error of compiling and linking example C propgrams in an open source tool (SCIP) in cygwin32 on win7

Question

This is not a programing question but a tool (SCIP) install and library "mismatch" problem on cygwin 32 on win 7.

If you do not think this is a good place to ask this, please let me know before voting down. thanks !

I am trying to install a integer programming model solver from

http://scip.zib.de/download.php?fname=scipoptsuite-3.1.1.tgz

This can be used to solve optimization integer programming problems.

It support installing on cygwin 32 bits.

I have installed it successfully because I can launch the interactive shell from cygwin like :

$ ./bin/scip
SCIP version 3.1.1 [precision: 8 byte] [memory: block] [mode: optimized] [LP solver: SoPlex 2.0.1] [GitHash: bade511]
Copyright (c) 2002-2014 Konrad-Zuse-Zentrum fuer Informationstechnik Berlin (ZIB)

External codes:
  SoPlex 2.0.1         Linear Programming Solver developed at Zuse Institute Berlin (soplex.zib.de) [GitHash: 51184cf]
  cppad-20140000.1     Algorithmic Differentiation of C++ algorithms developed by B. Bell (www.coin-or.org/CppAD)

user parameter file <scip.set> not found - using default parameters

SCIP>

But, I am trying to find out how to call its API library (implemented by C) from C++ or C# by studying its example code in the tool.

After downloading, the example code can be found at

SCIP\scipoptsuite-3.1.1\scip-3.1.1\examples

When I followed the INSTALL instructions (in each example subfolder) by running

make all

I got error:

/examples/Binpacking
$ make all
-> compiling obj/O.cygwin.x86.gnu.opt/branch_ryanfoster.o
-> compiling obj/O.cygwin.x86.gnu.opt/cmain.o
-> compiling obj/O.cygwin.x86.gnu.opt/cons_samediff.o
-> compiling obj/O.cygwin.x86.gnu.opt/pricer_binpacking.o
-> compiling obj/O.cygwin.x86.gnu.opt/probdata_binpacking.o
-> compiling obj/O.cygwin.x86.gnu.opt/reader_bpa.o
-> compiling obj/O.cygwin.x86.gnu.opt/vardata_binpacking.o
-> linking bin/binpacking.cygwin.x86.gnu.opt.spx

**../../lib/libsoplex.cygwin.x86.gnu.opt.a: file not recognized: File format not recognized
collect2: error: ld returned 1 exit status**

Makefile:143: recipe for target 'bin/binpacking.cygwin.x86.gnu.opt.spx' failed
make: *** [bin/binpacking.cygwin.x86.gnu.opt.spx] Error 1

Why the static lib format cannot be recognized ?

I have asked this in SCIP mailing list, but, nobody knows how to solve this kind of IT issue (compile/link).

So, hope that I can get help here.

If more information needed, please let me know.

Any help would be appreciated.

Thanks !