Re: Using windows.h with mingw and Qt

Hello,

> 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.

Ok, I wrote the following attached test program.  It is based on 
http://msdn.microsoft.com/en-us/library/ms645598(VS.85).aspx

This page tells me "Declared in Winuser.h, include Windows.h".  My first try was only including windows.h,
the second also including winuser.h, the behaviour was in both cases the same.

My Path variable looks like follows:
C:\Programme\MiKTeX
2.7\miktex\bin;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\Programme\Intel\WiFi\bin\;C:\Programme\ATI
Technologies\ATI.ACE\Core-Static;c:\Programme\Gemeinsame
Dateien\Lenovo;C:\Programme\Gemeinsame Dateien\Roxio
Shared\10.0\DLLShared\;C:\Programme\Gemeinsame Dateien\Roxio
Shared\DLLShared\;C:\Programme\Gemeinsame Dateien\Roxio
Shared\DLLShared\;C:\Programme\Gemeinsame Dateien\Roxio
Shared\10.0\DLLShared\;C:\Programme\ThinkPad\ConnectUtilities;C:\Programme\Lenovo\Client
Security Solution;c:\Programme\Microsoft SQL
Server\90\Tools\binn\;C:\Qt\2009.03\qt\bin;C:\Programme\SlikSvn\bin\;C:\MinGW\bin\;\;C:\Programme\MySQLServer51\bin;C:\Programme\util;C:\Programme\Bakefile;c:\Programme\Microsoft
SQL Server\100\Tools\Binn\;c:\Programme\Microsoft SQL Server\
 100\DTS\Binn\

Now I try to compile it.  I get the following error messages:

Re: Using windows.h with mingw and Qt

Wolfgang Pausch wrote:
> This program
>
> #include <windows.h>
>
>
> int main(int argc, char* argv[]) {
> 	MessageBox(NULL, "test", "foo", MB_OK);
> }
>
> works.
there should be an FAQ 

at [l3252 of my distribution] of winuser.h it says
#if (_WIN32_WINNT >= 0x0501)

so you need to
#define _WIN32_WINNT 0x0501
then
#include <windows.h>
to properly include the typedef of RAWINPUTDEVICELIST

Best

Mark

http://www.halloit.com

Key ID 046B65CF

Re: Using windows.h with mingw and Qt

Hello Mark,

> at [l3252 of my distribution] of winuser.h it says
> #if (_WIN32_WINNT >= 0x0501)
> 
> so you need to
> #define _WIN32_WINNT 0x0501
> then
> #include <windows.h>
> to properly include the typedef of RAWINPUTDEVICELIST

Thanks, now it works.  However, what am I doing here?  Do I define a symbol which would usually be defined on my
Windows version (Windows XP), and which just MingW misses for some reason.

Or do I mimic a windows version I actually don´t have?  

So, am I hacking something which would normally not work, or am I just working around some limitation of MingW?

Wolfgang
--

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Re: Using windows.h with mingw and Qt

Wolfgang Pausch wrote:
> Hello Mark,
>   
>> at [l3252 of my distribution] of winuser.h it says
>> #if (_WIN32_WINNT >= 0x0501)
>>
>> so you need to
>> #define _WIN32_WINNT 0x0501
>> then
>> #include <windows.h>
>> to properly include the typedef of RAWINPUTDEVICELIST
>>     
> Thanks, now it works.  However, what am I doing here?  Do I define a symbol which would usually be defined on my
Windows version (Windows XP), and which just MingW misses for some reason.
>
> Or do I mimic a windows version I actually don´t have?  
>
> So, am I hacking something which would normally not work, or am I just working around some limitation of MingW?
>
> Wolfgang
>   
Hi Wolfgang,

the way I see it you are defining a windows version you are compiling
for; as, essentially the necessary dll would be absent in pre NT5.1, you
are must define that you are compiling for NT5.1+ [ie xp/server 2003]
http://msdn.microsoft.com/en-us/library/aa383745(VS.85).aspx

Best

Re: Using windows.h with mingw and Qt

> So, am I hacking something which would normally not work, or am I just working around some limitation of MingW?

There is no "hacking" involved. You are simply selecting what parts of
the headers are visible to you. The MinGW default is quite
conservative, only declarations of APIs (and related macro and type
definitions) present on some quite old version of Windows is by
default visible. To get declarations of APIs introduced in later
versions of Windows, you need to redefine _WIN32_WINNT.

--tml

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An Introduction to GCC

I found this little (just 137 pages) and inexpensive ($16) book an excellent aid to beginning work with gcc:

http://www.amazon.com/Introduction-GCC-Brian-J-Gough/dp/0954161793/ref=cm_cr_pr_product_top

I keep dipping back into it to fix silly problems I encounter such as: the order of libs on the command line,
linking with shared objects, library archiver syntax, etc. It's not a monster reference manual but it
seems to cover ALL the initial problems one is likely to bump into as a new user and it is very easy to read.

You can probably find everything in the book on-line and at no apparent cost but, if your time is worth
anything, having this introduction in one place is valuable. It certainly is for me.
  		 	   		  
_________________________________________________________________
Lauren found her dream laptop. Find the PC that’s right for you.
http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290
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cross-compiling linker errors

I seem to be having basically the same problem as David GF did last month, 
but nobody responded to his question.

I'm compiling a library for windows on ubuntu.  I've been able to compile 
the dependent libraries successfully and everything is created and 
installed in /usr/i586-mingw32msvc/ (what I gave configure as '--prefix').

However, once I try to create an actual program that uses the library:

i586-mingw32msvc-c++ -Wall -ggdb -I/usr/i586-mingw32msvc/include/ -L/usr/i586-mingw32msvc/lib/
-o test.exe test.cpp -lsbml

I get errors like:

test.cpp:17: undefined reference to `__imp__writeSBMLToString'

and further on:

libsbml.a(zfstream.o):[home directory]/mingw_libsbml/src/compress/zfstream.cpp:67: undefined
reference to `_gzopen'

Checking nm:

/usr/i586-mingw32msvc/bin/nm /usr/i586-mingw32msvc/lib/libsbml.a | grep writeSBMLToString
         U _writeSBMLToString
00002f40 T _SBMLWriter_writeSBMLToString
00002e80 T _writeSBMLToString

and:

Re: cross-compiling linker errors

On 10/2/2009 03:29, Lucian Smith wrote:
> I seem to be having basically the same problem as David GF did last month,
> but nobody responded to his question.
>
> I'm compiling a library for windows on ubuntu.  I've been able to compile
> the dependent libraries successfully and everything is created and
> installed in /usr/i586-mingw32msvc/ (what I gave configure as '--prefix').
>
> However, once I try to create an actual program that uses the library:
>
> i586-mingw32msvc-c++ -Wall -ggdb -I/usr/i586-mingw32msvc/include/
-L/usr/i586-mingw32msvc/lib/ -o test.exe test.cpp -lsbml
>
> I get errors like:
>
> test.cpp:17: undefined reference to `__imp__writeSBMLToString'
>
> and further on:
>
> libsbml.a(zfstream.o):[home directory]/mingw_libsbml/src/compress/zfstream.cpp:67:
undefined reference to `_gzopen'
>
> Checking nm:
>
> /usr/i586-mingw32msvc/bin/nm /usr/i586-mingw32msvc/lib/libsbml.a | grep writeSBMLToString
>           U _writeSBMLToString
> 00002f40 T _SBMLWriter_writeSBMLToString
> 00002e80 T _writeSBMLToString
>
> and:

Hi

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Re: Hi

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