Scippy

SCIP

Solving Constraint Integer Programs

INSTALL

If you want to compile SCIP yourself, it is recommended to download the SCIP Optimization Suite tarball from scipopt.org as it contains also the LP solver SoPlex and the presolver PaPILO.

We provide two different systems to compile the code:

Be aware that generated libraries and binaries of both systems might be different and incompatible. For further information please refer to the online documentation of SCIP.

The easiest way to install SCIP is to use the SCIP Optimization Suite, which contains SCIP, SoPlex, and ZIMPL. For that we refer to the README.md file of the SCIP Optimization Suite (in case of the SCIP Optimization Suite there is no need to specify any directories, the compiling process is fully automated).

Building SCIP using CMake

CMake is a build system generator that can create, e.g., Makefiles for UNIX and Mac or Visual Studio project files for Windows.

CMake provides an extensive documentation explaining available features and use cases as well as an FAQ section. It's recommended to use the latest stable CMake version available. cmake --help is also a good first step to see available options and usage information.

Windows and platform independent build instructions

To build SCIP you may use the CMake GUI to specify the path to SCIP and the desired location for the build. Available options are listed and can be modified to fit your needs. After the configuration step is done, open the generated Visual Studio solution file and compile it. Note that compilation is tested on MSVC version >= 12.

Alternatively, you may use the command line to configure and build SCIP by creating a build directory and then building the configuration:

cmake -Bbuild -H. [-DSOPLEX_DIR=/path/to/soplex]
cmake --build build --config Release [Debug]

Command line instructions (Linux, macOS)

Compiling SCIP directly can be done as follows:

tar xvzf scip-x.y.z.tgz # unpack the tarball
cd scip-x.y.z # change into the directory
mkdir build # create a new directory
cd build # change directories
cmake .. -DCMAKE_INSTALL_PREFIX=<install/dir> [-DSOPLEX_DIR=/path/to/soplex] # configure the build
make # start compiling SCIP
make check # (recommended) check build
make install # (optional) install SCIP executable, library, and headers

Note: For a full ctest run ctest instead of make check after compilation.

CMake checks for available third-party libraries like GMP or ZLIB and sets up the configuration accordingly. Note that the symmetry codes Bliss and Sassy are shipped with SCIP.

Note: Here is a list of apt package requirements for ubuntu or debian users that want to build the entire SCIP Optimization Suite from source tarball:

apt-get install wget cmake g++ m4 xz-utils libgmp-dev unzip zlib1g-dev libboost-program-options-dev libboost-serialization-dev libboost-regex-dev libboost-iostreams-dev libtbb-dev libreadline-dev pkg-config git liblapack-dev libgsl-dev flex bison libcliquer-dev gfortran file dpkg-dev libopenblas-dev rpm

Additionally the following dependencies need to be downloaded, compiled and installed:

Troubleshooting

If you have a problem with your cmake configuration and just want to build scip with all the available dependencies, the simplest solution is to activate the AUTOBUILD option:

cmake .. -DAUTOBUILD=on

This option activates the automatic search for dependent packages like GMP, IPOPT, PaPILO, Readline, WORHP, ZIMPL, ZLIB, and deactivates the missing ones.

If you need a specific package that is not automatically found, you should try setting a hint to the installation with the specified variable. Specific packages can also be disabled individually.

Examples of errors and possible solutions:

Problem:

-- Finding PAPILO
-- Could NOT find PAPILO (missing: PAPILO_DIR)
CMake Error at CMakeLists.txt:359 (message):
PAPILO not found, try specifying PAPILO_DIR.
If you have troubles configuring, you can consider setting AUTOBUILD=ON to
try and find optional packages as available.
-- Configuring incomplete, errors occurred!

Solution: add -DPAPILO_DIR=/path/to/papilo/installation or disable PaPILO by setting -DPAPILO=off.

Problem:

-- Finding ZIMPL
-- Could NOT find ZIMPL (missing: ZIMPL_DIR)
CMake Error at CMakeLists.txt:533 (message):
ZIMPL not found, try specifying ZIMPL_DIR.
If you have troubles configuring, you can consider setting AUTOBUILD=ON to
try and find optional packages as available.
-- Configuring incomplete, errors occurred!

Solution: add -DZIMPL_DIR=/path/to/zimpl/installation or disable ZIMPL by setting -DZIMPL=off.

Problem:

-- Finding IPOPT
-- Could NOT find IPOPT (missing: IPOPT_LIBRARIES) (Required is at least version "3.12.0")
CMake Error at CMakeLists.txt:564 (message):
IPOPT not found, try specifying IPOPT_DIR.
If you have troubles configuring, you can consider setting AUTOBUILD=ON to
try and find optional packages as available.
-- Configuring incomplete, errors occurred!

Solution: add -DIPOPT_DIR=/path/to/ipopt/installation or disable IPOPT by setting -DIPOPT=off.

