What else do I need to add to the compile line to use the gmp unit? I added gmp to the use line and it throws an error in compilation:

ld: warning: -multiply_defined is obsolete
-macosx_version_min has been renamed to -macos_version_min ld: warning: ignoring duplicate libraries: '-lc'
ld: library 'gmp.3' not found
—

First two lines are always there. Last two occur when I add gmp to the use line. Seems to be looking for libgmp.3.dylib (or libgmp.3.a?). Is unfortunate that it includes a version number, since the gmplib installed with homebrew provides:

/opt/homebrew/lib/libgmp.10.dylib
/opt/homebrew/lib/libgmp.a
/opt/homebrew/lib/libgmp.dylib

Is there a workaround or is the gmp unit unusable with newer versions of gmplib?

Appreciate any advice.

Regards
Pete

looks like the $linklib directive is using a wrong version number.

Just copy the sources to your project, change the version number and you should be all set.

Of course, if the library changed a lot - 7 versions is a lot, it may well be that the definitions in the unit are no longer correct.

Michael.

I did copy gmp.pas to another folder and named it mygmp.pas, changed "$linklib gmp.3” to "$linklib gmp.dylib” (just plain gmp did not work). Now examples compile and run with the change to “uses mygmp” and adding opt/homebrew/lib to the link search path.

So good to go.

For next release can we change the gmp.pas source to:
{$ifdef darwin}
  {$linklib gmp.dylib}
{$endif}

That way folks can use the installed unit w/o changes (except to their lib path).

Thanks!

Done.

Michael.