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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: SDL Ada package fails to compile on Mac, gnat 13.1, missing "SDL2_ttf/SDL_ttf.h"
Date: Thu, 29 Jun 2023 12:33:44 +0100
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Kenneth Wolcott <kennethwolcott@gmail.com> writes:

> I heavily use MacPorts.  I keep hearing that it is a very bad idea to
> have MacPorts and HomeBrew concurrently installed on the same machine.
> Is it at all possible to do this without HomeBrew? Apparently I did
> not read your documentation carefully enough...I thought that having
> SDL installed via HomeBrew was optional, not required.

It's quite tricky to get the C includes and library directories working;
using Homebrew doesn't make it any easier, and the fact that the Mac
compilers (both the ones I've provided and the ones you get via Alire)
don't look in /usr/local by default doesn't help.

Having the external SDL2/SDL2_images/SDL22_ttf installed via Homebrew
isn't mandatory, but they do have to be installed! I expect that
MacPorts can do this.

With HomeBrew, installed packages are(almost always) under
$HOMEBREW_PREFIX, and I've defined these environment variables globally:

   export C_INCLUDE_PATH=$HOMEBREW_PREFIX/include
   export LIBRARY_PATH=$HOMEBREW_PREFIX/lib

I'd be surprised if MacPorts doesn't do similar
(e.g. MACPORTS_PREFIX=/opt/local ??).