A macOS static linking mystery

[Carter Schonwald]

ahh, pkgconfig is what i was overlooking!

agreed with viktor, using the system provided one is definitely safer

On Mon, Aug 8, 2022 at 10:46 AM Viktor Dukhovni <ietf-dane at dukhovni.org>
wrote:

> On Mon, Aug 08, 2022 at 09:59:48AM -0400, Viktor Dukhovni wrote:
>
> > On my MacOS laptop I get:
> >
> >     $ /usr/local/bin/pkg-config --libs libffi
> >     -lffi
> >
> > which does not use the "brew"-installed libffi.  Not surprising, since
> > /usr/local/lib/pkgconfig/ has no symlink to the "libffi.pc" file.
>
> When updating "libffi" HomeBrew reports:
>
>     ==> libffi
>     libffi is keg-only, which means it was not symlinked into /usr/local,
>     because macOS already provides this software and installing another
> version in
>     parallel can cause all kinds of trouble.
>
>     For compilers to find libffi you may need to set:
>       export LDFLAGS="-L/usr/local/opt/libffi/lib"
>       export CPPFLAGS="-I/usr/local/opt/libffi/include"
>
> If the MacOS libffi works, it is probably safer to use it rather than
> the HomeBrew version.
>
> --
>     Viktor.
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