OK. Next question: Is there any reason I cannot install libpng version 15 at the sametime?
I am aware that there is a non-versioned link file, that the latest version of the dynamic library installs. That can stay at 16 where it belongs. I mean specifically having both the libpng15 and the libpng16 files. I am very surprised at linking to a specific version of a dynamic library. This is actually commercial software, and it did not link to generic "libpng", nor to generic "libpng15" -- linking to a specific version of a dynamic library? Isn't the whole point of dynamic libraries that you don't get a single specific buggy version, but the latest non-buggy version? On 2020-12-21, at 6:55 PM, Ken Cunningham <[email protected]> wrote: >> On 2020-12-21, at 10:55 AM, Michael <keybounce at gmail.com> wrote: > This >> should be a simple one. I hope. >>> >>> I just installed a program that was compiled against the release version of >>> mac's X11. Crashes on startup with this: >>> >>> dyld: launch, loading dependent libraries >>> >>> Dyld Error Message: >>> Library not loaded: /opt/X11/lib/libpng15.15.dylib >>> >>> What symbolic links do I need? /opt has no X11 directory. >> Ok, another question. I found this: /opt/local/lib/libpng16.16.dylib I >> cannot find the older version. What do I need to do to install both the >> current and the older version of this library at the same time? > > There are likely to be more libraries missing after you fix this one, but you > can try. > > EIther symlink a real library that is the same or as similar as you have into > the position being looked for: > > sudo ln -s /opt/local/lib/libpng16.16.dylib /opt/X11/lib/libpng15.15.dylib > > or > > use install_name_tool to change /opt/local/lib/libpng16.16.dylib to > /opt/X11/lib/libpng15.15.dylib in your binary. > > install_name_tool -change /opt/local/lib/libpng16.16.dylib > /opt/X11/lib/libpng15.15.dylib /path/to/my/binary > > > You can see that there are many many ways this could break / not work at all. > > But it sometimes works, if you’re lucky, and the libraries are very close to > what is being looked for. > > K --- This message was composed with the aid of a laptop cat, and no mouse
