2023.10.25 20:25 "Re: [Tiff] libtiff configure questions on linking to different jpeg shared library name?", by Bob Friesenhahn

We just upgraded to libtiff v4.6.0 and want to build it with our recently added libjpeg-turbo v3.0.0.

Unfortunately we had to symbol version libjpeg-turbo on Linux (on top of its existing symbol versions) to avoid symbol collisions with other libjpeg versions. As part of this work, we slightly modified the libjpeg-turbo shared library name on Linux, Mac, and Windows - for example on Linux, instead of the shared library libjpeg.so.62.4.0, we named it libmwjpeg.so.62.4.0.

The need to do this is most unfortunate. I was wondering about this issue.

In our libtiff makefile, we use configure on Linux and Mac and CMake on Windows. I think I figured out the CMake option to link libtiff to our libjpeg-turbo DLL, but I'm not sure how to modify the libtiff configure scripts to get Linux and Mac to do the same.

I see in the libtiff main folder there's both a configure and configure.ac file, and both have commands that link to libjpeg - "-ljpeg". I tried changing this in both files to "-lmwjpeg" instead but that didn't work. Could you please let me know which file or files I need to modify, and whether I need to manually run autoconf or similar tools after I make the change?

You can run the 'autogen.sh' script at the top of the libtiff source tree. Even better than this, is add the --enable-maintainer-mode option when running the configure script since then the build will take care of itself after you edit a file.

You will need to make sure that Autotools (Autoconf, Automake, and libtool) are installed on your system.

Bob

Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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