tesseract 3.04.01 looks for liblept-4.dll

[Shreeshrii]

I am building tesseract on msys2 on windows. I am using the latest version of leptonica (1.73) which generates liblept-5.dll However, when I run tesseract 3.04.01 it gives the following error.

User@HP MINGW32 ~/tesseract-ocr
$ tesseract -v
C:/msys32/mingw32/bin/tesseract.exe: error while loading shared libraries: liblept-4.dll: cannot open shared object file: No such file or directory

I copied liblept-5.dll as liblept4.dll and was able to run the program - see below.

User@HP MINGW32 ~/tesseract-ocr
$ tesseract -v
tesseract 3.04.01
leptonica-1.73
libgif 5.1.2 : libjpeg 8d (libjpeg-turbo 1.4.2) : libpng 1.6.21 : libtiff 4.0.6 : zlib 1.2.8 : libwebp 0.5.0

Wiki states:
* 3.04 requires at least v1.71 of Leptonica.*

Is 3.04.01 compatible with leptonica 1.73?

[zdenop]

This is not tesseract problem, but problem how you maintain your system. Compiling from source requires you are familiar with your system.
Building tools requires to links against leptonica. And you system (base how you maintain it) says it should link against liblept-4.dll.
Coping liblept-5.dll as liblept-4.dll is very bad idea.
Maintain you system correctly and you will get good result.

[amitdo]

Did you recompile (./configure, make, sudo make install, sudo ldconfig) tesseract after you recompiled leptonica 1.73?

[Shreeshrii]

Yes, I had used a PKGBUILD similar to the following, without the prepare
section. After Zdenko's comment I have added autogen.sh to it also. Need to
build it again to test.

Maintainer: Alexey Pavlov alexpux@gmail.com

Maintainer: Ray Donnelly mingw.android@gmail.com

_realname=tesseract-ocr
pkgbase=mingw-w64-${_realname}
pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
pkgver=3.04.01
pkgrel=2
pkgdesc="Tesseract OCR (mingw-w64)"
arch=('any')
url="https://github.com/tesseract-ocr/tesseract"
license=("Apache License 2.0")
makedepends=("${MINGW_PACKAGE_PREFIX}-gcc"
"${MINGW_PACKAGE_PREFIX}-pkg-config")
depends=(${MINGW_PACKAGE_PREFIX}-cairo
${MINGW_PACKAGE_PREFIX}-gcc-libs
${MINGW_PACKAGE_PREFIX}-icu
${MINGW_PACKAGE_PREFIX}-leptonica
${MINGW_PACKAGE_PREFIX}-pango
${MINGW_PACKAGE_PREFIX}-zlib
${MINGW_PACKAGE_PREFIX}-tesseract-data-eng)

source=(${_realname}-${pkgver}.tar.gz::
https://github.com/tesseract-ocr/tesseract/archive/${pkgver}.tar.gz

https://github.com/tesseract-ocr/tessdata/raw/master/osd.traineddata )
sha256sums=('57f63e1b14ae04c3932a2683e4be4954a2849e17edd638ffe91bc5a2156adc6a'

'9cf5d576fcc47564f11265841e5ca839001e7e6f38ff7f7aacf46d15a96b00ff')

options=('!libtool' 'strip')

prepare() {
cd "${srcdir}/tesseract-${pkgver}"
./autogen.sh
}

build() {
cd "${srcdir}/tesseract-${pkgver}"
[[ -d "${srcdir}"/build-${CARCH} ]] && rm -rf "${srcdir}"/build-${CARCH}
mkdir -p "${srcdir}"/build-${CARCH} && cd "${srcdir}"/build-${CARCH}

local -a extra_config
if check_option "debug" "y"; then
extra_config+=( --enable-debug )
fi

../tesseract-${pkgver}/configure
--build=${MINGW_CHOST}
--host=${MINGW_CHOST}
--target=${MINGW_CHOST}
--prefix=${MINGW_PREFIX}
LIBLEPT_HEADERSDIR=${MINGW_PREFIX}/include
"${extra_config[@]}"

make
}

package() {
cd "${srcdir}/build-${CARCH}"
make DESTDIR="${pkgdir}" install
make training
make DESTDIR="${pkgdir}" training-install

mkdir -p $pkgdir/${MINGW_PREFIX}/share/tessdata
install -Dm0644 $srcdir/osd.traineddata
$pkgdir/${MINGW_PREFIX}/share/tessdata/osd.traineddata
cp $srcdir/tessdata/eng.* $pkgdir/${MINGW_PREFIX}/share/tessdata
cp $srcdir/tessdata/configs/bazaar
$pkgdir/${MINGW_PREFIX}/share/tessdata/configs
find $pkgdir/${MINGW_PREFIX}/share/tessdata -type f -exec chmod 0644 {} ;
}

ShreeDevi

---

भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Wed, Mar 9, 2016 at 12:26 AM, Amit Dovev notifications@github.com
wrote:

Did you recompile (./configure, make, sudo make install, sudo ldconfig)
tesseract after you recompiled leptonica 1.73?

