Well, at this point I'm relieved to find out that the old way without
-no-iconv really was broken. The test 'tests/auto/qtextcodec' fails
spectacularly:
[...]
FAIL! : tst_QTextCodec::toUnicode(korean-eucKR) 'c != 0' returned FALSE. ()
../tst_qtextcodec.cpp(131) : failure location
FAIL! : tst_QTextCodec::fromUnicode(data32) 'codec != 0' returned FALSE. ()
../tst_qtextcodec.cpp(262) : failure location
FAIL! : tst_QTextCodec::fromUnicode(data33) 'codec != 0' returned FALSE. ()
../tst_qtextcodec.cpp(262) : failure location
[...]