Problem:

-- Finding Solver "spx"
-- Finding Soplex
CMake Error at CMakeLists.txt:375 (find_package):
Could not find a package configuration file provided by "SOPLEX" with any
of the following names:
SOPLEXConfig.cmake
soplex-config.cmake
Add the installation prefix of "SOPLEX" to CMAKE_PREFIX_PATH or set
"SOPLEX_DIR" to a directory containing one of the above files. If "SOPLEX"
provides a separate development package or SDK, be sure it has been
installed.
-- Configuring incomplete, errors occurred!

Solution: add -DSOPLEX_DIR=/path/to/soplex/installation or disable SOPLEX by setting -DLPS=none or select a different lp solver you have available by -DLPS=grb -DGUROBI_DIR=/path/to/gurobi/installation or -DLPS=xprs -DXPRESS_DIR=/path/to/xpress/installation or -DLPS=msk -DMOSEK_DIR=/path/to/mosek/installation or -DLPS=cpx -DCPLEX_DIR=/path/to/cplex/installation or -DLPS=glob -DGLOB_DIR=/path/to/glob/installation

Modifying a CMake configuration

CMake uses an out-of-source build, i.e., compiled binaries and object files are separated from the source tree and located in another directory. Usually this directory is called build or debug or whatever you prefer. From within this directory, run cmake <path/to/SCIP> to configure your build, followed by make to compile the code according to the current configuration (this assumes that you chose Linux Makefiles as CMake Generator). By default, SCIP searches for SoPlex as LP solver. If SoPlex is not installed systemwide, the path to a CMake build directory of SoPlex must be specified (i.e. one that contains "soplex-config.cmake"). Alternatively, a different LP solver can be specified with the LPS variable.

Afterwards, successive calls to make are going to recompile modified source code, without requiring another call to cmake. The initial configuration step checks your environment for available third-party libraries and packages and sets up the configuration accordingly, e.g., disabling support for GMP if not installed.

The generated executable and libraries are put in directories bin and lib respectively and will simply be named scip or libscip.so. This is different from the naming convention of the Makefile setup that appended the configuration details like OS and third party dependencies directly to the name of the binary or library. The CMake setup tries to follow the established Linux/UNIX compilation conventions to facilitate the use of the libraries in other applications. The previously generated sub-libraries like liblpi.so or libobjscip.so are not created by default anymore. They can be built using the respective targets liblpi, libobjscip, etc. The main library libscip.so will contain all SCIP sources and won't have dependencies to the other sub-libraries.

There are several options that can be passed to the cmake <path/to/SCIP> call to modify how the code is built. For all of these options and parameters you have to use -D<Parameter_name>=<value>. Following a list of available options, for the full list run

cmake </path/to/SCIP/> -LH

and set them by running cmake .. -D<option>=<value>. Options can be chained together or be specified in subsequent calls to cmake. The existing configuration will be updated or extended. e.g., cmake </path/to/SCIP> -DSOPLEX_DIR=<path/to/SoPlex/build/or/install>.

CMake option Available values Makefile equivalent Remarks
AUTOBUILD on, off – automatically find dependencies on availability, ignores individual flags of these packages
CMAKE_BUILD_TYPE Release, Debug, ... OPT=[opt, dbg]
GMP on, off GMP=[true, false] specify GMP_DIR if not found automatically
IPOPT on, off IPOPT=[true,false] requires IPOPT version >= 3.12.0; specify IPOPT_DIR if not found automatically
LAPACK on, off LAPACK=[true,false] requires Lapack to be installed on the system
LPS spx, cpx, grb, xprs, ... LPS=... specify SOPLEX_DIR, CPLEX_DIR, MOSEK_DIR, ... if LP solver is not found automatically
SYM bliss, sbliss, none, ... SYM=[bliss, sbliss, none]choose symmetry handling
WORHP on, off WORHP=[true,false] should worhp be linked; specify WORHP_DIR if not found automatically
ZIMPL on, off ZIMPL=[true, false] specify ZIMPL_DIR if not found automatically
AMPL on, off AMPL=[true, false]
READLINE on, off READLINE=[true, false]
..._DIR <custom/path/to/.../package> – e.g. IPOPT_DIR, CPLEX_DIR, WORHP_DIR, Readline_DIR ...
BOOST_ROOT <custom/path/to/.../boost> – hint for location of boost
CMAKE_INSTALL_PREFIX \<path\> INSTALLDIR=\<path\>
SHARED on, off SHARED=[true, false]
CXXONLY on, off – use a C++ compiler for all source files
COVERAGE on, off – use with gcc, lcov, gcov in debug mode
COVERAGE_CTEST_ARGS ctest argument string – see ctest --help for arguments
DEBUGSOL on, off DEBUGSOL=[true,false] specify a debugging solution by setting the "misc/debugsol" parameter of SCIP
LPSCHECK on, off LPSCHECK=[true,false] double check SoPlex results with CPLEX
NOBLKMEM on, off NOBLKMEM=[true,false]
NOBUFMEM on, off NOBUFMEM=[true,false]
NOBLKBUFMEM on, off NOBLKBUFMEM=[true,false]
MT on, off use static runtime libraries for Visual Studio compiler on Windows
THREADSAFE on, off THREADSAFE=[true,false] thread safe compilation
SANITIZE_... on, off – enable sanitizer in debug mode if available
TPI tny, omp, none TPI=[tny,omp,none] enable task processing interface required for concurrent solver

Parameters can be set all at once or in subsequent calls to cmake - extending or modifying the existing configuration.

