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1 Basic Installation
2 ==================
3
4 These are installation instructions for Readline-8.2.
5
6 The simplest way to compile readline is:
7
8 1. `cd' to the directory containing the readline source code and type
9 `./configure' to configure readline for your system. If you're
10 using `csh' on an old version of System V, you might need to type
11 `sh ./configure' instead to prevent `csh' from trying to execute
12 `configure' itself.
13
14 Running `configure' takes some time. While running, it prints some
15 messages telling which features it is checking for.
16
17 2. Type `make' to compile readline and build the static readline
18 and history libraries. If supported, the shared readline and history
19 libraries will be built also. See below for instructions on compiling
20 the other parts of the distribution. Typing `make everything' will
21 cause the static and shared libraries (if supported) and the example
22 programs to be built.
23
24 3. Type `make install' to install the static readline and history
25 libraries, the readline include files, the documentation, and, if
26 supported, the shared readline and history libraries.
27
28 4. You can remove the created libraries and object files from the
29 build directory by typing `make clean'. To also remove the
30 files that `configure' created (so you can compile readline for
31 a different kind of computer), type `make distclean'. There is
32 also a `make maintainer-clean' target, but that is intended mainly
33 for the readline developers, and should be used with care.
34
35 The `configure' shell script attempts to guess correct values for
36 various system-dependent variables used during compilation. It
37 uses those values to create a `Makefile' in the build directory,
38 and Makefiles in the `doc', `shlib', and `examples'
39 subdirectories. It also creates a `config.h' file containing
40 system-dependent definitions. Finally, it creates a shell script
41 `config.status' that you can run in the future to recreate the
42 current configuration, a file `config.cache' that saves the
43 results of its tests to speed up reconfiguring, and a file
44 `config.log' containing compiler output (useful mainly for
45 debugging `configure').
46
47 If you need to do unusual things to compile readline, please try
48 to figure out how `configure' could check whether to do them, and
49 mail diffs or instructions to <bug-readline@gnu.org> so they can
50 be considered for the next release. If at some point
51 `config.cache' contains results you don't want to keep, you may
52 remove or edit it.
53
54 The file `configure.in' is used to create `configure' by a
55 program called `autoconf'. You only need `configure.in' if you
56 want to change it or regenerate `configure' using a newer version
57 of `autoconf'. The readline `configure.in' requires autoconf
58 version 2.69 or newer.
59
60 Compilers and Options
61 =====================
62
63 Some systems require unusual options for compilation or linking that
64 the `configure' script does not know about. You can give `configure'
65 initial values for variables by setting them in the environment. Using
66 a Bourne-compatible shell, you can do that on the command line like
67 this:
68
69 CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure
70
71 Or on systems that have the `env' program, you can do it like this:
72
73 env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure
74
75 Compiling For Multiple Architectures
76 ====================================
77
78 You can compile readline for more than one kind of computer at the
79 same time, by placing the object files for each architecture in their
80 own directory. To do this, you must use a version of `make' that
81 supports the `VPATH' variable, such as GNU `make'. `cd' to the
82 directory where you want the object files and executables to go and run
83 the `configure' script. `configure' automatically checks for the
84 source code in the directory that `configure' is in and in `..'.
85
86 If you have to use a `make' that does not supports the `VPATH'
87 variable, you have to compile readline for one architecture at a
88 time in the source code directory. After you have installed
89 readline for one architecture, use `make distclean' before
90 reconfiguring for another architecture.
91
92 Installation Names
93 ==================
94
95 By default, `make install' will install the readline libraries in
96 `/usr/local/lib', the include files in
97 `/usr/local/include/readline', the man pages in `/usr/local/man',
98 and the info files in `/usr/local/info'. You can specify an
99 installation prefix other than `/usr/local' by giving `configure'
100 the option `--prefix=PATH' or by supplying a value for the
101 DESTDIR variable when running `make install'.
102
103 You can specify separate installation prefixes for
104 architecture-specific files and architecture-independent files.
