Tags: gis, grass gis, how-to, ms windows

How to compile GRASS GIS on MS Windows

There is a great wiki page that explains step-by-step procedures on how to compile GRASS GIS on MS Windows, but it requires the installation of Visual Studio and installs compiled GRASS GIS into the OSGeo4W directory structure. Since I just wanted to compile and run it from the Git repository, I needed to slightly modify the steps in the wiki page.

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Contents

1 Install OSGeo4W
2 Install MSYS2
3 Compile GRASS GIS

1 Install OSGeo4W

Download and run the OSGeo4W installer (32-bit or 64-bit)
Advanced Install, Next
Install from Internet, Next
C:\OSGeo4W (32-bit) or C:\OSGeo4W64 (64-bit), Next
Next
Direct Connection, Next
Select a download site, Next
Install the following packages:
- cairo
- fftw
- fftw-devel (32-bit only)
- freetype-devel
- freetype-devel-mingw (32-bit only)
- gdal-ecw
- gdal-mrsid
- liblas-devel
- libxdr
- pdcurses
- python3-pywin32
- python3-wx
- regex-devel
- wxpython
- zstd-devel
The following packages are required by GRASS GIS, but they will be automatically installed by dependency.
- gdal
- geos
- iconv
- libjpeg
- libpng
- libpq
- libtiff
- proj
- sqlite3
- zlib
- zstd

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2 Install MSYS2

Download and run the MSYS2 installer (as of July 9, 2019, 32-bit or 64-bit)
Next
C:\msys32 (32-bit) or C:\msys64 (64-bit), Next
Next
Uncheck Run MSYS2 32bit now (32-bit) or Run MSYS2 64bit now (64-bit), Finish
Run MSYS2 MinGW 32-bit (32-bit) or MSYS2 MinGW 64-bit (64-bit)

Install the following packages (both 32-bit and 64-bit)

pacman -S tar libintl make bison diffutils git dos2unix zip

Install these packages

32-bit:

pacman -S mingw-w64-i686-toolchain mingw-w64-i686-cairo mingw-w64-i686-python3-numpy mingw-w64-i686-python3-six mingw-w64-i686-sqlite3 mingw-w64-i686-xz mingw-w64-i686-lz4

64-bit:

pacman -S mingw-w64-x86_64-toolchain mingw-w64-x86_64-cairo mingw-w64-x86_64-python3-numpy mingw-w64-x86_64-python3-six mingw-w64-x86_64-sqlite3 mingw-w64-x86_64-xz mingw-w64-x86_64-lz4

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3 Compile GRASS GIS

Add two export lines to ~/.bash_profile by running

32-bit:

cat <<EOT >> ~/.bash_profile
export LC_ALL=C
export PATH="$PATH:/c/osgeo4w/bin"
EOT

64-bit:

cat <<EOT >> ~/.bash_profile
export LC_ALL=C
export PATH="$PATH:/c/osgeo4w64/bin"
EOT

Source ~/.bash_profile
```
. ~/.bash_profile
```

Checkout the GRASS GIS Git repository

mkdir -p ~/usr/grass
cd ~/usr/grass
git clone https://github.com/OSGeo/grass.git

Download myconfigure.sh, mymake.sh, and mkbats.sh in ~/usr/grass

Configure and compile GRASS GIS

cd ~/usr/grass/grass
../myconfigure.sh
../mymake.sh

Create batch files for MS Windows in ~/usr/grass/bin
```
../mkbats.sh
```
Create a shortcut to C:\msys64\home\USERNAME\usr\grass\bin\grass77.bat and change the icon to C:\msys64\home\USERNAME\usr\grass\grass\mswindows\grass.icon

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References

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