(c) COPYRIGHT MIT 1995. Please first read the full copyright statement in the file COPYRIGH.
These installation instructions are based on the suggested instructions provided with GNU Autoconf 2.0.
The `configure' shell script attempts to guess correct values for various system-dependent variables used during compilation. It uses those values to create a `Makefile' and a `config.h' file containing system-dependent definitions. Finally, it creates a shell script `config.status' that you can run in the future to recreate the current configuration, a file `config.cache' that saves the results of its tests to speed up reconfiguring, and a file `config.log' containing compiler output (useful mainly for debugging `configure').
The simplest way to compile this package on a Unix platform is:
Some systems require unusual options for compilation or linking that the `configure' script does not know about. You can give `configure' initial values for variables by setting them in the environment. Using a Bourne-compatible shell, you can do that on the command line like this:
CC=c89 CFLAGS=-O2 LIBS=-lposix ./configure
Or on systems that have the `env' program, you can do it like this:
env CPPFLAGS=-I/usr/local/include LDFLAGS=-s ./configure
You can compile the package in a directory different from the one containing the source code. Doing so allows you to compile it on more than one kind of computer at the same time. To do this, you must use a version of `make' that supports the `VPATH' variable, such as GNU `make.' `cd' to the directory where you want to object files and library to go and run the `configure' script (i.e., go `../src/configure'). `configure' automatically checks for source code in the directory that `configure' is in and in `..' as well.
By default, `make install' will install the library in `/usr/local/lib.' You can specify an installation prefix other than `/usr/local' by giving `configure' the option `--prefix=PATH.' You can cause the library to be installed with an extra prefix or suffix on its name by giving `configure' the options `--program-prefix=PREFIX' or `--program-suffix=SUFFIX.'
There are four options you can give to `configure' in addition to those understood by all GNU Autoconf `configure' scripts:
_POSIX_SOURCE
define which guarantees that
the code only contains strictly POSIX compliant features.
There may be some features `configure' can not figure out automatically, but needs to determine by the type of host the package will run on. Usually `configure' can figure that out, but if it prints a message saying it can not guess the host type, give it the `--host=TYPE' option. TYPE can either be a short name for the system type, such as `sun4', or a canonical name with three fields:
CPU-COMPANY-SYSTEM
See the file `config.sub' for the possible values of each field. If `config.sub' isn't included in this package, then this package doesn't need to know the host type.
If you are building compiler tools for cross-compiling, you can also use the `--target=TYPE' option to select the type of system they will produce code for and the `--build=TYPE' option to select the type of system on which you are compiling the package.
If you want to set default values for `configure' scripts to share, you can create a site shell script called `config.site' that gives default values for variables like `CC', `cache_file', and `prefix'. `configure' looks for `PREFIX/share/config.site' if it exists, then `PREFIX/etc/config.site' if it exists. Or, you can set the `CONFIG_SITE' environment variable to the location of the site script. A warning: not all `configure' scripts look for a site script.
`configure' recognizes the following options to control how it operates.