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GEOS -- Geometry Engine, Open Source
====================================
Project homepage: http://geos.osgeo.org/
## Build status
| branch / CI | Debbie | Winnie | Dronie | Travis CI | GitLab CI | AppVeyor |
|:--- |:--- |:--- |:--- |:--- |:--- |:--- |
| svn-trunk | [](https://debbie.postgis.net/view/GEOS/job/GEOS_Trunk/) | [](https://debbie.postgis.net:444/view/GEOS/job/GEOS_matrix_trunk/) | [](https://drone.osgeo.org/geos/geos?branch=svn-trunk) | [](https://travis-ci.org/OSGeo/geos?branch=svn-trunk) | [](https://gitlab.com/geos/libgeos/commits/svn-trunk) | [](https://ci.appveyor.com/project/OSGeo/geos/branch/svn-trunk) |
| svn-3.6 | [](https://debbie.postgis.net/view/GEOS/job/GEOS_Branch_3.6/) | [](https://debbie.postgis.net:444/view/GEOS/job/GEOS_matrix_branch_3.6/) | [](https://drone.osgeo.org/geos/geos?branch=svn-3.6) | [](https://travis-ci.org/OSGeo/geos?branch=svn-3.6) | [](https://gitlab.com/geos/libgeos/commits/svn-3.6) | [](https://ci.appveyor.com/project/OSGeo/geos/branch/svn-3.6) |
More on: https://trac.osgeo.org/geos#BuildandInstall
## Building, testing, installing
### Unix
Using Autotools:
./autogen.sh # in ${srcdir}, if obtained from SVN or GIT
${srcdir}/configure # in build dir
Using CMake:
cmake ${srcdir} # in build dir
Now, all versions:
make
make check
make install # as root
ldconfig # as root
### Microsoft Windows
If you use Microsoft Visual C++ (7.1 or later) compiler, you can build
GEOS using NMAKE program and provided `makefile.vc` files.
If you are building from SVN or GIT checkout, first run: `autogen.bat`
Then:
nmake /f makefile.vc MSVC_VER=1400
where 1400 is version number of Visual C++ compiler, here Visual C++ 8.0
from Visual Studio 2005 (supported versions are 1300, 1310, 1400, 1500,
1600, 1700, 1800 and 1900).
The bootstrap.bat step is required to generate a couple of header files.
In order to build debug configuration of GEOS, additional flag `DEBUG=1`
is required:
nmake /f makefile.vc MSVC_VER=1400 DEBUG=1
## Client applications
### Using the C interface (recommended)
To compile programs against the C lib (recommended):
CFLAGS += `geos-config --cflags`
LDFLAGS += `geos-config --ldflags` -lgeos_c
#include <geos_c.h>
Example usage:
capi/geostest.c contains basic usage examples.
### Using the C++ interface (discouraged)
NB: The C++ interface should not be used directly; the GEOS project
views it as a bug for another program to use the C++ interface or even
to directly link against the C++ library. The C++ library name will
change on every minor release because it is too hard to know if there
have been ABI changes. (The C library uses the C++ interface, but the
C library follows normal ABI-change-sensitive versioning, so programs
that link only against the C library should work without relinking
when GEOS is upgraded.)
To compile programs against the C++ lib:
CFLAGS += `geos-config --cflags`
LDFLAGS += `geos-config --ldflags` -lgeos
#include <geos.h>
Basic usage examples can be found in `doc/example.cpp`.
### Scripting language bindings
Ruby bindings are fully supported. To build, use the `--enable-ruby` option
when configuring:
./configure ... --enable-ruby
Since version 3.6.0 PHP bindings are not included in the core
library anymore but available as a separate project:
https://git.osgeo.org/gogs/geos/php-geos
Since version 3.0, the Python bindings are unsupported. Recommended options:
1. Become or recruit a new maintainer.
2. Use [Shapely](http://pypi.python.org/pypi/Shapely) with Python
versions 2.4 or greater.
3. Simply call functions from `libgeos_c` via Python ctypes.
## Documentation
To build Doxygen documentation:
cd doc
make doxygen-html