Downloads and compiles Tesseract OCR library for iOS

build_tesseract.sh

#!/bin/sh
# build.sh

GLOBAL_OUTDIR="`pwd`/dependencies"
LOCAL_OUTDIR="./outdir"
LEPTON_LIB="`pwd`/leptonica-1.68"
TESSERACT_LIB="`pwd`/tesseract-3.01"

IOS_BASE_SDK="5.1"
IOS_DEPLOY_TGT="4.3"

setenv_all()
{
	# Add internal libs
	export CFLAGS="$CFLAGS -I$GLOBAL_OUTDIR/include -L$GLOBAL_OUTDIR/lib"
	
	export CXX="$DEVROOT/usr/bin/llvm-g++"
    export CC="$DEVROOT/usr/bin/llvm-gcc"

	export LD=$DEVROOT/usr/bin/ld
	export AR=$DEVROOT/usr/bin/ar
	export AS=$DEVROOT/usr/bin/as
	export NM=$DEVROOT/usr/bin/nm
	export RANLIB=$DEVROOT/usr/bin/ranlib
	export LDFLAGS="-L$SDKROOT/usr/lib/"
	
	export CPPFLAGS=$CFLAGS
	export CXXFLAGS=$CFLAGS
}

setenv_arm6()
{
	unset DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM CXXCPP RANLIB LDFLAGS CPPFLAGS CXXFLAGS
	
	export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer
	export SDKROOT=$DEVROOT/SDKs/iPhoneOS$IOS_BASE_SDK.sdk
	
	export CFLAGS="-arch armv6 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/"
	
	setenv_all
}

setenv_arm7()
{
	unset DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM CXXCPP RANLIB LDFLAGS CPPFLAGS CXXFLAGS
	
	export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer
	export SDKROOT=$DEVROOT/SDKs/iPhoneOS$IOS_BASE_SDK.sdk
	
	export CFLAGS="-arch armv7 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT -I$SDKROOT/usr/include/"
	
	setenv_all
}

setenv_i386()
{
	unset DEVROOT SDKROOT CFLAGS CC LD CPP CXX AR AS NM CXXCPP RANLIB LDFLAGS CPPFLAGS CXXFLAGS
	
	export DEVROOT=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer
	export SDKROOT=$DEVROOT/SDKs/iPhoneSimulator$IOS_BASE_SDK.sdk
	
	export CFLAGS="-arch i386 -pipe -no-cpp-precomp -isysroot $SDKROOT -miphoneos-version-min=$IOS_DEPLOY_TGT"
	
	setenv_all
}

create_outdir_lipo()
{
	for lib_i386 in `find $LOCAL_OUTDIR/i386 -name "lib*\.a"`; do
		lib_arm6=`echo $lib_i386 | sed "s/i386/arm6/g"`
		lib_arm7=`echo $lib_i386 | sed "s/i386/arm7/g"`
		lib=`echo $lib_i386 | sed "s/i386\///g"`
		lipo -arch armv6 $lib_arm6 -arch armv7 $lib_arm7 -arch i386 $lib_i386 -create -output $lib
	done
}

merge_libfiles()
{
	DIR=$1
	LIBNAME=$2
	
	cd $DIR
	for i in `find . -name "lib*.a"`; do
		$AR -x $i
	done
	$AR -r $LIBNAME *.o
	rm -rf *.o __*
	cd -
}

get_leptonica()
{
    curl -C - -O http://www.leptonica.com/source/leptonica-1.68.tar.gz
    tar xzvf leptonica-1.68.tar.gz
}

get_tessreact()
{
    curl -C - -O http://tesseract-ocr.googlecode.com/files/tesseract-3.01.tar.gz
    tar xzvf tesseract-3.01.tar.gz
}


#######################
# DOWNLOAD LIBS
#######################
mkdir $GLOBAL_OUTDIR
get_leptonica
get_tessreact

