[mpich-discuss] question regarding compiling/linking under MingW (MPICH2 1.08)

[Dorian Krause]

Hi,

ting lei wrote:
> *Hi, Dorian*
>
> Thanks a lot for your prompt reply.
> Your command line
> > gcc -I /c/MPICH2/include/ test.c -L/c/MPICH2/lib/ -lmpi
> solves the first problem perfectly on win32.

Good to hear.

>
> On Win64, I see the following from line 333 onwards about MPI_Aint
> "
> /* Definitions that are determined by configure. */
> typedef __int64 MPI_Aint;
> typedef int MPI_Fint;
> #define MPI_AINT_FMT_DEC_SPEC "%I64d"
> #define MPI_AINT_FMT_HEX_SPEC "%I64x"
> "
> It seems that configure made a choice of __int64 for the Win64 package 
> instead of long under linux. Any idea how this might be solved?
> I have also attached the output with the -E option in the attachment 
> err.txt for your reference.
> BTW, I tried to manually change
> typedef __int64 MPI_Aint;
> to
> typedef long MPI_Aint;
> and then, I got:
> gcc -I /c/MPICH2/include/ test.c -L /c/MPICH2/lib/ -lmpi 
> test.c: In function 'main':
> test.c:15: warning: incompatible implicit declaration of built-in 
> function 'printf'
> C:/Users/ting/AppData/Local/Temp/ccsAr9gj.o:test.c:(.text+0x22): 
> undefined reference to `_MPI_Init'
> C:/Users/ting/AppData/Local/Temp/ccsAr9gj.o:test.c:(.text+0x36): 
> undefined reference to `_MPI_Comm_rank'
> collect2: ld returned 1 exit status
>
> or the following for using g++:
>
> $ g++ -I /c/MPICH2/include/ test.c -L /c/MPICH2/lib/ -lmpi
> C:/Users/ting/AppData/Local/Temp/ccPO9opx.o:test.c:(.text+0x22): 
> undefined reference to `_MPI_Init'
> C:/Users/ting/AppData/Local/Temp/ccPO9opx.o:test.c:(.text+0x36): 
> undefined reference to `_MPI_Comm_rank'
> collect2: ld returned 1 exit status
>

You said that you downloaded the binary distribution, correct? I have no 
experiences with MPICH2 on Windows
but I would suspect that the libraries were build with Microsofts C/C++ 
compiler cl and on Win64 the MingGW gcc
compiler and cl are not compatible. __int64 is a Microsoft specific 
extension to C/C++ (http://msdn.microsoft.com/en-us/library/29dh1w7z.aspx).
Also it seems that gcc does some sort of name-mangling (adding an 
underscore to the function name). This is rather strange
for a C compiler...

Probably you'r right that its a gcc 4.3 issue. Maybe some else has more 
insight into this.

Interestingly he doesn't say that he can't find libmpi.a. Are you sure 
that it is not there?

BTW: typedef long MPI_Aint might be a problem because sizeof(long) = 4 
on Windows at least with the Microsoft compiler. Don't know what
gcc does in this situation.

