Build Failure on ports-10.12_x86_64

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.12_x86_64
Full logs:    https://build.macports.org/builders/ports-10.12_x86_64-watcher/builds/19285
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    gnss-sdr volk-gnss-sdr
Subport list:
	- gnss-sdr-devel
	- gnss-sdr-next
Variants:     None
Revision:     2fca05924a0f4dad23a54bdd5c8651fc32ae0cae
Build time:   0:39:14
Author:       Michael Dickens <michaelld at macports.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.12_x86_64-builder #78725
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/78725
- ports-10.12_x86_64-builder #78726
  https://build.macports.org/builders/ports-10.12_x86_64-builder/builds/78726

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MacPorts Buildbot
https://build.macports.org/