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Warn about XFT and about Cairo without HarfBuzz

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* configure.ac: Warn about libXFT usage.  Warn about using Cairo
without HarfBuzz.

* etc/NEWS: Announce XFT and HarfBuzz warnings.
This commit is contained in:
Robert Pluim 2020-01-24 10:37:59 +01:00
parent 75c1f936fc
commit 1ebe160577
2 changed files with 27 additions and 0 deletions
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14
configure.ac
View file

@ -5891,6 +5891,20 @@ you can continue to support by using '$0 --with-pop'.])
esac
fi
if test "${HAVE_XFT}" = yes; then
AC_MSG_WARN([This configuration uses libXft,
which has a number of font rendering issues, and is being considered for
removal in the next release of Emacs. Please consider using Cairo + HarfBuzz
instead (they are auto-detected if the relevant development headers are
installed).])
fi
if test "${HAVE_CAIRO}" = "yes" && test "${HAVE_HARFBUZZ}" = no; then
AC_MSG_WARN([This configuration uses Cairo, but not HarfBuzz. We
recommend the use of HarfBuzz when using Cairo, please install
HarfBuzz development packages.])
fi
# Let plain 'make' work.
test "$MAKE" = make || test -f makefile || cat >makefile <<EOF
.POSIX:

13
etc/NEWS
View file

@ -41,6 +41,19 @@ available when HarfBuzz is supported, but will not be used by default.
We strongly recommend building with HarBuzz support. 'x' is still a
valid backend.
---
** 'configure' now warns about building with libXft support.
libXft is unmaintained, and causes a number of problems with modern
fonts including but not limited to crashes; support for it may be
removed in a future version of Emacs. Please consider using
Cairo + HarfBuzz instead.
---
** 'configure' now warns about not using HarfBuzz if using Cairo.
We want to encourage people to use the most modern font features
available, and this is Cairo + HarfBuzz, so 'configure' now recommends
that combination.
---
** The ftx font backend driver has been removed.
It was declared obsolete in Emacs 27.1.