Dorian

>
>
> Thanks again.
>
> T.
>
>
> > Date: Sun, 4 Jan 2009 18:29:23 +0100
> > From: ddkrause at uni-bonn.de
> > To: mpich-discuss at mcs.anl.gov
> > Subject: Re: [mpich-discuss] question regarding compiling/linking 
> under MingW (MPICH2 1.08)
> >
> > Hi
> >
> > ting lei wrote:
> > > Hi,
> > >
> > > Sorry to bother all. I have some questions regarding using MPICH2 
> 1.08
> > > with MingW
> > >
> > > I tried compile MPICH2 1.08 on two different machines, and have met
> > > different problems. I was wondering if someone with a lot experience
> > > could help me out here. thanks in advance.
> > >
> > > 1) The most successful attempt was on a win32 platform, XPSP3 with
> > > MingW+gcc3.4.5
> > > The command line I used was:
> > > gcc -I /c/MPICH2/include/ -lmpi -L/c/MPICH2/lib/ test.c
> > > and I get the following error:
> > > C:/DOCUME~1/ting/LOCALS~1/Temp/cc40AD3K.o:test.c:(.text+0x38):
> > > undefined reference to `MPI_Init'
> > > C:/DOCUME~1/ting/LOCALS~1/Temp/cc40AD3K.o:test.c:(.text+0x4b):
> > > undefined reference to `MPI_Comm_rank'
> > > collect2: ld returned 1 exit status
> >
> > Could you try
> >
> > gcc -I /c/MPICH2/include/ test.c -L/c/MPICH2/lib/ -lmpi
> >
> > Since your testprogram depends on the mpi library you need to specify
> > the library after your program because the linker goes from left to 
> right.
> > >
> > > It seems that the library file libmpi.a is corrected specified,
> > > because if I change it to -lmpi1 it will report
> > > c:\mingw\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\mingw32\bin\ld.exe:
> > > cannot find -lmpi1
> > > collect2: ld returned 1 exit status
> > >
> > >
> > > 2) My less successful attempt was on a Win64 (Vista64) platform with
> > > MingW + gcc4.3:
> > > I tried installing the mpich2-1.0.8-win-x86-64.msi. but
> > > a) after the installation, I couldn't find libmpi.a in MPICH2\lib
> > > folder as I was able to in case 1).b) when I am compiling the toy 
> test
> > > program, I get many errors like this:
> > >
> > > In file included from test.c:1:
> > > c:/MPICH2/include/mpi.h:334: error: expected '=', ',', ';', 'asm' or
> > > '__attribute__' before 'MPI_Aint'
> > >
> > > Is this a gcc4.x problem?
> >
> > Did you take a look at mpi.h line 334? On Linux I can see typedef long
> > MPI_Aint; . Could you compile with the -E flag to see the preprocessor
> > output? Maybe something is overwriting long?
> >
> > >
> > > Best
> > >
> > > T
> > >
> > >
> > > 
> ------------------------------------------------------------------------
> > > From: jayesh at mcs.anl.gov
> > > To: leitingl at hotmail.com
> > > CC: mpich-discuss at mcs.anl.gov
> > > Subject: RE: [mpich-discuss] (no subject) - mingw
> > > Date: Tue, 2 Dec 2008 13:34:18 -0600
> > >
> > > Hi,
> > > You could try installing MPICH2 on windows (from the installer
> > > available at
> > > 
> http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php?s=downloads) 
>
> > > and compile your code and link with the gcc libs (*.a) provided with
> > > the installation (MPICH2\lib directory).
> > >
> > > Regards,
> > > Jayesh
> > >
> > > 
> ------------------------------------------------------------------------
> > > *From:* mpich-discuss-bounces at mcs.anl.gov
> > > [mailto:mpich-discuss-bounces at mcs.anl.gov] *On Behalf Of *ting lei
> > > *Sent:* Tuesday, December 02, 2008 1:31 PM
> > > *To:* mpich-discuss at mcs.anl.gov
> > > *Subject:* [mpich-discuss] (no subject)
> > >
> > > Hi,
> > >
> > > This might be a newbie question.
> > > I see in this thread that people can compile MPICH2 with MingW. I 
> tried that with MingW (gcc 4.3 and 3.4x) several times but
> > > I was never able to get past the ./configure step.
> > > /"I have compiled a C executable using the MPICH2 Windows 
> libraries and //MinGW./"
> > > Could someone please give me some pointers how to compile such an 
> executable?
> > > More specifically, do I have to compile MPICH2 itself from source 
> using MinGW then use some program such as mpicc??
> > > or should I just compile a regular c program and run it with 
> mpiexec.exe ?
> > > If I were to compile MPICH2 itself with MingW, what other packages 
> do I need except the latest version of MingW?
> > >
> > >
> > > Many thanks for your help
> > >
> > >
> > >
> > >
> > > <http://clk.atdmt.com/MRT/go/127032869/direct/01/>
> > > 
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