@noteasy2beme Perhaps can you try
-DCMAKE_INSTALL_DATAROOTDIR=/what/you/want
@agriggio for me, it is ok as it is.
Only my opinion: the hard coding (as for LCP or DCP) is perhaps the best way to avoid future problems (mainly on windows). Should it be applicable also on Linux?
Presently, I cannot really say we can generate a portable version of rawtherapee as explained in Rawpedia. In fact, except the cache and option file, the config folder remains external to the RT directory.
Thus when you copy RT on a USB key and go on an other computer you miss the dynamicprofile.cfg, the profiles dir and batch dir. But nobody seems to worry about that, included me.
@partha was able, I don’t know how, to generate a truly portable version of RT
Thanks for the kind explanation. I was able to change the install directory for the lens database. But even though I used the -DLENSFUNDBDIR=share/lensfun switch when I ran cmake, lensfun simply insisted looking for the database in the directory where it was originally installed.
I wanted to run RT in verbose mode, but I don’t know what exactly to do (could you please explain to me?). What makes the story even funnier is that I’m not to run RT in the console of MinGW. It simply quit, without a single piece of error message. To extract a little more information, I used GDB to run rawtherapee.exe. It turns out that RT exited with code 0xc0000139. Do you happen to know what that code means?
Thanks again and apologize for my ignorance…
Are you aware of lensfun-update-data? That should just grab the latest database suitable for the installed msys2 package.
Yes, I am. But it needs a Python module which can’t be found in the package.
You should open at the options file of RawTherapee (I suppose under %APPDATA%\RawTherapee or something like that), and look at the following:
[Lensfun]
DBDirectory=/path/to/lensfun/db
RT will search for the lensfun database only in /path/to/lensfun/db, unless the config entry is empty, i.e. you see the following:
[Lensfun]
DBDirectory=
In this case, the default DB locations of lensfun will be used.
So, just set the proper DBDirectory to where you have the database (e.g. C:\Program Files\RawTherapee\share\lensfun) and everything should be good.
If not, then you have found a bug 
What RT branch are you building? Is it the last version? In all cases, delete the lensfun paragraph in options file.
In option file, set VERBOSE=true. Execute in mingw console.
I guess that the lensfun DB is not compatible with the lensfun build you use or you did’nt copy the good dll.
Thanks for the kind reply. Besides what you suggested, I found it’s also necessary to clean the cache in order for lensfun to work.
Thanks for the suggestions and explanation.
I guess my system is some kind of messed up. I’ll reinstall MinGW.
last dev build including lensfun
RawTherapee_dev_5.2-187-ga1f86bff_WinVista_64.zip
uploaded at https://drive.google.com/open?id=0B2q9OrgyDEfPS2FpdDAtMVI1RG8
Thanks. Will try it !
Before, my problem was :
With lensfun, I hope most of the profile created will automatch to correct distortion, right?
(except with manual lenses, althoughtin the Raw their is the info of the focal lenght I give the camera…)
Yes if lens profile is in the lensfun data base.
Ver. 5.2-187: in “no-File-Browser” mode, it still can’t load the lensfun database.
You might want to delete the cache.
In options file verify that
[Lensfun]
DBDirectory=
In order lensfun use the DB default location
Just delete the options file (in %APPDATA%\RawTherapee or something like that)
Thank you @noteasy2beme, @gaaned92, @agriggio, I usually delete the options file and cache for new versions, didn’t this time. It works now as expected.
Reviving this thread, now, July 2020, as I’ve recently made my first build on a win10 x64 laptop.
I’ve followed rawpedia instructions until the “Run CMake and Make” section.
But I can’t seem to find anything related to lensfun database; when I run RT-5.8 (dev branch), I can’t select any lens - and the share directory is empty.
~/RT/RawTherapee/build/release
$ ll
total 22624
drwxr-xr-x 1 catya None 0 16 juil. 16:34 .
drwxr-xr-x 1 catya None 0 10 mai 00:22 ..
-rw-r--r-- 1 catya None 733 10 mai 00:01 AboutThisBuild.txt
-rw-r--r-- 1 catya None 1236 9 mai 23:56 AUTHORS.txt
-rw-r--r-- 1 catya None 159083 9 mai 23:56 camconst.json
drwxr-xr-x 1 catya None 0 10 mai 00:22 dcpprofiles
drwxr-xr-x 1 catya None 0 10 mai 00:22 fonts
drwxr-xr-x 1 catya None 0 10 mai 00:22 iccprofiles
drwxr-xr-x 1 catya None 0 10 mai 00:22 images
drwxr-xr-x 1 catya None 0 10 mai 00:22 languages
-rw-r--r-- 1 catya None 33326 9 mai 23:56 LICENSE.txt
drwxr-xr-x 1 catya None 0 10 mai 00:22 licenses
-rw-r--r-- 1 catya None 2086 9 mai 23:56 options
drwxr-xr-x 1 catya None 0 10 mai 00:22 profiles
-rwxr-xr-x 1 catya None 15083188 10 mai 00:22 rawtherapee.exe
-rwxr-xr-x 1 catya None 7597536 10 mai 00:22 rawtherapee-cli.exe
-rw-r--r-- 1 catya None 4666 9 mai 23:56 RELEASE_NOTES.txt
drwxr-xr-x 1 catya None 0 10 mai 00:22 share
drwxr-xr-x 1 catya None 0 10 mai 00:22 sounds
drwxr-xr-x 1 catya None 0 10 mai 00:22 themes
-rw-r--r-- 1 catya None 11332 10 mai 00:01 WindowsInnoSetup.iss
Thanks for your help.
If you run lensfun-update-data from your console you see where the lensfun directory is located. For me this is at C:/msys64/mingw64/var/lib/lensfun-updates/version_1
You need to make sure that the DBDirectory setting in your C:\Users\###\AppData\Local\RawTherapee5-dev\options file points to this folder.