Testing with CTest

There is an extensive test suite written for [CTest]("https://cmake.org/cmake/help/latest/manual/ctest.1.html) that may take a while to complete. To perform a quick test to see whether the compilation was really successful you may run make check. To see all available tests, run

ctest -N

and to perform a memory check, run

ctest -T MemCheck

If Criterion is installed (set custom path with -DCRITERION_DIR=<path>) the target unittests can be used to compile and run the available unit tests.

A coverage report for the entire test suite can be generated. This requires a modification of the compilation process. Two variables govern the report generation, COVERAGE and COVERAGE_CTEST_ARGS. It is recommended to use the Debug build type.

cmake </path/to/SCIP> -DCOVERAGE=on -DCOVERAGE_CTEST_ARGS="-R MIP -E stein -j4" -DCMAKE_BUILD_TYPE=Debug

In this example, coverage is enabled in combination with the build type Debug. In addition, only the coverage for tests with "MIP" in the name are run, excluding those that have "stein" in the name. The tests are performed in parallel using 4 cores.

Use the coverage target, e.g., make coverage, to build the coverage report. The generated report can be found under "coverage/index.html".

Additional targets

There are several further targets available, which can be listed using make help. For instance, there are some examples that can be built with make examples or by specifying a certain one: make <example-name>. For detailed instructions see the installation instructions for applications and examples (local link).

CMake target Description Requirements
scip build SCIP executable
applications build executables for all applications
examples build executables for all examples
unittests build unit tests the Criterion package
all_executables build all of the above
libscip build the SCIP library
install install SCIP
coverage run the test suite and create a coverage report build flag -DCOVERAGE=on
liblpi build the LPI library
libobjscip build the ObjSCIP library for the C++ wrapper classes

Building SCIP using the Makefile system

For Linux and Mac, reading the section "Brief installation description" below should usually be enough. If this is not the case, you can find the "Detailed installation description" below as well as some examples.

We recommend using GCC version 4.8 or later.

Brief installation description

The easiest way to install SCIP is to use the SCIP Optimization Suite which contains SCIP, SoPlex, and ZIMPL. For that we refer to the README.md file of the SCIP Optimization Suite (main advantage: there is no need to specify any directories, the compiling process is fully automated).

Compiling SCIP directly can be done as follows:

tar xvzf scip-x.y.z.tgz # unpack the tarball
cd scip-x.y.z # change into the directory
make # start compiling SCIP
make test # (recommended) check your SCIP installation
make install INSTALLDIR=/path/to/install/dir # (optional) install the header, libraries, and binary

On your first compilation you will be asked for some soft-link targets, depending on the LP solver you want to use. Usually, SCIP needs the following information a. the directory where the include files of the LP solver are located b. the library file(s) lib*.a or/and lib*.so

Besides that, SCIP needs similar soft-link targets for ZIMPL a. the directory where the include files of ZIMPL are located b. the library file(s) lib*.a or/and lib*.so

You will need either the .a or the .so files and can skip the others by just pressing return.

The most common compiling issue is that some libraries are missing on your system or that they are outdated. SCIP by default requires the following packages (with usual names for Linux systems in parentheses):

  • zlib (libz-dev)
  • gmp (libgmp-dev),
  • readline (libreadline-dev), and
  • ncurses (libncurses-dev)

Note that under Linux-based systems, you need to install the developer-versions of gmp/zlib/readline, in order to also have the header-files available.

If you are not able or do not want to install these packages, try compiling with:

make ZLIB=false READLINE=false GMP=false.

Detailed installation description

Here is what you have to do to get SCIP running:

1. Compile the library and the solver program

In your SCIP main directory, enter make [options] with the following options:

