1 /* ../options.h. Generated automatically by configure. */
2 /* --------------------------------------------------------------------------
3 * Configuration options
5 * Most configuration options are arguments to the configure script
6 * (try running "configure --help"). The following options are either
7 * experimental or require changes to "Prelude.hs", the standard libraries
8 * and demos and therefore cannot be modified using the configure script.
9 * Most users should leave them alone!
11 * Copyright (c) The University of Nottingham and Yale University, 1994-1997.
12 * All rights reserved. See NOTICE for details and conditions of use etc...
13 * Hugs version 1.4, December 1997
15 * $RCSfile: options.h,v $
17 * $Date: 1999/12/07 11:55:25 $
18 * ------------------------------------------------------------------------*/
21 /* --------------------------------------------------------------------------
22 * Hugs paths and directories
23 * ------------------------------------------------------------------------*/
25 /* Define this as the default setting of HUGSPATH.
26 * Value may contain string "{Hugs}" (for which we will substitute the
27 * value of HUGSDIR) and should be either colon-separated (Unix)
28 * or semicolon-separated (Macintosh, Windows, DOS). Escape
29 * characters in the path string are interpreted according to normal
30 * Haskell conventions.
32 * This value can be overridden from the command line by setting the
33 * HUGSFLAGS environment variable or by storing an appropriate value
34 * for HUGSFLAGS in the registry (Win32 only). In all cases, use a
35 * string of the form -P"...".
39 /* The directory name which is substituted for the string "{Hugs}"
40 * in a path variable. This normally points to where the Hugs libraries
41 * are installed - ie so that the file HUGSDIR/lib/Prelude.hs exists
43 * "/usr/local/lib/hugs"
44 * "/usr/homes/JFHaskell/hugs"
47 * This value is ignored on Windows and Macintosh versions since
48 * it is assumed that the binary is installed in HUGSDIR.
50 * This value cannot be overridden from the command line or by using
51 * environment variables. This isn't quite as limiting as you'd think
52 * since you can always choose _not_ to use the {Hugs} variable - however,
53 * it's obviously _nicer_ to have it set correctly.
60 /* --------------------------------------------------------------------------
61 * User interface options
62 * ------------------------------------------------------------------------*/
64 /* Define if you want to use the "Hugs for Windows" GUI.
65 * (Windows 3.1 and compatibles only)
67 #define HUGS_FOR_WINDOWS 0
69 /* Define if you want filenames to be converted to normal form by:
70 * o replacing relative pathnames with absolute pathnames and
71 * eliminating .. and . where possible.
72 * o converting to lower case (only in case-insensitive filesystems)
74 #define PATH_CANONICALIZATION 0
76 /* Define if you want the small startup banner.
78 #define SMALL_BANNER 0
80 /* Define if you want to be able to redirect stdout/stderr to a buffer.
81 * Only necessary for the Hugs server interface (which is used in the
82 * Netscape plugin and the standalone evaluator "runhugs").
84 #define REDIRECT_OUTPUT (!HUGS_FOR_WINDOWS)
87 /* --------------------------------------------------------------------------
89 * ------------------------------------------------------------------------*/
91 /* Define one of these to select overall size of Hugs
92 * SMALL_HUGS for 16 bit operation on a limited memory PC.
93 * REGULAR_HUGS for 32 bit operation using largish default table sizes.
94 * LARGE_HUGS for 32 bit operation using larger default table sizes.
97 #define REGULAR_HUGS 0
100 #define NUM_SYNTAX 100
101 #define NUM_TUPLES 20
102 #define NUM_OFFSETS 1024
103 #define NUM_CHARS 256
107 #define CHAR_MASK 0xff
109 #if SMALL_HUGS /* the McDonalds mentality :-) */
110 #define Pick(s,r,l) s
113 #define Pick(s,r,l) r
116 #define Pick(s,r,l) l
119 #define MINIMUMHEAP Pick(7500, 19000, 19000)
120 #define MAXIMUMHEAP Pick(32765, 0, 0)
121 #define DEFAULTHEAP Pick(28000, 50000, 350000)
123 #define NUM_SCRIPTS Pick(64, 100, 100)
124 #define NUM_MODULE NUM_SCRIPTS
125 #define NUM_TYCON Pick(60, 160, 400)
126 #define NUM_NAME Pick(1000, 2000, 16000)
127 #define NUM_CLASSES Pick(30, 40, 80)
128 #define NUM_INSTS Pick(200, 300, 600)
129 #define NUM_TEXT Pick(12000, 20000, 100000)
130 #define NUM_TEXTH Pick(1, 10, 10)
131 #define NUM_TYVARS Pick(800, 2000, 4000)
132 #define NUM_STACK Pick(1800, 12000, 16000)
133 #define NUM_DTUPLES Pick(3, 5, 5)
135 #define MAXPOSINT 0x7fffffff
136 #define MINNEGINT (-MAXPOSINT-1)
137 #define MAXHUGSWORD 0xffffffffU
139 #define BIGBASE Pick(100, 10000, 10000)
140 #define BIGEXP Pick(2, 4, 4)
142 #define minRecovery Pick(1000, 1000, 1000)
143 #define bitsPerWord Pick(16, 32, 32)
144 #define wordShift Pick(4, 5, 5)
145 #define wordMask Pick(15, 31, 31)
147 /* Define to force a fixed size (NUM_TYVARS) for the current substitution.
148 * Setting this flag places a limit on the maximum complexity of
149 * expressions handled by the typechecker. It is normally turned off
150 * but may be required for small machines/configurations.
152 #define FIXED_SUBST 0
154 /* Define this to allocate tables dynamically.
155 * This is currently just a memory saving trick, but this may be
156 * extended at a later stage to allow at least some of the tables
157 * to be extended dynamically at run-time to avoid exhausted space errors.
159 #define DYN_TABLES SMALL_HUGS
161 /* Define this to include support for storing pointers in the heap.
162 * This is required by the code generator (which has to store
163 * pointers to AsmObjects).
165 #define PTR_ON_HEAP 1
167 /* Should quantifiers be displayed in error messages.
168 * Warning: not consistently used.
170 #define DISPLAY_QUANTIFIERS 0
172 /* Flags to determine which raw representations and operations are available
174 * o if you turn everything on, you might end up with more then 256
175 * bytecodes: check the value of i_ccall (the lst bytecode) to check
176 * (JRS), 22apr99: I don't think any of the #undef'd ones will work
177 * without attention. However, standard Haskell 98 is supported
178 * is supported without needing them.
180 #undef PROVIDE_STABLE
181 #undef PROVIDE_FOREIGN
183 #undef PROVIDE_CONCURRENT
184 #undef PROVIDE_PTREQUALITY
185 #undef PROVIDE_COERCE
188 /* Set to 1 to use a non-GMP implementation of integer, in the
189 standalone Hugs. Set to 0 in the combined GHC-Hugs system,
190 in which case GNU MP will be used.
192 #define STANDALONE_INTEGER 1
194 /* Enable a crude profiler which counts BCO entries, bytes allocated
195 and bytecode insns executed on a per-fn basis. Used for assessing
196 the effect of the simplifier/optimiser.
198 #undef CRUDE_PROFILING
201 /* Is the default default (Int,Double) or (Integer,Double)?
203 #define DEFAULT_BIGNUM 1
205 /* Are things being used in an interactive setting or a batch setting?
206 * In an interactive setting, System.exitWith should not call _exit
207 * getProgName and getProgArgs need to be handled differently, etc.
209 * Warning: this flag is ignored by an awful lot of code.
213 /* Turn bytecode interpreter support on/off.
215 #define INTERPRETER 1
217 /* