Problem compiling tesseract 4.0 on macOS

Ning Zhao

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Jun 4, 2018, 10:03:19 AM6/4/18

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I'm trying to install tesseract 4.0 on macOS High Sierra from source following https://github.com/tesseract-ocr/tesseract/wiki/Compiling#macos (macOS with Homebrew part).

When I did the `make -j` part, after popping up over 1000 lines of output, it gave me these lines at the end:

1296 /bin/sh ../../libtool --tag=CXX --mode=link g++ -g -O2 -std=c++11 -L/u sr/local/opt/icu4c/lib -o tesseract tesseract-tesseractmain.o libtesseract. la -L/usr/local/Cellar/leptonica/1.76.0/lib -llept

1297 libtool: link: g++ -g -O2 -std=c++11 -o .libs/tesseract tesseract-tesseract main.o -Wl,-bind_at_load -L/usr/local/opt/icu4c/lib ./.libs/libtesseract.d ylib -L/usr/local/Cellar/leptonica/1.76.0/lib -llept

1298 Making all in .

1299 Making all in tessdata

1300 Making all in configs

1301 make[3]: Nothing to be done for `all'.

1302 Making all in tessconfigs

1303 make[3]: Nothing to be done for `all'.

1304 make[3]: Nothing to be done for `all-am'.

1305 Making all in doc

1306 make[2]: Nothing to be done for `all'.

1307 Making all in unittest

1308 make[2]: Nothing to be done for `all'.

The ./configure I used is (I have checked `brew info icu4c` for the two flags):

./configure CPPFLAGS=-I/usr/local/opt/icu4c/include LDFLAGS=-L/usr/local/opt/icu4c/lib

Thinking there might be something wrong happened during the 1300 lines of output, I ran `make -j > makelog`. Although most output went into the log file, these were printed onto the terminal:

/Library/Developer/CommandLineTools/usr/bin/ranlib: file: .libs/libtesseract_cutil.a(cutil_class.o) has no symbols

networkio.cpp:55:15: warning: 'this' pointer cannot be null in well-defined C++

code; comparison may be assumed to always evaluate to true

[-Wtautological-undefined-compare]

ASSERT_HOST(this != nullptr);

^~~~ ~~~~~~~

../../src/ccutil/errcode.h:84:30: note: expanded from macro 'ASSERT_HOST'

#define ASSERT_HOST(x) if (!(x)) \

^

1 warning generated.

/Library/Developer/CommandLineTools/usr/bin/ranlib: file: .libs/libtesseract_lstm.a(tfnetwork.o) has no symbols

/Library/Developer/CommandLineTools/usr/bin/ranlib: file: .libs/libtesseract.a(tfnetwork.o) has no symbols

/Library/Developer/CommandLineTools/usr/bin/ranlib: file: .libs/libtesseract.a(cutil_class.o) has no symbols

/Library/Developer/CommandLineTools/usr/bin/ranlib: file: .libs/libtesseract.a(tfnetwork.o) has no symbols

/Library/Developer/CommandLineTools/usr/bin/ranlib: file: .libs/libtesseract.a(cutil_class.o) has no symbols

I suspect this might give some clue, but I don't really understand what's going on.

I have also tried configure like below, but got the "Nothing to be done for `all'" as well.

./configure CC=gcc CXX=g++ CPPFLAGS=-I/usr/local/opt/icu4c/include LDFLAGS=-L/usr/local/opt/icu4c/lib --prefix=$HOME/miniconda3/envs/ragdoll

Can anyone give me a hand please?

Ning

shree

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Jun 4, 2018, 12:35:36 PM6/4/18

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please see https://github.com/tesseract-ocr/tesseract/issues/1028#issuecomment-394415918

Ning Zhao

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Jun 5, 2018, 8:31:36 PM6/5/18

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Thanks Shree.

I tried what Stefan suggested, but couldn't solve the compiling problem.

However, with `make -j` giving that complaints, the compiled and installed executable seems executable. `tesseract --version` gives

```

tesseract 4.0.0-beta.1-306-g45b11cd

leptonica-1.76.0

libjpeg 9c : libpng 1.6.34 : libtiff 4.0.9 : zlib 1.2.11

Found AVX2

Found AVX

Found SSE

```

`tesseract --list-langs` prints all the language packs I installed as well.

Maybe not a perfect closing to this thread, but I'll use it for now and see what happens.