parameter and default options description
ARCH=x86_64 [x86_64, x86, sparc, mips, hppa, ppc, pwr4] the architecture: try to autodetect
AMPL=true [true, false] to enable or disable AMPL .nl file reader and support for using SCIP executable as solver in AMPL
COMP=gnu [gnu, clang, intel]Use Gnu, Clang or Intel compiler.
EXPRINT=cppad [cppad, none] to use CppAD as expressions interpreter
FILTERSQP=false [false, true] to enable or disable FilterSQP interface
GMP=true [true, false] to enable or disable GMP library for exact counting and Zimpl support
IPOPT=false [false, true] to disable or enable IPOPT interface (needs IPOPT >= 3.12.0)
LAPACK=false [false, true] link with Lapack; requires Lapack to be installed on the system
LPS=spx [spx1, cpx, grb, xprs, msk, clp, glop, qso, highs, none] determines the LP-Solver, should be installed seperately. Options to use SoPlex (> version 2.0), SoPlex (>= version 1.4), CPLEX, Gurobi, XPRESS, MOSEK, CLP, Glop, QSopt, HiGHS as LP solver, no LP solver
LPSOPT=opt [opt, dbg, opt-gccold] Choose the debug or optimized version (or old GCC optimized) version of the LP-solver (currently only available for SoPlex and CLP).
NOBLKMEM=false [false, true] Turns the internal SCIP block memory off or on.
NOBUFMEM=false [false, true] Turns the internal SCIP buffer memory off or on.
NOBLKBUFMEM=false [false, true] Turns the internal SCIP block and buffer memory off or on. This way the code can be checked by valgrind or similar tools.
OPT=opt [opt, dbg, perf] to use optimized, debug, performance (only with Gnu compiler) analysis compilation mode. dbg turns on debug mode. This enables asserts and avoids macros for several function in order to ease debugging.
OSTYPE [linux, darwin, cygwin, irix, windows, mingw] the operating system: try to autedetect
PAPILO=false [false, true] to disable or disable the MILP presolver based on the presolving library PaPILO
READLINE=true [true, false] to enable or disable readline library for interactive shell
SHARED=false [false, true] to suppress or create shared libraries (only Gnu compiler)
SYM=none [none, bliss, sbliss, nauty, snauty] to choose method for computing symmetries in mixed nonlinear integer programs
TPI=none [none, omp, tny] to disable the task processing interface or use it with the openmp or tinycthreads interface for concurrent solves
VERBOSE=false [false, true] to suppress or display of compiler and linker invocations
WORHP=false [false, true] to disable or enable WORHP interface (needs WORHP >= 2.00)
ZIMPL=false [false, true, auto]to enable or disable ZIMPL file reader (needs ZIMPL and GMP to be installed)
ZLIB=true [true, false] to enable or disable zlib for reading of compressed files

For example, if you want to install SCIP on a Linux system with a x86 processor using the gnu compiler in debug mode, using Soplex version as LP solver, and neither an expressions interpreter nor symmetry handling techniques or multi-threading, you would use following:

make OSTYPE = linux ARCH = x86 COMP = gnu OPT = dbg EXPRINT = none

On some machines, you should use gmake instead of make.

On your first compilation you will be asked for some soft-link targets, depending on the external software you want to use. Usually, SCIP needs the following information:

  • the directory where the include files of the external software
  • the library file(s) lib*.a or/and lib*.so You will need either the .a or the .so files and can skip the others by just pressing return.

On MAC systems, GMP is often not installed in the library and include paths, e.g. in /sw/include and /sw/lib. In this case, you have to add the paths explicitly. In the above example add the settings:

USRFLAGS=-I/sw/include USRCPPFLAGS=-I/sw/include USRCFLAGS=-I/sw/include USRLDFLAGS=-L/sw/lib.

2. Installing SCIP

After compiling you can install the headers, the libraries, and the binary. You do that by running the command:

make install INSTALLDIR=<directory>

where you substitute

  • INSTALLDIR= to install in current directory (default)
  • INSTALLDIR=/usr/local to install the headers (/usr/local/include/), the libraries (/usr/local/lib/), and binary (/usr/local/bin/) in the directory /usr/local

For un-installing SCIP there exist the target uninstall which can be used in the same way as install.

3. Instructions for manually creating the soft-links, if the query script fails:

Create necessary soft-links in the lib/static and lib/include/ subdirectories of SCIP:

a) to use SOPLEX (Version >= 1.4.0)

For each used operating system and architecture:

ln -s <path to SOPLEX' *.h files> <path to SCIP>/lib/include/spxinc
ln -s <file libsoplex.[...].a> <path to SCIP>/lib/static/libsoplex.$(OSTYPE).$(ARCH).$(COMP).a

For example:

cd scip
ln -s /soplex/lib/libsoplex.linux.x86_64.gnu.opt.a lib/static/libsoplex.linux.x86_64.gnu.a

Warning! The .opt in the name of the SOPLEX library does not appear in the name of the soft-link.

b) to use CPLEX (Version >= 10.0)

For each used operation system and architecture:

ln -s <path to directory of cplex.h> <path to SCIP>/lib/include/cpxinc
ln -s <file libcplex.a> <path to SCIP>/lib/static/libcplex.$(OSTYPE).$(ARCH).$(COMP).a

For example:

cd scip
ln -s /cplex121/include/ilcplex lib/include/cpxinc
ln -s /cplex121/lib/x86-64_debian4.0_4.1/static_pic/libcplex.a lib/static/libcplex.linux.x86.gnu.a

c) to use Gurobi

For each used operation system and architecture:

ln -s <path to the include directory of Gurobi> <path to SCIP>/lib/include/grbinc
ln -s <file libgurobi81.so> <path to SCIP>/lib/shared/libgurobi.$(OSTYPE).$(ARCH).$(COMP).so