#######################
# LEPTONLIB
#######################
cd $LEPTON_LIB
rm -rf $LOCAL_OUTDIR
mkdir -p $LOCAL_OUTDIR/arm6 $LOCAL_OUTDIR/arm7 $LOCAL_OUTDIR/i386

make clean 2> /dev/null
make distclean 2> /dev/null
setenv_arm6
./configure --host=arm-apple-darwin6 --enable-shared=no --disable-programs --without-zlib --without-libpng --without-jpeg --without-giflib --without-libtiff
make -j4
cp -rvf src/.libs/lib*.a $LOCAL_OUTDIR/arm6

make clean 2> /dev/null
make distclean 2> /dev/null
setenv_arm7
./configure --host=arm-apple-darwin7 --enable-shared=no --disable-programs --without-zlib --without-libpng --without-jpeg --without-giflib --without-libtiff
make -j4
cp -rvf src/.libs/lib*.a $LOCAL_OUTDIR/arm7

make clean 2> /dev/null
make distclean 2> /dev/null
setenv_i386
./configure --enable-shared=no --disable-programs --without-zlib --without-libpng --without-jpeg --without-giflib --without-libtiff
make -j4
cp -rvf src/.libs/lib*.a $LOCAL_OUTDIR/i386

create_outdir_lipo
mkdir -p $GLOBAL_OUTDIR/include/leptonica && cp -rvf src/*.h $GLOBAL_OUTDIR/include/leptonica
mkdir -p $GLOBAL_OUTDIR/lib && cp -rvf $LOCAL_OUTDIR/lib*.a $GLOBAL_OUTDIR/lib
cd ..


#######################
# TESSERACT-OCR (v3)
#######################
cd $TESSERACT_LIB
rm -rf $LOCAL_OUTDIR
mkdir -p $LOCAL_OUTDIR/arm6 $LOCAL_OUTDIR/arm7 $LOCAL_OUTDIR/i386

make clean 2> /dev/null
make distclean 2> /dev/null
setenv_arm6
bash autogen.sh
./configure --host=arm-apple-darwin6 --enable-shared=no LIBLEPT_HEADERSDIR=$GLOBAL_OUTDIR/include/
make -j4
for i in `find . -name "lib*.a"`; do cp -rvf $i $LOCAL_OUTDIR/arm6; done
merge_libfiles $LOCAL_OUTDIR/arm6 libtesseract_all.a

make clean 2> /dev/null
make distclean 2> /dev/null
setenv_arm7
bash autogen.sh
./configure --host=arm-apple-darwin7 --enable-shared=no LIBLEPT_HEADERSDIR=$GLOBAL_OUTDIR/include/
make -j4
for i in `find . -name "lib*.a" | grep -v arm`; do cp -rvf $i $LOCAL_OUTDIR/arm7; done
merge_libfiles $LOCAL_OUTDIR/arm7 libtesseract_all.a

make clean 2> /dev/null
make distclean 2> /dev/null
setenv_i386
bash autogen.sh
./configure --enable-shared=no LIBLEPT_HEADERSDIR=$GLOBAL_OUTDIR/include/
make -j4
for i in `find . -name "lib*.a" | grep -v arm`; do cp -rvf $i $LOCAL_OUTDIR/i386; done
merge_libfiles $LOCAL_OUTDIR/i386 libtesseract_all.a

create_outdir_lipo
mkdir -p $GLOBAL_OUTDIR/include/tesseract
tess_inc=( api/apitypes.h api/baseapi.h ccmain/thresholder.h ccstruct/publictypes.h ccutil/errcode.h
           ccutil/genericvector.h ccutil/helpers.h ccutil/host.h ccutil/ndminx.h ccutil/ocrclass.h
           ccutil/platform.h ccutil/tesscallback.h ccutil/unichar.h )
for i in "${tess_inc[@]}"; do
   cp -rvf $i $GLOBAL_OUTDIR/include/tesseract
done
mkdir -p $GLOBAL_OUTDIR/lib && cp -rvf $LOCAL_OUTDIR/lib*.a $GLOBAL_OUTDIR/lib
make clean 2> /dev/null
make distclean 2> /dev/null
rm -rf $LOCAL_OUTDIR
cd ..

echo "Finished!"