# SCIP

Solving Constraint Integer Programs

Building and installing the applications and examples

Each application and example may be built in two ways, either by using Cmake or by using SCIP's own Makefile system. The choice of the build system depends on the desired target platform and the availability of those tools there, as well as your personal preferences. For most users, we recommend to use the CMake system, especially on non Unix platforms.

In the following description, scip_project_binary inside its respective SCIPProjectDir can be one of the following:

Applications

Folder cmake target make target
Coloring coloring coloring
CycleClustering cycleclustering cycleclustering
MinIISC miniisc miniisc
Ringpacking ringpacking ringpacking
Scheduler scheduler scheduler

Examples

Folder cmake target make target
Binpacking binpacking binpacking
CallableLibrary brachistochrome brachistochrome
CallableLibrary circle circle
CallableLibrary circlepacking circlepacking
CallableLibrary gastrans gastrans
CallableLibrary string string
Eventhdlr eventhdlr scip
GMI gmi gmi
LOP lop lop
MIPSolver scipmip scipmip
Queens queens queens
Relaxator relaxator scip
SCFLP scflp scflp
TSP sciptsp sciptsp
VRP vrp vrp

## Installation information using CMake

Please compile SCIP first, see the cmake section of INSTALL in the main SCIP directory for instructions, or refer to the online documentation of SCIP.

The application can be compiled within the same build directory as SCIP. Assuming that the build directory of SCIP was named build and the application or example target is scip_project_binary, simply execute

cmake --build build --target <scip_project_binary>

To build all applications at once, use

cmake --build build --target applications

To build all examples at once, use

cmake --build build --target examples

It is also possible to build scip_project_binary in a stand-alone build directory. Therefore, it is necessary to create the stand-alone build directory first and configure the build using CMake. This approach requires a systemwide installation of SCIP. If SCIP is not installed systemwide, but in a local directory "/path/to/scip/installation", this needs to be communicated as follows, by either specifying the SCIP_DIR variable or adjusting the CMAKE_PREFIX_PATH variable. The following commands need to be issued from the root directory of the example or application that should be built.

cmake -Bbuild -H. [-DSCIP_DIR=/path/to/scip/installation/lib/cmake/scip] [-DCMAKE_PREFIX_PATH=/path/to/scip/installation]
cmake --build build

If you are unsure what an installation directory is, "/path/to/scip/installation" should contain the directories "include" and "lib" or the equivalents on your target operating systems. If SCIP has been compiled into a build-directory as opposed to an installation directory, it is possible to point either of the two variables SCIP_DIR or CMAKE_PREFIX_PATH to this build directory. Finally, this specification should be used to give a local installation precedence over a systemwide installation of SCIP.

Please refer to the online documentation of SCIP for a list of available configuration options and available tests.

## Installation information for SCIP's custom Makefile system on Linux

In the following, some of the names depend on your machine and your compilation settings:

• OSTYPE : the operating system the string returned by uname -s in lower case with the following replacements:
• "cygwin*" is replaced by only "cygwin"
• "irix??" is replaced by only "irix"
• "windows*" is replaced by only "windows"
• ARCH: the architecture the string returned by uname -m, modified by the following rules to subsume some architectures:
• "sun??" is replaced by "sparc"
• "i?86" is replaced by "x86"
• "IP??" is replaced by "mips"
• "9000????" is replaced by "hppa"
• "Power Macintosh" is replaced by "ppc"
• "00??????????" is replaced by "pwr4"
• COMP: the compiler gnu, intel, compaq, sun, insure, ... (see make/ directory)
• OPT: the optimization level of compilation dbg, opt, or prf
• LPS: the LP solver to use spx (= spx2), spx1, clp, cpx, xprs, msk, grb, glop, qso, none

For example, if you want to install SCIP on a Linux system with a x86 processor using the gnu compiler in debug mode, and using Soplex version >= 1.4.0 as LP solver, you would have the following names:

make OSTYPE=linux ARCH=x86 COMP=gnu OPT=dbg LPS=spx

Here is what you have to do to compile and run the application or example project using SCIP as a library:

1. Install and compile SCIP as described in the make section of the INSTALL file of SCIP's main directory, and make sure to create the necessary softlinks in SCIP's lib directory
2. In the project directory edit the variable SCIPDIR if necessary - it should point to the directory that contains SCIP.
3. Compile the application or example project: In the main project directory, enter make OPT=<...> LPS=<...> COMP=<...> with the following options:
• OPT=opt to use optimized compilation mode (default)
• OPT=dbg to use debug compilation mode
• OPT=prf to use performance analysis compilation mode
• LPS=spx to use SoPlex as LP solver (based on the new interface available since version 2.0, default)
• LPS=spx1 to use SoPlex as LP solver (based on the old interface for versions >= 1.4)
• LPS=cpx to use CPLEX as LP solver
• LPS=grb to use Gurobi as LP solver
• LPS=xprs to use XPRESS as LP solver
• LPS=msk to use MOSEK as LP solver
• LPS=clp to use CLP as LP solver
• LPS=glop to use Glop as LP solver
• LPS=qso to use QSopt as LP solver
• LPS=none to use no LP solver
• COMP=gnu to use GNU c/c++ compiler (default)
• other compilers are available (see make/ directory)
• IPOPT=true to enable using Ipopt as NLP solver for CallableLibrary:
4. To run the program enter bin/scip_project_binary..... (e.g. bin/scip_project_binary.linux.x86.gnu.opt.spx) or bin/scip_project_binary which is a link to last compiled version
5. To generate the documentation, you need to have doxygen installed. Enter make doc in the project's folder if there exists a .dxy file in the project's doc folder or run make doc in scip's doc folder. Then open html/index.html in your favorite browser.

On some machines, you should use gmake instead of make. For more information and a list of available flags please refer to the online documentation of SCIP