath, I get thousands of errors caused by the mere fact that I include windows.h, I don´t even need to use some windows.h-related symbol to get those errors :-(       Note that I get all errors I talked about from the compiler, not the linker.  I know that I will probably have to link against some dlls also, but so far I would be glad if I would just make the compiler working...

I should note that I am a rather experienced programmer, but so far only under Java and/or in the Linux world.  So, the fine-tuning related to mingw, choosing the right make / compiler / etc., dealing with windows.h is new for me. 

Can anyone give me some hints, or point me to some documentation I didn´t found yet, dealing with how to use windows.h and the related stuff under mingw?

Thanks!

Wolfgang

PS: I can add some compiler output, if needed.
-- 
Jetzt kostenlos herunterladen: Internet Explorer 8 und Mozilla Firefox 3.5 -
sicherer, schneller und einfacher! http://portal.gmx.net/de/go/chbrowser

Hi Greg

thanks for your suggestions, i tried to compile it on Comeau and got this message:

Your Comeau C/C++ test results are as follows:
Comeau C/C++ 4.3.9 (Mar 27 2007 17:24:47) for ONLINE_EVALUATION_BETA2
Copyright 1988-2007 Comeau Computing.  All rights reserved.
MODE:non-strict warnings C99 noC++0x_extensions

"ComeauTest.c", line 6: warning: typedef name has already been declared (with same
          type)
  }MyStruct;
   ^

-Padam


In non-strict mode,
with -tused,
Compile succeeded (but remember, the Comeau online compiler does not link).

Compiled with C++0x extensions DISabled.


--- On Wed, 30/9/09, Greg Chicares <gch...@sb...> wrote:

From: Greg Chicares <gch...@sb...>
Subject: Re: [Mingw-users] Error: redefinition of typedef
To: "MinGW Users List" <min...@li...>
Date: Wednesday, 30 September, 2009, 3:35 PM

On 2009-09-30 05:29Z, padam chamoli wrote:
> 
> I am getting this error: 
>   test.c:6: error: redefinition of typedef 'MyStruct' 
>   test.c:3: error: previous declaration of 'MyStruct' was here 

You can't redefine a typedef in standard C. See, for example:

http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/bfe0c8d9d631afd9/b786d09be50faa17

http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/73d1249c78f99dd3/a409a5a5c0be0d84

> I am able to succesfully compile the same using Win32 and RVCT22 compilers. 

If you want a reputable second opinion, paste your code here:
  http://www.comeaucomputing.com/tryitout

Some compilers may allow typedef redefinition as an extension.
But code that relies on such an extension is not portable.

------------------------------------------------------------------------------
Come build with us! The BlackBerry&reg; Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay 
ahead of the curve. Join us from November 9-12, 2009. Register now!
http://p.sf.net/sfu/devconf
_______________________________________________
MinGW-users mailing list
Min...@li...

This list observes the Etiquette found at 
http://www.mingw.org/Mailing_Lists.
We ask that you be polite and do the same.

Most annoying abuses are:
1) Top posting
2) Thread hijacking
3) HTML/MIME encoded mail
4) Improper quoting
5) Improper trimming
_______________________________________________
You may change your MinGW Account Options or unsubscribe at:
https://lists.sourceforge.net/lists/listinfo/mingw-users



      Connect more, do more and share more with Yahoo! India Mail. Learn more. http://in.overview.mail.yahoo.com/

On 2009-09-30 05:29Z, padam chamoli wrote:
> 
> I am getting this error: 
>   test.c:6: error: redefinition of typedef 'MyStruct' 
>   test.c:3: error: previous declaration of 'MyStruct' was here 

You can't redefine a typedef in standard C. See, for example:

http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/bfe0c8d9d631afd9/b786d09be50faa17

http://groups.google.com/group/comp.lang.c.moderated/browse_thread/thread/73d1249c78f99dd3/a409a5a5c0be0d84

> I am able to succesfully compile the same using Win32 and RVCT22 compilers. 

If you want a reputable second opinion, paste your code here:
  http://www.comeaucomputing.com/tryitout

Some compilers may allow typedef redefinition as an extension.
But code that relies on such an extension is not portable.

padam chamoli wrote:

> typedef struct MyStruct MyStruct; 
> typedef struct MyStruct { 
>  int x; 
> }MyStruct; 

>   test.c:6: error: redefinition of typedef 'MyStruct' 

I'm not an expert, but this does not seem to be MinGW specific.  GCC in
general does that.  For example, your test.c program does not compile
under Ubuntu 9.04 using GCC 4.3.3 either.

