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Comparing rxvt-unicode/README.configure (file contents):
Revision 1.83 by root, Fri May 14 13:47:43 2021 UTC vs.
Revision 1.84 by root, Sat Jul 3 04:04:12 2021 UTC

47 Add support for XIM (X Input Method) protocol. This allows using 47 Add support for XIM (X Input Method) protocol. This allows using
48 alternative input methods (e.g. kinput2) and will also correctly set 48 alternative input methods (e.g. kinput2) and will also correctly set
49 up the input for people using dead keys or compose keys. 49 up the input for people using dead keys or compose keys.
50 50
51 --enable-unicode3 (default: off) 51 --enable-unicode3 (default: off)
52 Recommended to stay off unless you really need non-BMP characters. 52 Recommended to stay off unless you really need a lot of non-BMP
53 characters.
53 54
54 Enable direct support for displaying unicode codepoints above 65535 55 Enable support for direct storage of unicode characters above 65535
55 (the basic multilingual page). This increases storage requirements 56 (the basic multilingual page). This increases storage requirements
56 per character from 2 to 4 bytes. X11 fonts do not yet support these 57 per character from 2 to 4 bytes. X11 fonts do not yet support these
57 extra characters, but Xft does. 58 extra characters, but Xft does.
58 59
59 Please note that rxvt-unicode can store unicode code points >65535 60 Please note that rxvt-unicode can store and display unicode
60 even without this flag, but the number of such characters is limited 61 characters above 65535 even without this flag, but the number of
61 to a few thousand (shared with combining characters, see next 62 such characters is limited to a few thousand (shared with combining
62 switch), and right now rxvt-unicode cannot display them 63 characters, see next switch).
63 (input/output and cut&paste still work, though).
64 64
65 --enable-combining (default: on) 65 --enable-combining (default: on)
66 Enable automatic composition of combining characters into composite 66 Enable automatic composition of combining characters into composite
67 characters. This is required for proper viewing of text where 67 characters. This is required for proper viewing of text where
68 accents are encoded as separate unicode characters. This is done by 68 accents are encoded as separate unicode characters. This is done by
192 rectangular selections 192 rectangular selections
193 trailing space removal for selections 193 trailing space removal for selections
194 verbose X error handling 194 verbose X error handling
195 195
196 --enable-iso14755 (default: on) 196 --enable-iso14755 (default: on)
197 Enable extended ISO 14755 support (see urxvt(1)). Basic support 197 Enable extended ISO 14755 support (see rxvt(1)). Basic support
198 (section 5.1) is enabled by "--enable-frills", while support for 198 (section 5.1) is enabled by "--enable-frills", while support for
199 5.2, 5.3 and 5.4 is enabled with this switch. 199 5.2, 5.3 and 5.4 is enabled with this switch.
200 200
201 --enable-keepscrolling (default: on) 201 --enable-keepscrolling (default: on)
202 Add support for continual scrolling of the display when you hold the 202 Add support for continual scrolling of the display when you hold the
224 224
225 --enable-pointer-blank (default: on) 225 --enable-pointer-blank (default: on)
226 Add support to have the pointer disappear when typing or inactive. 226 Add support to have the pointer disappear when typing or inactive.
227 227
228 --enable-perl (default: on) 228 --enable-perl (default: on)
229 Enable an embedded perl interpreter. See the urxvtperl(3) manpage 229 Enable an embedded perl interpreter. See the rxvtperl(3) manpage for
230 for more info on this feature, or the files in src/perl/ for the 230 more info on this feature, or the files in src/perl/ for the
231 extensions that are installed by default. The perl interpreter that 231 extensions that are installed by default. The perl interpreter that
232 is used can be specified via the "PERL" environment variable when 232 is used can be specified via the "PERL" environment variable when
233 running configure. Even when compiled in, perl will *not* be 233 running configure. Even when compiled in, perl will *not* be
234 initialised when all extensions have been disabled "-pe "" 234 initialised when all extensions have been disabled "-pe ""
235 --perl-ext-common """, so it should be safe to enable from a 235 --perl-ext-common """, so it should be safe to enable from a
247 This switch breaks termcap/terminfo compatibility to 247 This switch breaks termcap/terminfo compatibility to
248 "TERM=rxvt-unicode", and consequently sets "TERM" to 248 "TERM=rxvt-unicode", and consequently sets "TERM" to
249 "rxvt-unicode-256color" by default (doc/etc/ contains 249 "rxvt-unicode-256color" by default (doc/etc/ contains
250 termcap/terminfo definitions for both). 250 termcap/terminfo definitions for both).
251 251
252 It also results in higher memory usage and can slow down urxvt 252 It also results in higher memory usage and can slow down rxvt
253 dramatically when more than six fonts are in use by a terminal 253 dramatically when more than six fonts are in use by a terminal
254 instance. 254 instance.
255 255
256 --with-name=NAME (default: urxvt) 256 --with-name=NAME (default: urxvt)
257 Set the basename for the installed binaries, resulting in "urxvt", 257 Set the basename for the installed binaries, resulting in "urxvt",

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