@Dominus - One more question. Does SDL-1.2 still need this patch (downloaded in my old script this way):

curl -o CoreAudio-SDL-1.2.diff -L https://bugzilla-attachments.libsdl.org/attac … ent.cgi?id=2272

I don't know anymore 😉
I don't apply it anymore, so probably not.

Dominus, one more question, and apologies for bothering you about this.

I'm making real progress on my script, and want to add one interactive help for the user. For autoconf, automakers, and lib tool, I can use this bit of script to tell the user that the executable is already installed:

1if command -v autoconf > /dev/null 2>&1; then
2  echo "Autoconf is installed. You may reinstall if you want."
3else
4  echo "Autoconf is not installed."
5fi

Is there an equivalent that I can use to check if zlib, libpng, etc., are already installed?

Use
pkg-config --libs zlib
It's a crude way since it only reads the zlib.pc file in lib/pkgconfig but it's some way at least. Maybe pkg-config has something more in its command options.

Something else: Yesterday I found that Dosbox with output=opengl does not look good when compiled against SDK 10.15/11.x and run in Big Sur. Can you confirm this?
(It's only taking a portion of the dosbox window)

Thank you for that pkg-config test.

Yes, in an earlier post in this thread I reported the problem with the tiny text in the lower left of the window with OpenGL. I fixed it by using output=surface, but obviously that's not a real solution...!

Grrr, sorry missed that. The only "solution" I found is using the SDK 10.14 🙁
I suspect that's another problem caused by Apple in the SDL 1.2x backend ;(

That's unfortunate - I'm trying to avoid requiring the 10.14 SDK in my script...

I'm trying to find out what's wrong, filing a bug with SDL. Hopefully this can be fixed soon. In the meantime, SDK 10.14 is the way to go unfortunately. Everything other than opengl is very slow on macOS 🙁

OK, my current headache is getting pkgconfig installed via a script. I've got it installed on another Big Sur system, but possibly because it inherited it from Catalina or Mojave...

Hmm, what's the problem?

As for the SDK/OpenGl problem, with SDL's test program (testgl) I get the same issue. So it's either a SDL or a general issue on Big Sur (but likely SDL as there have not been other apps that reported something like that).
I'm getting screenshots ready now and will make a bug report at SDL

Got the pkgconfig problem solved; I don't know what I got wrong earlier.

One other thing about my script: I can't use /opt etc. on my system because it needs sudo to access it, so I've done what I did in my old script, which is create a $HOME/Development folder and install into that. So far, it works....

I'll keep working on my script, but won't go public until there's a fix for OpenGL under Big Sur. If I have to end up installing the 10.14 SDK somewhere, I will, but I'll hope it won't be needed.

EDIT: I remember a similar SDL problem with DOSBox-X...

More on this:

I suppose it's possible for the script to download

https://github.com/phracker/MacOSX-SDKs/relea … 0.14.sdk.tar.xz

and then expand it to the build environment, but it would of course be better if upstream fixed the problem...

hmm, I'll see if I can get dosbox-x to chime in in the SDL bug report https://github.com/libsdl-org/SDL-1.2/issues/839

emendelson wrote on 2021-03-10, 15:24:

EDIT: I remember a similar SDL problem with DOSBox-X...

you were right! See the issue https://github.com/libsdl-org/SDL-1.2/issues/839 again, with a patch based on two commits by JC.

Excellent! Can that patch be put into SVN??

it's a patch for SDL, they need to put it in the SDL 1.2 git 😀

Ah - so a DOSBox build script would need to apply the patch...?

Yes, but it might get soon applied to the sdl github, I might have caught the right person's attention 😉

OK, great. I'll keep working on the script in the meantime.

OK, here's a scripting question. To test whether autoconf, etc., are available, I use this:

1if command -v pkg-config > /dev/null 2>&1; then
2  echo "pkgconfig is available to this script. You may reinstall if you want."
3else
4  echo "pkgconfig is not available to this script."
5fi

But I can't figure out what to write that will make the script report cleanly whether a library is available. This does NOT work:

1if pkg-config --libs zlib | grep -q 'was not found' > /dev/null 2>&1; then
2	echo "zlib is not available to this script."
3else 
4	echo "zlib is avaiable to this script. You may reinstall if you want."
5fi

It always reports that "zlib is available" - even if the script tests for something like "nothing" instead of "zlib". What is the secret to getting this right???