getting some errors with 10.99 master(windows), last time it was fine to compile(2 weeks ago..)

./configure: line 16350: PKG_PROG_PKG_CONFIG: command not found

./configure: line 21247: syntax error near unexpected token `QTPLATFORM,'
./configure: line 21247: `        PKG_CHECK_MODULES(QTPLATFORM, Qt5PlatformSuppo
rt, QT_LIBS="$QTPLATFORM_LIBS $QT_LIBS")'

solution, roll back: 
Remove custom pkg.m4 script.
master    (#5688)