For example:

cd scip
ln -s /gurobi81/linux64/include lib/include/grbinc
ln -s /gurobi81/linux64/lib/libgurobi81.so lib/shared/libgurobi.linux.x86_64.gnu.so

d) to use XPRESS

For each used operation system and architecture:

ln -s <path to directory of xprs.h> <path to SCIP>/lib/include/xprsinc
ln -s <file libxprs.a> <path to SCIP>/lib/static/libxprs.$(OSTYPE).$(ARCH).$(COMP).a

For example:

cd scip
ln -s /xpressmp/include lib/include/xprsinc
ln -s /xpressmp/lib/libxprs.a lib/static/libxprs.linux.x86.gnu.a

e) to use MOSEK

For each used operation system and architecture:

ln -s <path to directory of mosek.h> <path to SCIP>/lib/include/mskincn
ln -s <file libmosek.so> <path to SCIP>/lib/shared/libmosek.$(OSTYPE).$(ARCH).$(COMP).so

For example:

cd scip
ln -s /mosek/8/tools/platform/linux64x86/h lib/include/mskinc
ln -s /mosek/8/tools/platform/linux64x86/bin/libmosek64.so lib/shared/libmosek.linux.x86_64.gnu.so

f) to use CLP

For each used operating system and architecture:

ln -s <path to Clp main directory> <path to SCIP>/lib/include/libclp.$(OSTYPE).$(ARCH).$(COMP).$(LPSOPT)

For example:

cd scip
ln -s /Coin-Clp lib/include/libclp.linux.x86.gnu.opt

g) to use Glop

ln -s <path to OR-Tools main directory> <path to SCIP>/shared/ortools

For example:

cd scip
ln -s /ortools lib/shared/ortools

h) to use ZIMPL

Use ZIMPL as additional file reader for reading *.zpl files:

mkdir <path to SCIP>/lib/include/zimplinc
ln -s <path to ZIMPL's *.h files> <path to SCIP>/lib/include/zimplinc/zimpl
ln -s <file libzimpl-<version>.<options>.a> <path to SCIP>/lib/static/libzimpl.$(OSTYPE).$(ARCH).$(COMP).a

Note that ZIMPL needs the GNU multiprecision library (GMP) to be installed on your system.

i) to use IPOPT as NLP solver

ln -s <path to IPOPT installation> <path to SCIP>/lib/ipopt.$(OSTYPE).$(ARCH).$(COMP).$(IPOPTOPT)
(e.g. `cd scip; ln -s /Ipopt lib/shared/ipopt.linux.x86.gnu.opt

The path to the IPOPT installation is the path under where the Ipopt build has been installed. It should contain the directories include/coin-or with the Ipopt header files, the directory lib with the Ipopt libraries, and the file lib/pkgconfig/ipopt.pc.

j) to use WORHP as NLP solver

ln -s <path to WORHP installation> <path to SCIP>/lib/shared/worhp.$(OSTYPE).$(ARCH).$(COMP).$(WORHPOPT)

For example:

cd scip
ln -s /Worhp lib/shared/worhp.linux.x86.gnu.opt

The path to the WORHP installation is the path under where the Worhp build has been installed. It should contain the directories include/worhp with the WORHP header files and the directory lib with the WORHP libraries.

k) to use FilterSQP as NLP solver

ln -s <path to FilterSQP library> <path to SCIP>/lib/libfiltersqp.$(OSTYPE).$(ARCH).$(COMP).a
ln -s <path to BQPD library> <path to SCIP>/lib/libbqpd.$(OSTYPE).$(ARCH).$(COMP).a

Make sure to replace the paths with your installation location.

l) to use GAMS

ln -s <path to GAMS system directory> <path to SCIP>/lib/shared/gams.$(OSTYPE).$(ARCH).$(COMP)

Make sure to replace the paths with your installation location.

m) to use HiGHS

export LIBRARY_PATH=<path to HiGHS>/lib
export LD_LIBRARY_PATH=<path to HiGHS>/lib

4. Run SCIP

To run SCIP enter bin/scip..... (e.g. bin/scip.linux.x86.gnu.opt.spx) or just bin/scip for the last compiled version

5. Generate documentation

To generate the documentation, you need to have doxygen installed, and enter make doc.

6. Check Code with (pc)lint

To check the code with lint, you need to have flexelint installed, and enter make lint. If you have pclint installed, enter make pclint.

7. Run a short test

To run a short test, enter make [options] test with the same options with which you compiled SCIP in step 1. If you use EXPRINT=none, a few MINLP instances might be aborted. If you use LPS=none, many instances will fail or take ages to be solved.

Further targets

The SCIP makefile supports several targets (used via make ... "target"):

target description
all (or no target) Build SCIP library and binary.
links Reconfigures the links in the lib directory.
doc Creates documentation in the doc directory.
clean Removes all object files.
depend Updates dependencies files. This is only needed if you add checks for preprocessor-defines WITH_* in source files.
check or test. Runs the check script.
lint Statically checks the code via flexelint. The call produces the file lint.out which contains all the detected warnings.
tags Generates tags which can be used in the editor emacs and xemacs.

