Supported Operating Systems

	32 bit	64 bit	Supported Extensions	Comments
Ubuntu 18.04		yes	GMP, hmetis, bliss
Debian 9		yes	GMP, hmetis, bliss
macOS Catalina	-	yes	GMP, hmetis
Windows 10 (WSL, Ubuntu 18.04/20.04)		yes	GMP, hmetis, bliss
Windows 10 (Visual Studio)		yes (with WSL)		tested with Visual Studio 2017
Windows 10 (minGW)

For Windows, please also refer to our Windows Installation Guide .

Supported Compilers

Compiler	Support
gcc	yes

Supported File Formats

Problem file formats

GCG supports all file formats supported by SCIP to read in problems, solution, etc. The original problem can for example be read in as:

.lp
.mps
.cip

files.

Decomposition file formats

If GCG is not able to automatically detect a structure suitable to perform a Dantzig-Wolfe reformulation, you need to specify the structure yourself and make it available to GCG. There are some file formats for structure information. Currently, GCG supports

.dec
.blk

files. They are documented in reader_dec.h and reader_blk.h, respectively. You can find examples for dec as well as blk files in the check/instances/ directory.

Automatic decomp-file adding

During detection, GCG will automatically detect similiarly named .dec-files if they are located in the same directory. To prevent that, set the corresponding mode (for make test, see Makefiles Arguments).