[MacPorts] #67035: gr-osmosdr fail to build with +iio in macOS 10.15.7

[MacPorts]

#67035: gr-osmosdr fail to build with +iio in macOS 10.15.7
-------------------------+-----------------------
  Reporter:  YesNo801    |      Owner:  michaelld
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  gr-osmosdr  |
-------------------------+-----------------------
Changes (by ryandesign):

 * owner:  (none) => michaelld
 * status:  new => assigned
 * keywords:  gr-osmosdr =>


Old description:

> command to install and build:
>
> $ sudo port install gr-osmosdr +iio
>
> ...
>
> Fetching archive for gr-iio
> ...
> --->  Fetching distfiles for gr-osmosdr
> --->  Verifying checksums for gr-osmosdr
> --->  Extracting gr-osmosdr
> --->  Applying patches to gr-osmosdr
> --->  Configuring gr-osmosdr
>
> Error: Failed to configure gr-osmosdr: consult Error: Processing of port
> gr-osmosdr failed

New description:

 command to install and build:

 {{{
 $ sudo port install gr-osmosdr +iio

 ...

 Fetching archive for gr-iio
 ...
 --->  Fetching distfiles for gr-osmosdr
 --->  Verifying checksums for gr-osmosdr
 --->  Extracting gr-osmosdr
 --->  Applying patches to gr-osmosdr
 --->  Configuring gr-osmosdr

 Error: Failed to configure gr-osmosdr: consult Error: Processing of port
 gr-osmosdr failed
 }}}

--

Comment:

 The relevant error from the main.log might be:

 {{{
 CMake Error at lib/plutosdr/CMakeLists.txt:30 (target_link_libraries):
   Attempt to add link library "/opt/local/lib/libgnuradio-iio.dylib" to
   target "gnuradio-osmosdr" which is not built in this directory.
   This is allowed only when policy CMP0079 is set to NEW.
 }}}

 Though I also see this which looks a little weird since the port does
 declare a dependency on gmp (and mpir):

 {{{
 -- Checking for module 'gmp'
 --   Found gmp, version 6.2.1
 -- Could NOT find GMP (missing: GMPXX_LIBRARY GMP_LIBRARY GMP_INCLUDE_DIR)
 -- GMP not found; this is not a problem if MPIR can be found.
 -- Checking for module 'mpir >= 3.0'
 --   No package 'mpir' found
 -- Found MPIR: /opt/local/lib/libmpirxx.dylib
 -- MPIR found
 -- Found MPLIB: /opt/local/lib/libmpirxx.dylib
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/67035#comment:1>
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