The SCIP makefiles are structured as follows.

  • Makefile This is the basic makefile in the SCIP root directory. It loads additional makefile information depending on the parameters set.
  • make/make.project This file contains definitions that are useful for all codes that use SCIP, for instance, the examples.
  • make.\<sys\>.\<machine\>.\<compiler\>.\<dbg|opt|prf|opt-gccold\> These file contain system/compiler specific definitions. If you have an unsupported compiler, you can copy one of these and modify it accordingly.

If your platform or compiler is not supported by SCIP you might try and copy one of the existing makefiles in the make directory and modify it. If you succeed, we are always interested in including more Makefiles into the system.

Examples

Example 1 (defaults: SoPlex, with ZIMPL support):

Typing make uses SoPlex as LP solver and includes support for the modeling language ZIMPL. You will be asked the following questions on the first call to make (example answers are already given):

make[1]: Entering directory '/sw/scip'
** creating softlinks: LPS=spx OSTYPE=linux ARCH=x86 COMP=gnu SUFFIX= ZIMPL=true ZIMPLOPT=opt IPOPT=false IPOPTOPT=opt EXPRINT=cppad
** creating directory 'lib/zimplinc'
** missing soft-link 'lib/spxinc'
** enter soft-link target file or directory for 'lib/spxinc' (return if not needed): /sw/soplex/src
-> creating softlink 'lib/spxinc' -> '/sw/soplex/src'
** missing soft-link 'lib/libsoplex.linux.x86.gnu.a'
** enter soft-link target file or directory for 'lib/libsoplex.linux.x86.gnu.a' (return if not needed): /sw/soplex/lib/libsoplex.linux.x86.gnu.opt.a
-> creating softlink 'lib/libsoplex.linux.x86.gnu.a' -> '/sw/soplex/lib/libsoplex.linux.x86.gnu.opt.a'
** missing soft-link 'lib/libsoplex.linux.x86.gnu.so'
** this soft-link is not necessarily needed since 'lib/libsoplex.linux.x86.gnu.a' already exists - press return to skip
** enter soft-link target file or directory for 'lib/libsoplex.linux.x86.gnu.so' (return if not needed):
-> skipped creation of softlink 'lib/libsoplex.linux.x86.gnu.so'. Call 'make links' if needed later.
** missing soft-link 'lib/zimplinc/zimpl'
** enter soft-link target file or directory for 'lib/zimplinc/zimpl' (return if not needed): /sw/zimpl/src
-> creating softlink 'lib/zimplinc/zimpl' -> '/sw/zimpl/src'
** missing soft-link 'lib/libzimpl.linux.x86.gnu.a'
** enter soft-link target file or directory for 'lib/libzimpl.linux.x86.gnu.a' (return if not needed): /sw/zimpl/lib/libzimpl.linux.x86.gnu.opt.a
-> creating softlink 'lib/libzimpl.linux.x86.gnu.a' -> '/sw/zimpl/lib/libzimpl.linux.x86.gnu.opt.a'
** missing soft-link 'lib/libzimpl.linux.x86.gnu.so'
** this soft-link is not necessarily needed since 'lib/libzimpl.linux.x86.gnu.a' already exists - press return to skip
** enter soft-link target file or directory for 'lib/libzimpl.linux.x86.gnu.so' (return if not needed):
-> skipped creation of softlink 'lib/libzimpl.linux.x86.gnu.so'. Call 'make links' if needed later.
make[1]: Leaving directory '/sw/scip'

Example 2 (CPLEX, no ZIMPL):

Typing make LPS=cpx ZIMPL=false uses CPLEX as LP solver. You will be asked the following questions on the first call to make (example answers are already given):

make[1]: Entering directory '/sw/scip'
** creating softlinks: LPS=cpx OSTYPE=linux ARCH=x86 COMP=gnu SUFFIX= ZIMPL=false
** missing soft-link 'lib/cpxinc'
** enter soft-link target file or directory for 'lib/cpxinc' (return to skip): /sw/cplex/include/ilcplex
-> creating softlink 'lib/cpxinc' -> '/sw/cplex/include/ilcplex'
** missing soft-link 'lib/libcplex.linux.x86.gnu.a'
** enter soft-link target file or directory for 'lib/libcplex.linux.x86.gnu.a' (return to skip): /sw/cplex/lib/x86_rhel4.0_3.4/static_pic/libcplex.a
-> creating softlink 'lib/libcplex.linux.x86.gnu.a' -> '/sw/cplex/lib/x86_rhel4.0_3.4/static_pic/libcplex.a'
** missing soft-link 'lib/libcplex.linux.x86.gnu.so'
** enter soft-link target file or directory for 'lib/libcplex.linux.x86.gnu.so' (return to skip):
-> skipped creation of softlink 'lib/libcplex.linux.x86.gnu.so'. Call 'make links' if needed later.
make[1]: Leaving directory '/sw/scip'

