Don't link libXft when using cairo

* configure.ac: Check cairo early.  Don't try Xft if cairo is used.
* lwlib/lwlib-utils.h [USE_CAIRO]: Include cairo.h and fontconfig.h.
(XftFont, XftDraw, XftColor, XGlyphInfo) [USE_CAIRO]: New typedefs.
(XftFontOpenName, XftFontClose, XftDrawCreate, XftDrawDestroy)
(XftDrawRect, XftDrawStringUtf8, XftTextExtentsUtf8) [USE_CAIRO]: New macros.
(crxft_font_open_name, crxft_font_close, crxft_draw_create)
(crxft_draw_rect, crxft_draw_string, crxft_text_extents) [USE_CAIRO]: New
externs.
* lwlib/lwlib-utils.c [USE_CAIRO]: Include math.h, cairo-ft.h, and
cairo-xlib.h.
(crxft_font_open_name, crxft_font_close, crxft_draw_create)
(crxft_set_source_color, crxft_draw_rect, crxft_draw_string)
(crxft_text_extents) [USE_CAIRO]: New Xft compatibility functions.
* lwlib/xlwmenuP.h [USE_CAIRO]: Include lwlib-utils.h.
* lwlib/xlwmenu.c (display_menu_item) [USE_CAIRO]: Call
cairo_surface_mark_dirty and cairo_surface_flush.
* lwlib/lwlib-Xaw.c [USE_CAIRO]: Include stdlib.h and lwlib-utils.h.
(draw_text) [USE_CAIRO]: Call cairo_surface_flush.
* src/xsettings.c [USE_CAIRO]: Include fontconfig.h
(apply_xft_settings) [!HAVE_XFT]: Don't call XftDefaultSubstitute or
XftDefaultSet.
* lwlib/lwlib-Xaw.c:
* lwlib/lwlib-int.h:
* lwlib/xlwmenu.c:
* lwlib/xlwmenuP.h:
* src/xrdb.c:
* src/xsettings.c:
* src/xterm.c: Replace all #ifdef HAVE_XFT with #if defined USE_CAIRO ||
defined HAVE_XFT.
* src/xfns.c (x_default_font_parameter): Replace #ifdef HAVE_XFT with #if
defined	USE_CAIRO || defined HAVE_XFT.

1 files changed, 33 insertions, 19 deletions

diff --git a/configure.ac b/configure.ac
index 8b363c7fca6..810c3219e4f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3312,12 +3312,44 @@ if test "${HAVE_X11}" = "yes"; then
   fi
 fi
 
+HAVE_CAIRO=no
+if test "${HAVE_X11}" = "yes"; then
+  if test "${with_cairo}" != "no"; then
+    CAIRO_REQUIRED=1.12.0
+    CAIRO_MODULE="cairo >= $CAIRO_REQUIRED"
+    EMACS_CHECK_MODULES(CAIRO, $CAIRO_MODULE)
+    if test $HAVE_CAIRO = yes; then
+      AC_DEFINE(USE_CAIRO, 1, [Define to 1 if using cairo.])
+    else
+      AC_MSG_ERROR([cairo requested but not found.])
+    fi
+
+    CFLAGS="$CFLAGS $CAIRO_CFLAGS"
+    LIBS="$LIBS $CAIRO_LIBS"
+    AC_SUBST(CAIRO_CFLAGS)
+    AC_SUBST(CAIRO_LIBS)
+  fi
+fi
+
 ### Start of font-backend (under any platform) section.
 # (nothing here yet -- this is a placeholder)
 ### End of font-backend (under any platform) section.
 
 ### Start of font-backend (under X11) section.
 if test "${HAVE_X11}" = "yes"; then
+  if test $HAVE_CAIRO = yes; then
+    dnl Strict linkers fail with
+    dnl ftfont.o: undefined reference to symbol 'FT_New_Face'
+    dnl if -lfreetype is not specified.
+    dnl The following is needed to set FREETYPE_LIBS.
+    EMACS_CHECK_MODULES([FREETYPE], [freetype2])
+
+    test "$HAVE_FREETYPE" = "no" && AC_MSG_ERROR(cairo requires libfreetype)
+
+    EMACS_CHECK_MODULES([FONTCONFIG], [fontconfig >= 2.2.0])
+
+    test "$HAVE_FONTCONFIG" = "no" && AC_MSG_ERROR(cairo requires libfontconfig)
+  else
     ## Use -lXft if available, unless '--with-xft=no'.
     HAVE_XFT=maybe
     if test "x${with_x}" = "xno"; then
@@ -3374,6 +3406,7 @@ if test "${HAVE_X11}" = "yes"; then
 
        test "$HAVE_FREETYPE" = "no" && AC_MSG_ERROR(libxft requires libfreetype)
     fi
+  fi				  # $HAVE_CAIRO != yes
 
     HAVE_LIBOTF=no
     if test "${HAVE_FREETYPE}" = "yes"; then
@@ -3427,25 +3460,6 @@ AC_SUBST(LIBOTF_LIBS)
 AC_SUBST(M17N_FLT_CFLAGS)
 AC_SUBST(M17N_FLT_LIBS)
 
-HAVE_CAIRO=no
-if test "${HAVE_X11}" = "yes"; then
-  if test "${with_cairo}" != "no"; then
-    CAIRO_REQUIRED=1.12.0
-    CAIRO_MODULE="cairo >= $CAIRO_REQUIRED"
-    EMACS_CHECK_MODULES(CAIRO, $CAIRO_MODULE)
-    if test $HAVE_CAIRO = yes; then
-      AC_DEFINE(USE_CAIRO, 1, [Define to 1 if using cairo.])
-    else
-      AC_MSG_ERROR([cairo requested but not found.])
-    fi
-
-    CFLAGS="$CFLAGS $CAIRO_CFLAGS"
-    LIBS="$LIBS $CAIRO_LIBS"
-    AC_SUBST(CAIRO_CFLAGS)
-    AC_SUBST(CAIRO_LIBS)
-  fi
-fi
-
 if test "${HAVE_X11}" = "yes"; then
   AC_CHECK_HEADER(X11/Xlib-xcb.h,
     AC_CHECK_LIB(xcb, xcb_translate_coordinates, HAVE_XCB=yes))