105 If you give `configure' the option `--exec-prefix=PATH', the
106 readline Makefiles will use PATH as the prefix for installing the
107 libraries. Documentation and other data files will still use the
108 regular prefix.
109
110 Specifying the System Type
111 ==========================
112
113 There may be some features `configure' can not figure out
114 automatically, but need to determine by the type of host readline
115 will run on. Usually `configure' can figure that out, but if it
116 prints a message saying it can not guess the host type, give it
117 the `--host=TYPE' option. TYPE can either be a short name for
118 the system type, such as `sun4', or a canonical name with three
119 fields: CPU-COMPANY-SYSTEM (e.g., i386-unknown-freebsd4.2).
120
121 See the file `config.sub' for the possible values of each field.
122
123 Sharing Defaults
124 ================
125
126 If you want to set default values for `configure' scripts to share,
127 you can create a site shell script called `config.site' that gives
128 default values for variables like `CC', `cache_file', and `prefix'.
129 `configure' looks for `PREFIX/share/config.site' if it exists, then
130 `PREFIX/etc/config.site' if it exists. Or, you can set the
131 `CONFIG_SITE' environment variable to the location of the site script.
132 A warning: the readline `configure' looks for a site script, but not
133 all `configure' scripts do.
134
135 Operation Controls
136 ==================
137
138 `configure' recognizes the following options to control how it
139 operates.
140
141 `--cache-file=FILE'
142 Use and save the results of the tests in FILE instead of
143 `./config.cache'. Set FILE to `/dev/null' to disable caching, for
144 debugging `configure'.
145
146 `--help'
147 Print a summary of the options to `configure', and exit.
148
149 `--quiet'
150 `--silent'
151 `-q'
152 Do not print messages saying which checks are being made.
153
154 `--srcdir=DIR'
155 Look for the package's source code in directory DIR. Usually
156 `configure' can determine that directory automatically.
157
158 `--version'
159 Print the version of Autoconf used to generate the `configure'
160 script, and exit.
161
162 `configure' also accepts some other, not widely useful, options.
163
164 Optional Features
165 =================
166
167 The readline `configure' recognizes two `--with-PACKAGE' options:
168
169 `--with-curses'
170 This tells readline that it can find the termcap library functions
171 (tgetent, et al.) in the curses library, rather than a separate
172 termcap library. Readline uses the termcap functions, but does not
173 usually link with the termcap or curses library itself, allowing
174 applications which link with readline the to choose an appropriate
175 library. This option tells readline to link the example programs with
176 the curses library rather than libtermcap.
177
178 `--with-shared-termcap-library'
179 This tells the readline build process to link the shared version of
180 libreadline against a shared version of the curses or termcap library
181 (see the description of SHLIB_LIBS below under `Shared Libraries').
182 This relieves the application of having to link with curses or termcap
183 itself, but does not allow the application to choose which library to
184 use. This is only effective on systems that build shared libraries (see
185 below; the default for shared libraries is `yes').
186
187 `configure' also recognizes several `--enable-FEATURE' options:
188
189 `--enable-bracketed-paste-default'
190 Enable bracketed paste by default, so the initial value of the
191 `enable-bracketed-paste' Readline variable is `on'. The default
192 is `yes'.
193
194 `--enable-install-examples'
195 Install the readline example programs as part of `make install'.
196
197 `--enable-multibyte'
198 Build with support for multibyte characters enabled on systems with the
199 necessary framework (locale definitions, C library functions, etc.). The
200 default is `yes'.
201
202 `--enable-shared'
203 Build the shared libraries by default on supported platforms. The
204 default is `yes'.
205
206 `--enable-static'
207 Build the static libraries by default. The default is `yes'.
208
209 Shared Libraries
210 ================
211
212 There is support for building shared versions of the readline and
213 history libraries. The configure script creates a Makefile in
214 the `shlib' subdirectory, and typing `make shared' will cause
215 shared versions of the readline and history libraries to be built
216 on supported platforms.
217
218 If `configure' is given the `--enable-shared' option, it will attempt
219 to build the shared libraries by default on supported platforms. This
220 option is enabled by default.