> Is it possible to suppress these errors (some cmd line option that
> minGW supports)? ... Is there any solution for this? Is it a bug in
> MinGW ?

I don't think this is a bug in MinGW.  I think it is a deliberate design
choice in GCC.  How a C compiler should handle the existence of multiple
typedefs of the same name was left undefined in K&R, and I am not sure
it is clearly defined in C99 either.  So (as I understand it) compiler
writers do whatever they want to, in this situation.

Possible approaches to try:

(1) You may be able to get around this issue by removing the first
occurrence of the typedef, and then moving the second "real" typedef to
the location where the first one was (probably a header file, in your
real code).

(2) Alternatively, you could consider removing the use of typedef
entirely, and compiling with g++ instead of gcc, since in C++ the
typdefs are unnecessary :)   So (to modify your example)

  struct MyStruct;
  struct MyStruct {
    int x;
  } MyStruct;

is valid C++ , and the mingw g++ compiler will accept it, as will GCC
g++ compilers in general.

Jonathan

I am trying to compile the below code using mingw. 

----test.c-------------------------------------------------- 
#include "stdio.h" 

typedef struct MyStruct MyStruct; 
typedef struct MyStruct { 
 int x; 
}MyStruct; 

int main() 
{ 
   printf(" main"); 
   return 0; 
} 
----------------------------------------------------------- 

I am getting this error: 
  test.c:6: error: redefinition of typedef 'MyStruct' 
  test.c:3: error: previous declaration of 'MyStruct' was here 


Is it possible to suppress these errors (some cmd line option that minGW supports)? 

I am able to succesfully compile the same using Win32 and RVCT22 compilers. 

Is there any solution for this? Is it a bug in MinGW ? 

Thanks in advance 
Padam




      Try the new Yahoo! India Homepage. Click here. http://in.yahoo.com/trynew

I have installed a package at c:/tcl/lib/net-snmp.

While working with config under MSYS I determined that it wanted the include
files at
c:/tcl/include/net-snmp. Now configure runs to completion. However make is
not happy because an include file is missing:
net-snmp-config.h. There is an .in file in this directory:
net-snmp-config.h.in. I am trying to use it to generate the needed .h file.

I ran autoconf from MSYS and gave it the file name as an argument. It ran
but no file was generated: autoconf net-snmp-config.h.in. If I try
autoconf/configure it reports no such command. It also will not accept
"--prefix=/mingw". How should I go about generating the needed .h file?

thanx

>
>
> [Aside: Blatant plug for my own .bat script: my recently announced
> setup-mingw.bat installer does this for you automagically :)
> End of Aside]
>
>
Found it and installed it. Definitely made things better.

Thanx!

Paulo Flabiano Smorigo wrote:
> Hi Everybody,
>
> I have the following windows resource:
>
> 1 VERSIONINFO
> FILEVERSION     1,0,0,0
> PRODUCTVERSION  0,0,0,0
> BEGIN
> 	BLOCK "StringFileInfo"
> 	BEGIN
> 		BLOCK "000004b0"
> 		BEGIN
> 			VALUE "FileDescription", "My App\0"
> 			VALUE "FileVersion",SVN_REV
>
> i586-mingw32msvc-windres: windres.rc:10: syntax error
>   
Hi,

the way I read it, it's SVN_REV that is undefined; that's the way
mingw-windres reports the error;
you need to #include [at the top of windres.rc] the header file
["windres.h" for instance] that contains
#define SVN_REV 77777
[for instance]

Best regards

Mark

http://www.halloit.com

Key ID 046B65CF

> How can I select which runtime (e.g. msvcr80.dll instead of msvcrt.dll)
> should be used?

Appears this might help:
http://www.mingw.org/wiki/SpecsFileHOWTO

-r

How can I select which runtime (e.g. msvcr80.dll instead of msvcrt.dll)
should be used?

Elmar

Alejandro A. Ortiz Bernardin schrieb:
> Hello there!

> The problem is that I need the ";" since I have to execute another makefile
> which will be inside SRCDIR:

You can try make -C $(SRCDIR) or $(MAKE) -C $(SRCDIR)..

