[gecode-users] Compiling Gecode under native Windows using the Mingw g++ 32-bit compiler [solved][corrected]

[Richard Croad]

I forgot to mention one additional, initial step, namely:

Modify the "configure" file to replace the switch "-pthread" with
"-mthreads" as follows:

$as_echo "#define GECODE_THREADS_PTHREADS 1" >>confdefs.h

 

   CFLAGS="-mthreads${CFLAGS:+ }${CFLAGS}"

    CXXFLAGS="-mthreads${CXXFLAGS:+ }${CXXFLAGS}"

   DLLFLAGS="-mthreads${DLLFLAGS:+ }${DLLFLAGS}"

 

else

etc.

Cheers . Richard

From: Richard Croad [mailto:richard.croad at gmail.com] 
Sent: Friday, 25 January 2013 8:11 p.m.



I have been able to compile and run a fair sample of the gecode examples on
a Windows 7 (Dell computer with a core i7 Intel microprocessor) using the
Mingw g++ 32-bit (GCC) compiler version 4.6.2 and GNU make version 3.8.1.
Native Windows executables were created without the need for Cygwin.  All
steps were carried out in a Msys window.  The required steps are:

Run configure as follows:

./configure --with-host-os=windows CC=gcc CXX=g++

Manually modify the following lines in
".\gecode-3.7.3\gecode\support\config.hpp" as follows: 

/* Whether unistd.h is available */

/* Manually commented out -- #define GECODE_HAS_UNISTD_H 1 */

/* Whether we have posix threads */

/* Manually commented out -- #define GECODE_THREADS_PTHREADS 1 */

Note that GECODE_THREADS_WINDOWS remains defined so that the Windows threads
will be used. 

Manually modify the following inline module in
".\gecode-3.7.3\gecode\int\sorted\sortsup.hpp" as follows (the comments
preceding the code snippet explains the reasons for this change):

/* Int "small" was modified to "small_" to eliminate an unexpected
unqualified-id error when compiling using the Mingw g++ comiler version
4.6.2; the underlying cause of this compiler error has not been determined.
Int "large" was modified to "large_" purely for aesthetic reasons alongside
"small_".

*/

                forceinline void

                OfflineMin::unite(int a, int b, int c) {

                // c is the union of a and b

                int ra = sequence[a].root;

                int rb = sequence[b].root;

                int large_ = rb;

                int small_ = ra;

                if (sequence[ra].rank > sequence[rb].rank)  {

                large_ = ra;

                small_ = rb;

                }

                sequence[small_].parent = large_;

                sequence[large_].rank  += sequence[small_].rank;

                sequence[large_].name   = c;

                sequence[c].root        = large_;

                }

 

Run make in the normal way.  The static libraries "*.a" will be placed in
the gecode-3.7.3 folder, and the example executables will be found
".\gecode-3.7.3\examples" folder.

 

Copy "libgcc_s_dw2-1.dll" and "libstdc++-6.dll" dynamic link library files
from the bin folder in Mingw to the ".\gecode-3.7.3\examples" folder (along
with the executables)

 

Run the examples in the Msys window; they should all work.

 

I have not attempted to compile Gist.

 

Cheers . Richard

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