Example 3 (CLP, IPOPT, no ZIMPL):

Typing make LPS=clp ZIMPL=false IPOPT=true uses CLP as LP solver, and activates the interface to IPOPT. You will be asked the following questions on the first call to make (example answers are already given):

make[1]: Entering directory '/sw/scip'
- Current settings: LPS=clp OSTYPE=linux ARCH=x86_64 COMP=gnu SUFFIX= ZIMPL=false ZIMPLOPT=opt IPOPT=true IPOPTOPT=opt EXPRINT=cppad
* 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' directory.
* For more information and if you experience problems see the 'INSTALL.md' file.
-> 'clp.*' is a directory containing the Clp installation, i.e., 'clp.*/include/coin/ClpModel.hpp' should exist.
-> 'ipopt.*' is a directory containing the ipopt installation, i.e., 'ipopt.*/include/coin/IpIpoptApplication.hpp', 'ipopt.*/lib/libipopt*', ... should exist.
- preparing missing soft-link 'lib/clp.linux.x86_64.gnu.opt':
> Enter soft-link target file or directory for 'lib/clp.linux.x86_64.gnu.opt' (return if not needed):
> /sw/Clp-1.11/build
-> creating softlink 'lib/clp.linux.x86_64.gnu.opt' -> '/sw/Clp-1.11/build'
- preparing missing soft-link 'lib/ipopt.linux.x86_64.gnu.opt':
> Enter soft-link target file or directory for 'lib/ipopt.linux.x86_64.gnu.opt' (return if not needed):
> /sw/ia64_lx26/ipopt-3.12.5/
-> creating softlink 'lib/ipopt.linux.x86_64.gnu.opt' -> '/sw/ia64_lx26/ipopt-3.12.5/'
make[1]: Leaving directory '/sw/scip'

Example 4 (default: SoPlex, IPOPT, WORHP, FILTERSQP):

Typing make IPOPT=true WORHP=true FILTERSQP=true uses SoPlex as LP solver, and activates the interfaces to IPOPT, WORHP, and FilterSQP. You will be asked the following questions on the first call to make (example answers are already given):

- Current settings: LPS=spx2 OSTYPE=linux ARCH=x86_64 COMP=gnu SHARED=false SUFFIX= ZIMPL=false ZIMPLOPT=opt IPOPT=true IPOPTOPT=opt FILTERSQP=true EXPRINT=cppad GAMS=false
* 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.md' file.
-> 'spxinc' is the path to the SoPlex 'src' directory, e.g., '<SoPlex-path>/src'.
-> 'libsoplex.*' is the path to the SoPlex library, e.g., '<SoPlex-path>/lib/libsoplex.linux.x86.gnu.opt.a'
-> 'ipopt.linux.x86_64.gnu.opt' is a directory containing the ipopt installation, i.e., 'ipopt.linux.x86_64.gnu.opt/include/coin/IpIpoptApplication.hpp', 'ipopt.linux.x86_64.gnu.opt/lib/libipopt*', ... should exist.
-> 'libfiltersqp.linux.x86_64.gnu.*' is the path to the filterSQP library.
-> 'libbqpd.linux.x86_64.gnu.*' is the path to the BQPD library.
-> 'worhp.linux.x86_64.gnu.opt' is a directory containing the WORHP installation, i.e., 'worhp.linux.x86_64.gnu.opt/include/worhp/worhp.h' should exist.
> Enter soft-link target file or directory for 'lib/static/ipopt.linux.x86_64.gnu.opt' (return if not needed):
> /sw/ipopt-3.12.5
-> creating softlink 'lib/static/ipopt.linux.x86_64.gnu.opt' -> '/sw/ipopt-3.12.5'
> Enter soft-link target file or directory for 'lib/static/libfiltersqp.linux.x86_64.gnu.a' (return if not needed):
> /sw/libfiltersqp.a
-> creating softlink 'lib/static/libfiltersqp.linux.x86_64.gnu.a' -> '/sw/libfiltersqp.a'
> Enter soft-link target file or directory for 'lib/static/libbqpd.linux.x86_64.gnu.a' (return if not needed):
> /sw/libbqpd.a
-> creating softlink 'lib/static/libbqpd.linux.x86_64.gnu.a' -> '/sw/libbqpd.a'
> Enter soft-link target file or directory for 'lib/static/worhp.linux.x86_64.gnu.opt' (return if not needed):
> /sw/worhp-2.0
-> creating softlink 'lib/static/worhp.linux.x86_64.gnu.opt' -> '/sw/worhp-2.0'
make[1]: Leaving directory '/sw/scip'

Note on how to (locally) install CLP:

  • create a target directory for the installation, e.g. clp-build (this is the directory SCIP has to link to)
  • from within clp-build, run the configure script of coin-Clp, followed by make install

If you ever need to modify the soft-link targets, delete the soft-links in the lib/ subdirectory and enter make links to generate them again.

