Default cairo to enabled

* configure.ac (USE_CAIRO): Default cairo to enabled.

* etc/NEWS: Announce the change to use cairo if found.

2 files changed, 10 insertions, 7 deletions

diff --git a/configure.ac b/configure.ac
index f040b748d0a..592d745797c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -430,7 +430,7 @@ OPTION_DEFAULT_ON([png],[don't compile with PNG image support])
 OPTION_DEFAULT_ON([rsvg],[don't compile with SVG image support])
 OPTION_DEFAULT_ON([lcms2],[don't compile with Little CMS support])
 OPTION_DEFAULT_ON([libsystemd],[don't compile with libsystemd support])
-OPTION_DEFAULT_OFF([cairo],[compile with Cairo drawing])
+OPTION_DEFAULT_ON([cairo],[don't compile with Cairo drawing])
 OPTION_DEFAULT_ON([xml2],[don't compile with XML parsing support])
 OPTION_DEFAULT_OFF([imagemagick],[compile with ImageMagick image support])
 OPTION_DEFAULT_ON([json], [don't compile with native JSON support])
@@ -3300,14 +3300,13 @@ if test "${HAVE_X11}" = "yes"; then
     EMACS_CHECK_MODULES(CAIRO, $CAIRO_MODULE)
     if test $HAVE_CAIRO = yes; then
       AC_DEFINE(USE_CAIRO, 1, [Define to 1 if using cairo.])
+      CFLAGS="$CFLAGS $CAIRO_CFLAGS"
+      LIBS="$LIBS $CAIRO_LIBS"
+      AC_SUBST(CAIRO_CFLAGS)
+      AC_SUBST(CAIRO_LIBS)
     else
-      AC_MSG_ERROR([cairo requested but not found.])
+      AC_MSG_WARN([cairo requested but not found.])
     fi
-
-    CFLAGS="$CFLAGS $CAIRO_CFLAGS"
-    LIBS="$LIBS $CAIRO_LIBS"
-    AC_SUBST(CAIRO_CFLAGS)
-    AC_SUBST(CAIRO_LIBS)
   fi
 fi
 
diff --git a/etc/NEWS b/etc/NEWS
index b87202014d2..d5a1d27267a 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -24,6 +24,10 @@ applies, and please also update docstrings as needed.
 
 * Installation Changes in Emacs 28.1
 
+** Cairo is now used by default if found.
+'--with-cairo' is now the default, if the appropriate development files
+are found by 'configure'
+
 
 * Startup Changes in Emacs 28.1