221
222 Configure calls the script support/shobj-conf to test whether or
223 not shared library creation is supported and to generate the values
224 of variables that are substituted into shlib/Makefile. If you
225 try to build shared libraries on an unsupported platform, `make'
226 will display a message asking you to update support/shobj-conf for
227 your platform.
228
229 If you need to update support/shobj-conf, you will need to create
230 a `stanza' for your operating system and compiler. The script uses
231 the value of host_os and ${CC} as determined by configure. For
232 instance, FreeBSD 4.2 with any version of gcc is identified as
233 `freebsd4.2-gcc*'.
234
235 In the stanza for your operating system-compiler pair, you will need to
236 define several variables. They are:
237
238 SHOBJ_CC The C compiler used to compile source files into shareable
239 object files. This is normally set to the value of ${CC}
240 by configure, and should not need to be changed.
241
242 SHOBJ_CFLAGS Flags to pass to the C compiler ($SHOBJ_CC) to create
243 position-independent code. If you are using gcc, this
244 should probably be set to `-fpic'.
245
246 SHOBJ_LD The link editor to be used to create the shared library from
247 the object files created by $SHOBJ_CC. If you are using
248 gcc, a value of `gcc' will probably work.
249
250 SHOBJ_LDFLAGS Flags to pass to SHOBJ_LD to enable shared object creation.
251 If you are using gcc, `-shared' may be all that is necessary.
252 These should be the flags needed for generic shared object
253 creation.
254
255 SHLIB_XLDFLAGS Additional flags to pass to SHOBJ_LD for shared library
256 creation. Many systems use the -R option to the link
257 editor to embed a path within the library for run-time
258 library searches. A reasonable value for such systems would
259 be `-R$(libdir)'.
260
261 SHLIB_LIBS Any additional libraries that shared libraries should be
262 linked against when they are created.
263
264 SHLIB_LIBPREF The prefix to use when generating the filename of the shared
265 library. The default is `lib'; Cygwin uses `cyg'.
266
267 SHLIB_LIBSUFF The suffix to add to `libreadline' and `libhistory' when
268 generating the filename of the shared library. Many systems
269 use `so'; HP-UX uses `sl'.
270
271 SHLIB_LIBVERSION The string to append to the filename to indicate the version
272 of the shared library. It should begin with $(SHLIB_LIBSUFF),
273 and possibly include version information that allows the
274 run-time loader to load the version of the shared library
275 appropriate for a particular program. Systems using shared
276 libraries similar to SunOS 4.x use major and minor library
277 version numbers; for those systems a value of
278 `$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)$(SHLIB_MINOR)' is appropriate.
279 Systems based on System V Release 4 don't use minor version
280 numbers; use `$(SHLIB_LIBSUFF).$(SHLIB_MAJOR)' on those systems.
281 Other Unix versions use different schemes.
282
283 SHLIB_DLLVERSION The version number for shared libraries that determines API
284 compatibility between readline versions and the underlying
285 system. Used only on Cygwin. Defaults to $SHLIB_MAJOR, but
286 can be overridden at configuration time by defining DLLVERSION
287 in the environment.
288
289 SHLIB_DOT The character used to separate the name of the shared library
290 from the suffix and version information. The default is `.';
291 systems like Cygwin which don't separate version information
292 from the library name should set this to the empty string.
293
294 SHLIB_STATUS Set this to `supported' when you have defined the other
295 necessary variables. Make uses this to determine whether
296 or not shared library creation should be attempted. If
297 shared libraries are not supported, this will be set to
298 `unsupported'.
299
300 You should look at the existing stanzas in support/shobj-conf for ideas.
301
302 Once you have updated support/shobj-conf, re-run configure and type
303 `make shared' or `make'. The shared libraries will be created in the
304 shlib subdirectory.
305
306 If shared libraries are created, `make install' will install them.
307 You may install only the shared libraries by running `make
308 install-shared' from the top-level build directory. Running `make
309 install' in the shlib subdirectory will also work. If you don't want
310 to install any created shared libraries, run `make install-static'.