Fix up macos library build

5 jobs for master in 2 minutes and 3 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #1809
docker linux
build:linux64

00:02:01

failed #1808
mac
build:mac64

00:01:02

passed #1806
windows autobuild
build:windows

00:00:21

passed #1807
windows autobuild
build:windows64

00:00:21

 
  Deploy
skipped #1810
windows autobuild allowed to fail manual
upload
 
Name Stage Failure
failed
build:mac64 Build
3 errors generated.
make[3]: *** [synthesis.lo] Error 1
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
ERROR: building configuration {'default': 'true', 'configure': None, 'name': 'default', 'build': {'command': None, 'options': [], 'filters': None, 'arguments': None}} returned 2
For more information: try re-running your command with --verbose or --debug
Cleaning up file based variables
ERROR: Job failed: exit status 1