Build Failure on ports-10.13_x86_64

[buildbot at macports.org]

Status:       Failure
Build slave:  ports-10.13_x86_64
Full logs:    https://build.macports.org/builders/ports-10.13_x86_64-watcher/builds/6518
Build reason: The SingleBranchScheduler scheduler named 'ports' triggered this build
Port list:    gnss-sdr volk-gnss-sdr
Subport list:
	- gnss-sdr-devel
	- volk-gnss-sdr-next
	- gnss-sdr-next
Variants:     None
Revision:     d21cad644a40f36c52802c6753fe513baeeeda0f
Build time:   0:38:13
Author:       Michael Dickens <michaelld at macports.org>

Log from failed builds:

Links to individual build jobs:
- ports-10.13_x86_64-builder #27805
  https://build.macports.org/builders/ports-10.13_x86_64-builder/builds/27805
- ports-10.13_x86_64-builder #27806
  https://build.macports.org/builders/ports-10.13_x86_64-builder/builds/27806
- ports-10.13_x86_64-builder #27807
  https://build.macports.org/builders/ports-10.13_x86_64-builder/builds/27807

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