I downloaded the official Qt 5.4.2 installer, and installed it to /opt/Qt5.4.2
Code:
cmake -G "Unix Makefiles" \
-DINSTALL_BUNDLED_DICTS=0 \
-DCMAKE_INSTALL_PREFIX=./usr \
-DCMAKE_C_FLAGS:STRING="${CFLAGS}" \
-DCMAKE_CXX_FLAGS:STRING="${CXXFLAGS}" \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_PREFIX_PATH=/opt/Qt5.4.2/5.4/gcc/lib/cmake \
..
make
make install
./usr/bin/sigil
...
The meta editor still has the same dysfunctional look.
This appeared sometime since June 15, 2015 which was the
ALA arch-chroot I initially used to test Qt 5.4.2