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noahmetzger edited this page Apr 4, 2018 · 4 revisions

These instructions show how to build Tesseract for Windows using a build standard based on the GNU autotools. Other methods use cmake with either the GNU compiler or Microsoft Visual Studio. Those other methods are not covered here.

Cross building from Debian GNU Linux

Cross building means that we compile on Linux, but the resulting programs will run on Windows. This is our preferred way to build Tesseract for Windows because it is much faster than a native build on Windows. The instructions here are for Debian GNU Linux, but also work for other Debian based Linux distributions like for example Ubuntu. Other Linux distributions need more or less modifications of these instructions.

Preconditions

Several packages are needed to allow builds with the GNU autotools and GNU compilers. Let's make sure that we have installed them:

apt install automake build-essentials

In addition, we need the cross tools for building Windows programs:

apt install mingw-w64 mingw-w64-tools

Finally, several pre-compiled libraries for Windows are needed. Those libraries are not part of Debian GNU Linux, so we use Cygwin packages which were converted to Debian packages. TODO.

for p in mingw64-i686-giflib mingw64-i686-jbigkit mingw64-i686-libjpeg-turbo \
         mingw64-i686-libpng mingw64-i686-libwebp mingw64-i686-openjpeg2 \
         mingw64-i686-tiff mingw64-i686-xz mingw64-i686-zlib; do
    dpkg -i ${p}_*.deb
done

Get and build Leptonica

cd $HOME
mkdir -p src/github/DanBloomberg
cd src/github/DanBloomberg
git clone https://github.com/DanBloomberg/leptonica.git
cd leptonica
./autobuild
mkdir -p bin/ndebug/i686-w64-mingw32
cd bin/ndebug/i686-w64-mingw32
../../../configure  --host=i686-w64-mingw32 --prefix=/usr/i686-w64-mingw32 CFLAGS='-Wall -Wextra -pedantic -g -O2'
make
sudo make install

Get and build Tesseract

Install Leptonica first.

Finally, several pre-compiled libraries for Windows are needed. Those libraries are not part of Debian GNU Linux, so we use Cygwin packages which were converted to Debian packages.

dpkg -i mingw64-i686-bzip2_1.0.6-4_all.deb mingw64-i686-cairo_1.14.12-1_all.deb \
        mingw64-i686-expat_2.2.2-1_all.deb mingw64-i686-fontconfig_2.12.6-1_all.deb \
        mingw64-i686-freetype2_2.6.5-1_all.deb mingw64-i686-gettext_0.19.8.1-2_all.deb \
        mingw64-i686-glib2.0_2.54.3-1_all.deb mingw64-i686-harfbuzz_1.7.4-1_all.deb \
        mingw64-i686-icu_57.1-2_all.deb \
        mingw64-i686-libffi_3.2.1-1_all.deb mingw64-i686-lzo2_2.08-1_all.deb \
        mingw64-i686-pango1.0_1.40.14-1_all.deb mingw64-i686-pcre_8.40-3_all.deb \
        mingw64-i686-pixman_0.34.0-1_all.deb mingw64-i686-win-iconv_0.0.6-2_all.deb

TODO.

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