Inconsistent naming of Qt components in .pc files and of .pc files breaks autoconf

In the Qt 5.0.1 directory ~/Qt5.0.1/5.0.1/clang_64/lib/pkgconfig, as set up by the 5.0.1 installer for OS X, most files have Qt5Core but not QtCore in the Requires: line, but 4 files - QtWebKit.pc, QtWebKitWidgets.pc, QtWebKitWidgets_debug.pc, and QtWebKit_debug.pc - have both QtCore and Qt5Core in the Requires: line.

There is no Qt5Core.pc file; there is a QtCore.pc file that has "Name: Qt5Core" in it.

The command

pkg-config --cflags "QtGui"

fails with

Package Qt5Core was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Core.pc'
to the PKG_CONFIG_PATH environment variable
Package 'Qt5Core', required by 'Qt5Gui', not found

If I fix that by symlinking Qt5Core.pc to QtCore.pc,

pkg-config --cflags "QtWidgets"

fails with

Package Qt5Gui was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Gui.pc'
to the PKG_CONFIG_PATH environment variable
Package 'Qt5Gui', required by 'Qt5Widgets', not found

and if I fix that by symlinking Qt5Gui.pc to QtGuipc,

pkg-config --cflags "QtPrintSupport"

fails with

Package Qt5Widgets was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Widgets.pc'
to the PKG_CONFIG_PATH environment variable
Package 'Qt5Widgets', required by 'Qt5PrintSupport', not found

which is fixed by symlinking Qt5Widgets.pc to QtWidgets.pc.

I'm not sure what the right fix is - rename all the QtWhatever.pc to Qt5Whatever.pc? Use QtWhatever rather than Qt5Whatever in the Requires: and Name: lines?