Why use an -march instead of a feature (-msse4) ?
@heckflosse Is there a play by play for this? I’ve never done it. (I’ve never built rt in any form or fashion)
Thanks I’ll give it a try.
Where will this go in the process? I’m at the installing tools and libraries stages right now…
-march is a compiler flag.
Can anyone explain in simple terms what I am supposed to do here? It’s not making sense to me.
Are these files supposed to be present/downloaded? They don’t seem to be there based on a couple sample searches I did in that folder. How do I download them? There look to be many thousands of files… Certainly I’m not expected to download each, one at at a time, am I?
If they do have to be downloaded, then it seems to say they have to then be downgraded. Pacman -U? And it says this has to be done for each of these many hundreds of files? I could never keep track of that even if I had days to try it…
Thanks, and how do I use it? Guessing I’ll get to that, if I ever get there… Not looking good for me at the moment… 
I am having a severe migraine at the moment and my father is in ICU, so I am not thinking clearly. I think it ought to be in the makefile using the -DCMAKE_C_FLAGS and / or -DCMAKE_CXX_FLAGS.
Please hang in there and feel better soon!
1 Like
I’ve uploaded the downgrade packages to filebin.
https://filebin.net/z9tlc5g5352dhdlk
Run mingw64.exe and type
pacman -U <path>/mingw-w64-x86_64-lensfun-0.3.2-4-any.pkg.tar.xz
Hit Enter …
pacman -U <path>/mingw-w64-x86_64-libjpeg-turbo-1.5.3-1-any.pkg.tar.xz
Hit Enter …
1 Like
Now I am at this step:
I searched for ‘Makefile’ and this seems like the logical choice from all the files that turned up:
But can’t find ‘iptc’ or ‘docs’ in the file, and can’t find SUBDIRS or DIST_SUBDIRS lists… ???
You’ll find the Makefile in:
... msys64\home\<YourUserName>\libiptcdata-1.0.4\
Use a text editor like Notepad++ to edit the file.
1 Like
Ok so I am at the “Run CMake and Make” steps… Is it somewhere in here where I do this “-march=native”?
It’s done automatically by -DPROC_TARGET_NUMBER="2"
@todd
I see that you made progress in building Rawtherapee. I could not help as it was night time here.
I see that you were confused by some formulation, so if you have some clarifications, please provide them.
@heckflosse
The only difference seems -mcx16 -msahf .
The use of a real architecture seemed to me more logical. I will use msse4
3 Likes
I got to "RawTherapee can now be started from the MINGW64 command line: " and it worked!
From there I stalled at the “Copy RawTherapee and required DLLs” section when I came back and had the luxury of your updated Dev build (haha) and haven’t been back to it yet.
1 Like
Thanks for them!