[MacPorts] #56937: Gperf 3.1 Build Error with Mojave

[MacPorts]

#56937: Gperf 3.1 Build Error with Mojave
------------------------+--------------------
 Reporter:  iamjstates  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.5.3
 Keywords:              |       Port:
------------------------+--------------------
 This is the print out from the logs. I will attach the whole main.log

 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./version.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./positions.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./options.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./keyword.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./keyword-list.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./input.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./bool-array.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./hash-table.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./search.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./output.cc
 :info:build /usr/bin/clang++ -pipe -Os -stdlib=libc++ -arch x86_64
 -I/usr/local/ports/include -I. -I./../lib -c ./main.cc
 :info:build ./output.cc:327:11: warning: format string is empty [-Wformat-
 zero-length]
 :info:build           "",
 :info:build           ^~
 :info:build ./output.cc:380:11: warning: format string is empty [-Wformat-
 zero-length]
 :info:build           "",
 :info:build           ^~
 :info:build ./output.cc:441:11: warning: format string is empty [-Wformat-
 zero-length]
 :info:build           "",
 :info:build           ^~
 :info:build ./output.cc:842:11: warning: format string is empty [-Wformat-
 zero-length]
 :info:build           "",
 :info:build           ^~
 :info:build ./output.cc:1998:11: warning: format string is empty
 [-Wformat-zero-length]
 :info:build           "",
 :info:build           ^~
 :info:build 5 warnings generated.

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Ticket URL: <https://trac.macports.org/ticket/56937>
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