[SCIP] Installing SCIP linking CPLEX 12.8 under Windows using MinGW

[Shin, Jungeun]

(I am sending this email again after getting delivery failure alarm. If you got the duplicate emails, please disregard it. Sorry about the inconvenience)



Thank you, Stefan.

I resolved the problem with copying the CPLEX library and include directory into SCIP directory.

But I need to ask another fundamental installation question.



I want to build SCIPoptsuite linking Cplex as LP solver with CMake.

(I intend to use SCIP Python interface, pyscipopt. The website said Makefile system is not compatible with PySCIPOPT.

https://github.com/SCIP-Interfaces/PySCIPOpt/blob/master/INSTALL.md )



>From other mails in this archives, I found you suggested compiling it under MinGW, MSys, or MSys2 to install on Windows, which is Makefile system.  Given these conditions and answers from this archive, I have a few question about installation on Windows.



1) Can I install SCIPoptsuite with lpx=cpx  using CMake On Window? If not, I would find a Linux server without wasting more time on it.



2) Can I use pre-built SCIPoptsuite and set Cplex as LPsolver?



3) I actually tried to install it with CMake, but since I wanted to make it as simple as possible, I set the most parameters as off besides SCIP.

(  cmake -Bbuild -H. -DZLIB=off -DREADLINE=off -DZIMPL=off -DGMP=off -DLPS=cpx -DSOPLEX=off -DGCG = off)  and added the CPLEX_INCLUDE path and CPLEX_LIBRARY path ( copied the file and paste it into SCIP directory and use those path).

Then, I got a bunch of unresolved external symbol error such as following error from the Visual studio.



Severity               Code     Description         Project File         Line        Suppression State

Error      LNK2019               unresolved external symbol __imp__CPXaddcols at 44 referenced in function _SCIPlpiAddCols                scip        C:\Program Files\scipoptsuite-7.0.0\build\scip\src\lpi_cpx.obj    1



It seems like it also needs cplex.dll as well as cplex.lib to link them. I tried to add it to Debug folder inside the build directory, but it still has an error.

I would appreciate any help.

Thank you



Best,





-----Original Message-----

Subject: Re: [SCIP] Installing SCIP linking CPLEX 12.8 under Windows using MinGW



Hi,



that paragraph in "Remarks on Installing under Windows using MinGW"

probably refers to a pretty old MinGW version. It was untouched since 2009.



SCIP tries to create a softlink lib/include/cpxinc that points to C:/Program Files/IBM/ILOG/CPLEX_Studio129/cplex/include/ilcplex/. This never worked reliably for me. Try to just copy the directory C:/Program Files/IBM/ILOG/CPLEX_Studio129/cplex/include/ilcplex/ to lib/include/cpxinc instead.



Best,

Stefan



On 5/16/20 6:54 PM, Shin, Jungeun wrote:

> Hi,

>

> I have been trying to install SCIP with Cplex 12.8 on Windows using MinGW and have some questions.

>

>

>

>    1.  I don't quite understand the following part of the "Remarks on Installing under Windows using MinGW" from installation information of your website.

>

>

> " Second you need to copy the file sh.exe to bash.exe otherwise various scripts (including makefiles) will not work. Normally unistd.h covers also the getopt-options, but for mingw you need to add the entry #include <getopt.h> into "/mingw/include/unistd.h" after the other include-entries (if not present)."

>

> What does it mean by copying the file sh.exe to bash.exe? Does it mean to change the file name? Also, there is no unistd.h file in my ""/mingw/include/".

>

> Directory of C:\msys\mingw32\include

>

> 05/05/2020  11:01 AM    <DIR>          .

> 05/05/2020  11:01 AM    <DIR>          ..

> 05/11/2018  09:34 PM            13,037 ansidecl.h

> 05/11/2018  09:34 PM           262,716 bfd.h

> 05/11/2018  09:34 PM            34,356 bfdlink.h

> 05/11/2018  09:35 PM            14,771 dis-asm.h

> 05/05/2020  11:01 AM    <DIR>          gdb

> 05/11/2018  09:36 PM             2,912 gnumake.h

> 05/05/2020  11:01 AM    <DIR>          libiberty

> 05/11/2018  08:28 PM             3,700 libmangle.h

> 05/11/2018  09:34 PM            14,593 plugin-api.h

> 05/11/2018  09:34 PM             2,191 symcat.h

>

>

>    1.  I proceeded to installation ignoring the part described in 1). Then, I encountered the following error, saying that my cplex directory is not a directory. Can this error related to bash.exe? or did I use wrong path?

>

>

> C:\Program Files\scip-7.0.0>make ZLIB=false READLINE=false GMP=false

> LPS=cpx

> -> generating necessary links

>

> - Current settings: LPS=cpx OSTYPE=mingw ARCH=x86 COMP=gnu

> SHARED=false SUFFIX= ZIMPL=false ZIMPLOPT=opt IPOPT=false IPOPTOPT=opt

> WORHP=false WORHPOPT=opt FILTERSQP=false EXPRINT=cppad GAMS=false

> SYM=none

>

> * SCIP needs some softlinks to external programs, in particular, LP-solvers.

> * Please insert the paths to the corresponding directories/libraries below.

> * The links will be installed in the 'lib/include' and 'lib/static' directories.

> * For more information and if you experience problems see the INSTALL file.

>

>    -> "cpxinc" is the path to the CPLEX "include" directory, e.g., "<CPLEX-path>/include/ilcplex".

>    -> "libcplex.*.a" is the path to the CPLEX library, e.g., "<CPLEX-path>/lib/x86-64_linux/static_pic/libcplex.a"

>    -> "libcplex.*.so" is the path to the CPLEX library, e.g., "<CPLEX-path>/bin/x86-64_linux/libcplex1263.so"

>

>> Enter soft-link target file or directory for "lib/include/cpxinc" (return if not needed):

>> C:/Program Files/IBM/ILOG/CPLEX_Studio129/cplex/include/ilcplex/

> -> creating softlink "lib/include/cpxinc" -> "C:/Program Files/IBM/ILOG/CPLEX_Studio129/cplex/include/ilcplex/"

> ln: target `lib/include/cpxinc' is not a directory

> make[2]: *** [lib/include/cpxinc] Error 1

> make[1]: ***

> [lib/static/linkscreated.cpx-opt.mingw.x86.gnu.false-opt.false-opt.fal

> se.false.none.false] Error 2

> make: *** [preprocess] Error 2



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