tesseract @3.0.5: library name is wrong, pkg-config file has wrong contents

[mainka (Jérôme Mainka)]

After a port selfupdate and a port upgrade outdated command, port rev-upgrade gives the following error message:

Could not open /opt/local/lib/libtesseract.3.dylib: Error opening or reading file (referenced from /opt/local/lib/libopencv_text.3.3.1.dylib)

The installed files are:

$ port contents tesseract
Port tesseract contains:
<snip>
  /opt/local/lib/liblibtesseract.dylib
  /opt/local/lib/liblibtesseract.3.0.5.dylib

Notice the liblib prefix and the missing libtesseract.3.dylib.

pkg-config seems ill-configured too:

$ pkg-config --libs tesseract
-L/opt/local/lib -ltesseract_OUTPUT_NAME-NOTFOUND

So, opencv cannot be rebuilt.

[mainka (Jérôme Mainka)]

port contents tesseract result

[markemer (Mark Anderson)]

Does tesseract itself run?

[mainka (Jérôme Mainka)]

Yes. (At least, it seems so, because I don't use tesseract). The binary is linked to the curious library name.

$ otool -L /opt/local/bin/tesseract
/opt/local/bin/tesseract:
	/opt/local/lib/liblibtesseract.3.0.5.dylib (compatibility version 3.0.5, current version 3.0.5)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1238.60.2)
	/opt/local/lib/liblept.5.dylib (compatibility version 6.0.0, current version 6.1.0)
	/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 307.5.0)

[markemer (Mark Anderson)]

Yeah mine is working too, and it's installing stuff in /opt/local/cmake despite PortGroup cmake 1.1 saying it should be in /opt/local/share/cmake or something.

[markemer (Mark Anderson)]

Also, what variants do you have opencv installed with?

[mainka (Jérôme Mainka)]

Replying to markemer:

Also, what variants do you have opencv installed with?

$ port -v installed opencv
The following ports are currently installed:
  opencv @3.3.1_1+contrib+python35 (active) platform='darwin 16' archs='x86_64' date='2017-12-20T10:59:42+0100'

[ryandesign (Ryan Carsten Schmidt)]

Certainly, the filename liblibtesseract.3.0.5.dylib that the tesseract port installs is wrong in two respects:

1. The "lib" prefix should not appear twice
2. The version number in the filename should be the major version only, e.g. 3

Since the library name has already changed in 3.0.5, and will change again when the above problems are fixed, all ports that link with the library need to be rebuilt by increasing their revision. According to my search, the only affected port should be olena with the +scribo variant.

opencv does not declare a dependency on tesseract, but on Jérôme's system, it apparently uses it. We need to discover why it does that, and either add a tesseract dependency to opencv, or prevent opencv from using tesseract even if tesseract is installed.

[ryandesign (Ryan Carsten Schmidt)]

Replying to ryandesign:

opencv does not declare a dependency on tesseract, but on Jérôme's system, it apparently uses it. We need to discover why it does that, and either add a tesseract dependency to opencv, or prevent opencv from using tesseract even if tesseract is installed.

It comes from opencv's +contrib variant.

[stromnov (Andrey Stromnov)]

"Fix library being named liblibtesseract on non win32 platforms" - ​https://github.com/tesseract-ocr/tesseract/pull/1100/commits/52cac3a42ef2b823b9367b9ee2d1d84f8eda4ea0

[markemer (Mark Anderson)]

So, should I bump to 4.0 something which will include all of the fixes? It seems like 03.05.01 was released broken.

In the meantime is there a way to apply 52cac3a42ef2b823b9367b9ee2d1d84f8eda4ea0 from github, or should I just make a CMakefile.txt.patch

[markemer (Mark Anderson)]

Thanks, I'm searching for a pkgconfig fix too, I think it's in here somewhere.

Replying to stromnov:

"Fix library being named liblibtesseract on non win32 platforms" - ​https://github.com/tesseract-ocr/tesseract/pull/1100/commits/52cac3a42ef2b823b9367b9ee2d1d84f8eda4ea0

[dliessi (Davide Liessi)]

In 59f9d9c9e3988a5b287f44d8b2149641d205cfe5/macports-ports (master):

tesseract: use C++11; fix mtree violation, lib name

Patchfile patch-fix-library-name.diff is commit
52cac3a42ef2b823b9367b9ee2d1d84f8eda4ea0
from ​https://github.com/tesseract-ocr/tesseract

Fixes #56059