After make distclean and restarting the computer I updated config/
qt4.m4 with the PKG_CONFIG patch.
Without declaring LDFLAGS
./configure --prefix=/path/to/LyX.app --with-version-suffix=-1.5 --
without-x --with-frontend=qt4 --with-qt4-dir=/path/to/QT4 --with-
included-gettext --enable-optimization=-Os --disable-stdlib-debug --
disable-concept-checks --enable-debug --enable-assertions
configure completed without errors
make failed with many undefined symbols so it looks like the LDFLAGS
declaration is still needed for the frameworks etc.
Roger