@c -*-texinfo-*-
@c This is part of the GNU Guile Reference Manual.
-@c Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008
+@c Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008, 2009, 2010
@c Free Software Foundation, Inc.
@c See the file guile.texi for copying conditions.
-@page
@node Options and Config
@section Configuration, Features and Runtime Options
@deffnx {C Function} scm_sys_library_dir ()
Return the name of the directory where the Guile Scheme files that
belong to the core Guile installation (as opposed to files from a 3rd
-party package) are installed. On Unix-like systems, this is usually
+party package) are installed. On Unix-like systems this is usually
@file{/usr/local/share/guile/<GUILE_EFFECTIVE_VERSION>} or
-@file{/usr/share/guile/<GUILE_EFFECTIVE_VERSION>}, for example:
-@file{/usr/local/share/guile/1.6}.
+@file{/usr/share/guile/<GUILE_EFFECTIVE_VERSION>};
+
+@noindent for example @file{/usr/local/share/guile/1.6}.
@end deffn
@deffn {Scheme Procedure} %site-dir
@defvar %load-path
List of directories which should be searched for Scheme modules and
libraries. @code{%load-path} is initialized when Guile starts up to
-@code{(list (%site-dir) (%library-dir) (%package-data-dir) ".")},
+@code{(list (%site-dir) (%library-dir) (%package-data-dir))},
prepended with the contents of the GUILE_LOAD_PATH environment variable,
if it is set.
@end defvar
is returned.
@end deffn
-@deffn {Scheme Procedure} search-path path filename [extensions]
-@deffnx {C Function} scm_search_path (path, filename, extensions)
+@deffn {Scheme Procedure} search-path path filename [extensions [require-exts?]]
+@deffnx {C Function} scm_search_path (path, filename, rest)
Search @var{path} for a directory containing a file named
@var{filename}. The file must be readable, and not a directory.
If we find one, return its full filename; otherwise, return
@code{#f}. If @var{filename} is absolute, return it unchanged.
If given, @var{extensions} is a list of strings; for each
directory in @var{path}, we search for @var{filename}
-concatenated with each @var{extension}.
+concatenated with each @var{extension}. If @var{require-exts?}
+is true, require that the returned file name have one of the
+given extensions; if @var{require-exts?} is not given, it
+defaults to @code{#f}.
+
+For compatibility with Guile 1.8 and earlier, the C function takes only
+three arguments
@end deffn
@defvar %guile-build-info
libtool compatible and has form CURRENT:REVISION:AGE
(@pxref{Versioning,, Library interface versions, libtool, GNU
Libtool}). The value for @code{buildstamp} is the output of the
-date(1) command.
+command @samp{date -u +'%Y-%m-%d %T'} (UTC).
In the source, @code{%guile-build-info} is initialized from
libguile/libpath.h, which is completely generated, so deleting this file
before a build guarantees up-to-date values for that build.
@end defvar
+@cindex GNU triplet
+@cindex canonical host type
+
+@defvar %host-type
+The canonical host type (GNU triplet) of the host Guile was configured
+for, e.g., @code{"x86_64-unknown-linux-gnu"} (@pxref{Canonicalizing,,,
+autoconf, The GNU Autoconf Manual}).
+@end defvar
@node Feature Tracking
@subsection Feature Tracking
* Reader options::
* Printing options::
* Debugger options::
-* Evaluator options::
* Evaluator trap options::
* Examples of option use::
@end menu
@subsubsection Low Level Options Interfaces
@deffn {Scheme Procedure} read-options-interface [setting]
-@deffnx {Scheme Procedure} eval-options-interface [setting]
@deffnx {Scheme Procedure} print-options-interface [setting]
@deffnx {Scheme Procedure} debug-options-interface [setting]
@deffnx {Scheme Procedure} evaluator-traps-interface [setting]
case-insensitive no Convert symbols to lower case.
positions yes Record positions of source code expressions.
copy no Copy source code expressions.
+r6rs-hex-escapes no Use R6RS-style string hex escapes
@end smalllisp
Notice that while Standard Scheme is case insensitive, to ease
To make Guile case insensitive, you can type
-@smalllisp
+@lisp
(read-enable 'case-insensitive)
-@end smalllisp
+@end lisp
+
+For more information on the effect of the @code{r6rs-hex-escapes} option, see
+(@pxref{String Syntax}).
@node Printing options
@subsubsection Printing options
@end smallexample
-@node Evaluator options
-@subsubsection Evaluator options
-
-These are the evaluator options with their default values, as they are
-printed by typing @code{(eval-options 'full)} in Guile.
-
-@smallexample
-stack 22000 Size of thread stacks (in machine words).
-@end smallexample
-
-
@node Evaluator trap options
@subsubsection Evaluator trap options
[FIXME: These flags, together with their corresponding handlers, are not
@lisp
(debug-set! stack 200000)
@result{}
-(show-file-name #t stack 200000 debug backtrace depth 20 maxdepth 1000 frames 3 indent 10 width 79 procnames cheap)
+(show-file-name #t stack 200000 debug backtrace depth 20
+ maxdepth 1000 frames 3 indent 10 width 79 procnames cheap)
(non-tail-recursive-factorial 500)
@result{}
option examples in a separate session.]
@end enumerate
-
@smalllisp
guile> (define abc "hello")
guile> abc
HCoop / bpt / guile.git / blobdiff