* font.c [HAVE_M17N_FLT]: Include <m17n-flt.h>.
(font_charset_alist): Moved from xfont.c and renamed. (font_registry_charsets): Likewise. (font_prop_validate_otf): New function. (font_property_table): Register it for QCotf. (DEVICE_DELTA, adjust_anchor, REPLACEMENT_CHARACTER) (font_drive_otf): Deleted. (font_prepare_composition): New arg F. Adjusted for the change of lispy gstring. (font_find_for_lface): New arg C. (font_load_for_face): Adjusted for the change of font_find_for_lface. (Ffont_make_gstring): Adjusted for the change of lispy gstring. (Ffont_fill_gstring): Likewise. (Ffont_shape_text): New function. (Fopen_font): If the font size is not given, use 12-pixel. (Ffont_at): New arg STRING. (syms_of_font): Initalize font_charset_alist. Declare Ffont_shape_text as a Lisp function. Call syms_of_XXfont conditionally.
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