After the soft-links have been created, the compilation of the source files should start.

Compilation problems

If the soft-link query script does not work on your machine, read step 2 for instructions on manually creating the soft-links.

No rule to make target lib/???

If you get an error message of the type

make: *** No rule to make target 'lib/???', needed by 'obj/O.linux.x86.gnu.opt/lib/scip/???.o'. Stop.

the corresponding soft-link was not created or points to a wrong location. Check the soft-link targets in the lib/include, lib/static, lib/shared subdirectories. Try to delete all soft-links from those directories and call make links to generate them again. If this still fails, read step 2 for instructions on manually creating the soft-links.

No rule to make target make/make

If you get an error message of the type

make: *** No rule to make target 'make/make.?.?.?.?.?'. Stop.

the corresponding machine dependent makefile for your architecture and compiler is missing. Create one of the given name in the make/ subdirectory. You may take make/make.linux.x86.gnu.opt or any other file in the make subdirectory as example.

No support for remove_history call

The readline library seems to differ slightly on different OS distributions. Some versions do not support the remove_history() call. In this case, you have to either add -DNO_REMOVE_HISTORY to the FLAGS in the appropriate make/make.* file, or to compile with make USRFLAGS=-DNO_REMOVE_HISTORY. Make sure, the file src/scip/dialog.c is recompiled. If this doesn't work either, disable the readline library with make READLINE=false.

No support for sigaction method

On some systems, the sigaction() method is not available. In this case, you have to either add -DNO_SIGACTION to the FLAGS in the appropriate make/make.* file, or to compile with make USRFLAGS=-DNO_SIGACTION. Make sure, the file src/scip/interrupt.c is recompiled.

No support for rand_r method

On some systems, the rand_r() method is not available. In this case, you have to either add -DNO_RAND_R to the FLAGS in the appropriate make/make.* file, or to compile with make USRFLAGS=-DNO_RAND_R. Make sure, the file src/scip/misc.c is recompiled.

No support for strtok_r method

On some systems, the strtok_r() method is not available. In this case, you have to either add -DNO_STRTOK_R to the FLAGS in the appropriate make/make.* file, or to compile with make USRFLAGS=-DNO_STRTOK_R. Make sure, the file src/scip/misc.c is recompiled.

No support for strerror_r method

On some systems, the strerror_r() method is not available. In this case, you have to either add -DNO_STRERROR_R to the FLAGS in the appropriate make/make.* file, or to compile with make USRFLAGS=-DNO_STRERROR_R. Make sure, the file src/scip/misc.c is recompiled.

No support for read command

On some systems, the option [-e] is not available for the read command. You have to compile with READ=read.

Problems with Clp

In some situations, it may be necessary to adjust the flags for linking against Clp. SCIP's makefile tries to find the file clp_addlibs.txt, which specifies the needed libraries. The first thing you should check is whether clp_addlibs.txt is present at in path libclp.*/share/coin/doc/Clp/ (you may have to correct this path for some Clp versions). If this file is not present in your Clp version, SCIP tries to guess the paths and libraries: it assumes that Blas and Lapack are installed as system libraries (libblas.a, liblapack.a) and are not build into the CoinUtils library. If that is different in your build of Clp, you may have to remove lapack from the LPSLDFLAGS in Makefile or make.project. Also removing bz2 may help in some cases.

Compiler or linker errors

If you encounter other compiler or linker errors, you should recompile with make VERBOSE=true ... in order to get the full compiler invocation. This might help to fix the corresponding machine dependent makefile in the make subdirectory.

Remarks on Installing under Windows using MinGW

To build your own Windows binaries under Windows, we recommend using the MinGW-Compiler with MSYS from mingw.org.

First install MSYS, then MinGW to the mingw folder inside the msys folder. Now you need to install the following packages to the mingw folder:

  • zlib (or use ZLIB=false)
  • pcre (or use ZIMPL=false since pcre is needed for ZIMPL and ZIMPL-support in SCIP)
  • gmplib (or use ZIMPL=false since gmplib is needed for ZIMPL and ZIMPL-support in SCIP)

(After calling make clean in the ZIMPL folder you will also need flex and bison to remake ZIMPL. We recommend NOT to use make clean inside the ZIMPL-folder if you do not have these packages installed.)

You can download these additional packages as precompiled binaries:

  • zlib&pcre
  • gmplib or compile the source on your own from the project homepages:
  • zlib
  • pcre
  • gmplib (The command ./configure --prefix=/mingw ; make ; make install should succeed without problems and installs the packages into the mingw folder.)

Now make READLINE=false should be compiling without errors. Please note that we do NOT support creating the doxygen documentation or readline-usage under Windows.

Since there are no real symlinks in MSYS, the include and library files of SoPlex and ZIMPL are actually copied into the SCIP-lib-folder. When you recompile ZIMPL or SoPlex after compiling SCIP you have to copy the libraries manually into the SCIP-lib-folder and recompile SCIP afterwards.