2.3 distcheck fails

[Pavel Sanda]

Hi,


distcheck currently fails on my setup (automake 1.16.3, gcc 10.2, Qt 5.15):

make[2]: Entering directory '/tmp/g-free-2.3/lyx-2.3.7dev/_build/sub'
test -z "lyx.1" || rm -f lyx.1
rm -f config.h stamp-h1
rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
test . = "../.." || test -z "" || rm -f 
rm -f cscope.out cscope.in.out cscope.po.out cscope.files
test -z "*.orig *.rej *~ *.bak core" || rm -f *.orig *.rej *~ *.bak core
make[2]: Leaving directory '/tmp/g-free-2.3/lyx-2.3.7dev/_build/sub'
rm -f config.status config.cache config.log configure.lineno config.status.lineno
rm -f Makefile
ERROR: files left in build directory after distclean:
./src/tests/.deps/boost.Po
./src/tests/.deps/dummy_functions.Po
make[1]: *** [Makefile:867: distcleancheck] Error 1
make[1]: Leaving directory '/tmp/g-free-2.3/lyx-2.3.7dev/_build/sub'
make: *** [Makefile:796: distcheck] Error 1

Few observations -
1) master distcheck works
2) 2.3.x distcheck works on archaic system with qt4 & gcc 4.9 & automake 1.14
3) the commit 86ae7dad3fc seems related, but it's in both master nad branch

Any clue?
Pavel