Build from source, get terrible fonts

I built and installed Tcl and Tk 8.6.13 from source. And it works.

Except the fonts. The fonts look awful. Maybe they don't have antialias,
maybe it's something else, I'm not sure. I just know they look awful.
Really awful.

I also have 8.6.6 from my distro's repository and a compact/portable
version of 8.6.13 in FreeWrap, and their fonts look fine. Only my
compiled Tk looks bad.

Then I tried 8.6.14 and had the exact same problem.

Do you people have any idea why? What do you suggest I do to pinpoint
the cause of the problem?

In case you're wondering, I configured it like this:

$ ./configure --disable-symbols --enable-shared --enable-threads --enable-64bit --prefix /opt/tcltk8614 --with-tcl=/home/luc/newtcl/tcl8.6.14/unix

--
Luc

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