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#258 (comment)
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[zdenop]

rebuilding tesseract does not help unless leptonica instalation is not fixed within msys...

[Shreeshrii]

I have built Leptonica 1.73 on msys2 locally. It is not yet reflected in
Msys2 repository.

ShreeDevi

---

भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Wed, Mar 9, 2016 at 1:05 PM, zdenop notifications@github.com wrote:

rebuilding tesseract does not help unless leptonica instalation is not
fixed within msys...

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#258 (comment)
.

[amitdo]

Do you have liblept.dll?
It should be a symlink to liblept-5.dll

[Shreeshrii]

No liblept.dll.

I have liblept.a and liblept.dll.a in lib directory and liblept-5.dll in
bin directory.

ShreeDevi

---

भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Thu, Mar 10, 2016 at 6:57 PM, Amit Dovev notifications@github.com
wrote:

Do you have liblept.dll?
It should be a symlink to liblept-5.dll

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#258 (comment)
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[amitdo]

As zdenko said, something is wrong with your leptonica installation.

Here are the files in my linux system:

/usr/local/lib/liblept.a
/usr/local/lib/liblept.la
/usr/local/lib/liblept.so symlink to /usr/local/lib/liblept.so.5.0.0
/usr/local/lib/liblept.so.5 symlink to /usr/local/lib/liblept.so.5.0.0
/usr/local/lib/liblept.so.5.0.0

[zdenop]

Real problem is that he has several installation of leptonica but msys instruct linker to use older leptonica version (which could be reasonable if older version was installed by msys packagin system and new version "by hand") . There are several ways how to solve it:

1. Learn how your environment/system is working, how to manage it
2. If 1. is not option - wait for official packages and do to try to compile from source
3. Use only one version of software => do not use packaging system, but compile from source. From my experience, this option will sooner or later lead to the current status (something goes wrong and I have not clue why) ;-).

[amitdo]

Shree,

Here are the commands I ran on Linux:

cd path/to/leptonica-1.73

./configure
make
sudo make install
sudo ldconfig

cd path/to/tesseract-ocr
./autogen.sh
./configure  --enable-debug
make
sudo make install
sudo ldconfig
make training
sudo make training-install

Did you run sudo ldconfig ?

[Shreeshrii]

Amit & Zdenko.

Yes, the problem on msys2 maybe because I am trying to use the PKGBUILD
system for building the software (which is what was recommended by the
msys2 developers when I was trying to build the earlier release by hand).

I was able to build and run 1.73 leptonica and the latest source of
tesseract on ubuntu 14.04 without problems.

Thanks!

ShreeDevi

---

भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Fri, Mar 11, 2016 at 5:41 PM, zdenop notifications@github.com wrote:

Real problem is that he has several installation of leptonica but msys
instruct linker to use older leptonica version (which could be reasonable
if older version was installed by msys packagin system and new version "by
hand") . There are several ways how to solve it:

1. learn how you environment/system is working, how to manage it
2. If 1. is not option - wait for official packages and do to try to
   compile from source
3. Use only one version of software => do not use packaging system,
   but compile from source. From my experience, this option will sooner or
   later lead to the current status (something goes wrong and I have not clue
   why) ;-).

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[Shreeshrii]

I did not run
sudo ldconfig
after building leptonica, but did after building tesseract.

I used the following commands:

./autogen.sh
./configure
LDFLAGS="-L/usr/local/lib" CFLAGS="-I/usr/local/include" make
sudo make install
sudo ldconfig
LDFLAGS="-L/usr/local/lib" CFLAGS="-I/usr/local/include" make training
sudo make training-install

ShreeDevi

---

भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Fri, Mar 11, 2016 at 7:41 PM, Amit Dovev notifications@github.com
wrote:

Shree,

Here are the commands I ran on Linux:

cd path/to/leptonica-1.73

./configure
make
sudo make install
sudo ldconfig

cd path/to/tesseract-ocr
./autogen.sh
./configure --enable-debug
make
sudo make install
sudo ldconfig
make training
sudo make training-install

Did you run sudo ldconfig ?

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#258 (comment)
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[amitdo]

Shree,

About your Compiling wiki edit.

You need to run sudo ldconfig after every time you manually (not with package manager) update, add or remove a shared library (*.so / *.dll).

./autogen.sh
./configure
make
sudo make install
sudo ldconfig

Here sudo ldconfig is needed because sudo make install installed a library - libtesseract.so.3, in your system.

However, sudo ldconfig is not needed after

make training
sudo make training-install

because sudo make training-install only install some programs, but does not install any library.

[amitdo]

http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html

[Shreeshrii]

Thanks, please change the wiki.

ShreeDevi

---

भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com

On Sun, Mar 13, 2016 at 8:24 PM, Amit Dovev notifications@github.com
wrote:

http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html

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#258 (comment)
.