The pcre-jitstack test case fails on Mac OS X due to the system base64 expecting either '-D or --decode' rather than '-d or --decode'. The trivial fix is to use the common '--decode' option rather than '-d'...
diff -uNr grep-2.25/tests/pcre-jitstack grep-2.25-patched/tests/pcre-jitstack --- grep-2.25/tests/pcre-jitstack 2016-01-01 17:45:41.000000000 -0500 +++ grep-2.25-patched/tests/pcre-jitstack 2016-08-16 10:53:58.000000000 -0400 @@ -17,7 +17,7 @@ fail=0 -base64 -d >pcrejit.txt.gz <<'EOF' +base64 --decode >pcrejit.txt.gz <<'EOF' H4sIAAAAAAACA+2bUU4DMQxE/7mMz5T7XwKE+IBKVLue58yk0B9EtX6xJxN7t4VaH69a6+tHrW+/ r4e3n75KARWShSOFTtiumE3FPVyo79ATIJ0Ry0No/yXe99UIUqTGKKUzYHFJHJoaCONQDCnDSCDS IPAvGCVeXNsZ7lpbWFfdaZtgPos5LeK2C1TBKzD09V3HFlCOsbFT/hNbz4HzJaRjnjdam9FXw/o6