HTH
Rudi

-- 
GPG encrypted mails preferred.
GPG verschlüsselte Mails bevorzugt.
---> http://chaosradio.ccc.de/media/ds/ds085.pdf Seite 20 <----

 <alpine.LRH.2.00.0909271631220.8480@localhost>
Content-Type: text/plain; charset="Windows-1252"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0



>
> On Sat=2C 26 Sep 2009=2C John Brown wrote:
>> Paulo Flabiano Florigo wrote:
>>>
>>> To compile I use the command:
>>> i586-mingw32msvc-windres windres.rc -O coff -DSVN_REV=3D365M windres.o
>>>
>>> But it returns the error:
>>> i586-mingw32msvc-windres: windres.rc:10: syntax error
>>>
>>> What I'm doing wrong?
>>
>> See http://msdn.microsoft.com/en-us/library/ee125663%28VS.85%29.aspx
>
> Microsoft Speech API? How does that help?
>
> Cheers=2C Chris.
> --

Oops! I don't know what happened=2C but it was supposed to be
the Resources reference in MSDN.

Win32 and COM Development -> User Interface -> Resource Compiler etc

http://msdn.microsoft.com/en-us/library/aa381043(VS.85).aspx

Regards=2C
John Brown.
 		 	   		  =0A=
_________________________________________________________________=0A=
Hotmail=AE has ever-growing storage! Don=92t worry about storage limits.=0A=
http://windowslive.com/Tutorial/Hotmail/Storage?ocid=3DTXT_TAGLM_WL_HM_Tuto=
rial_Storage_062009=

On Sat, 26 Sep 2009, John Brown wrote:
> Paulo Flabiano Florigo wrote:
>>
>> To compile I use the command:
>> i586-mingw32msvc-windres windres.rc -O coff -DSVN_REV=365M windres.o
>>
>> But it returns the error:
>> i586-mingw32msvc-windres: windres.rc:10: syntax error
>>
>> What I'm doing wrong?
>
> See http://msdn.microsoft.com/en-us/library/ee125663%28VS.85%29.aspx

Microsoft Speech API? How does that help?

Cheers, Chris.
-- 
_____ __     _
\  __/ / ,__(_)_  | Chris Wilson <chr...@qw...> Cambs UK |
/ (_/ ,\/ _/ /_ \ | Security/C/C++/Java/Ruby/Perl/SQL Developer |
\__/_/_/_//_/___/ | We are GNU : free your mind & your software |

I am running MSys and mingw and am wanting to build an SWF file from
actionscript. I have the Flex SDK and Java libraries installed on
windows, but am having trouble figuring out how to configure MingW to
point to these libraries.

I even tried copying the FlexSDK into the Mingw /bin directory and
that gets the build to start, but it bombs out saying it cannot find
the flex config file:

"Error: unable to open 'd;d:\mingw\bin\Flex\sdk_4\bin\..\frameworks/fle
x-config.xml'"

Has anyone tried this, or have ideas on linking in these libraries?

-- 
Jon

On 2009-09-27 12:50Z, Elmar Haneke wrote:
> I have a problem with an Protection-Fault caused by mingwm10.dll in an
> Application running on Vista.
> 
> Ist there an known incompatibility?

Make sure you're using the version of 'mingwm10.dll' that was
provided with the compiler. See:
  http://thread.gmane.org/gmane.comp.gnu.mingw.user/30094/focus=30105
  http://article.gmane.org/gmane.comp.gnu.mingw.user/10753/
If that doesn't solve the problem, then you'll need to provide
more information. Even though the protection fault occurs in
the dll, the real cause might be a defective application.

I have a problem with an Protection-Fault caused by mingwm10.dll in an
Application running on Vista.

Ist there an known incompatibility?

Elmar

I am running MSys and mingw and am wanting to build an SWF file from
actionscript. I have the Flex SDK and Java libraries installed on
windows, but am having trouble figuring out how to configure MingW to
point to these libraries.

I even tried copying the FlexSDK into the Mingw /bin directory and
that gets the build to start, but it bombs out saying it cannot find
the flex config file:

"Error: unable to open 'd;d:\mingw\bin\Flex\sdk_4\bin\..\frameworks/fle
x-config.xml'"

Has anyone tried this, or have ideas on linking in these libraries?

-- Jon

Paulo Flabiano Florigo wrote:

>
> Hi Everybody,
>
> I have the following windows resource:
>
> 1 VERSIONINFO
> FILEVERSION 1,0,0,0
> PRODUCTVERSION 0,0,0,0
> BEGIN
> BLOCK "StringFileInfo"
> BEGIN
> BLOCK "000004b0"
> BEGIN
> VALUE "FileDescription", "My App\0"
> VALUE "FileVersion",SVN_REV
> VALUE "InternalName", "myapp\0"
> VALUE "ProductVersion", "1.0\0"
> END
> END
>
> BLOCK "VarFileInfo"
> BEGIN
> VALUE "Translation", 0, 0x04b0
> END
> END
>
> To compile I use the command:
> i586-mingw32msvc-windres windres.rc -O coff -DSVN_REV=365M windres.o
>
> But it returns the error:
> i586-mingw32msvc-windres: windres.rc:10: syntax error
>
> What I'm doing wrong?
>

See http://msdn.microsoft.com/en-us/library/ee125663%28VS.85%29.aspx

Regards,
Alias John Brown.
 		 	   		  
_________________________________________________________________
Hotmail® has ever-growing storage! Don’t worry about storage limits.
http://windowslive.com/Tutorial/Hotmail/Storage?ocid=TXT_TAGLM_WL_HM_Tutorial_Storage_062009

> In the piece of makefile below (which actually does nothing), why cd
> $(SRCDIR) does not find the directory if I put ";" after (SRCDIR)? On the
> contrary, if I remove the ";" it will find it. The makefile works fine in
> Linux and Cygwin, but not in MinGW.
[...]
> clean :     
>           cd $(SRCDIR); make clean

>> Perhaps you're using CMD.EXE, and have the problem described here:
>>  http://lists.gnu.org/archive/html/make-w32/2009-09/msg00016.html
>> If not, then say what shell you're using, and exactly what failing
>> behavior you observe.

Yes, that was the problem. Thanks.

-a

On 2009-09-25 19:32Z, Alejandro A. Ortiz Bernardin wrote:
> 
> In the piece of makefile below (which actually does nothing), why cd
> $(SRCDIR) does not find the directory if I put ";" after (SRCDIR)? On the
> contrary, if I remove the ";" it will find it. The makefile works fine in
> Linux and Cygwin, but not in MinGW.
[...]
> clean :     
>           cd $(SRCDIR); make clean

Perhaps you're using CMD.EXE, and have the problem described here:
  http://lists.gnu.org/archive/html/make-w32/2009-09/msg00016.html
If not, then say what shell you're using, and exactly what failing
behavior you observe.

Hello there!

 

In the piece of makefile below (which actually does nothing), why cd
$(SRCDIR) does not find the directory if I put ";" after (SRCDIR)? On the
contrary, if I remove the ";" it will find it. The makefile works fine in
Linux and Cygwin, but not in MinGW.

 

SRCDIR = src

 

MeshFree++: 

          cd $(SRCDIR);

 

clean :     

          cd $(SRCDIR); make clean

 

 

The problem is that I need the ";" since I have to execute another makefile
which will be inside SRCDIR:

 

cd $(SRCDIR); make ...;

 

Thanks.

Alejandro.

Hi Everybody,

I have the following windows resource:

1 VERSIONINFO
FILEVERSION     1,0,0,0
PRODUCTVERSION  0,0,0,0
BEGIN
	BLOCK "StringFileInfo"
	BEGIN
		BLOCK "000004b0"
		BEGIN
			VALUE "FileDescription", "My App\0"
			VALUE "FileVersion",SVN_REV
			VALUE "InternalName", "myapp\0"
			VALUE "ProductVersion", "1.0\0"
		END
	END

	BLOCK "VarFileInfo"
	BEGIN
		VALUE "Translation", 0, 0x04b0
	END
END

To compile I use the command:
i586-mingw32msvc-windres windres.rc -O coff -DSVN_REV=365M windres.o

But it returns the error:
i586-mingw32msvc-windres: windres.rc:10: syntax error

What I'm doing wrong?

I've already tried:
-DSVN_REV=365M
-DSVN_REV="365M"
-DSVN_REV=\"365M\"
-DSVN_REV=\""365M"\"

But none of then worked...

Thanks in advance,
Paulo Flabiano Smorigo

John Cocke wrote:
> gcj obligingly produced the 3.5 MB output file a.exe. But running
> a.exe from either the msys command line or the windows command line
> gives no output at all. (No error messages
> either.) Running the file with javac and then java worked OK.

I've seen a similar symptom with programs written in other languages (I 
haven't used gcj), and I'd suggest there's a missing DLL/LIB file. For 
some reason you don't always get an error message in this case, just 
abrupt termination. Have you got the Windows dependency checker? If so, 
load your exe into it and that will tell you what's missing. It could be 
a PATH problem or yet another package needing installation.

> I was wondering if there is a way to use popen() (or some other
> function) from a GUI program to talk to another program over a pipe
> without opening a cmd.exe window?

I worked out a solution to this one several years ago - I can't remember 
the exact details now, except that they are very messy, but I remeber it 
involves creating an invisible window. The code is encapsulated in my 
open source library stlplus.sourceforge.net as the 'Backtick Subprocess' 
class in the portability/subprocesses module. You could take a look at 
the code or just use the library.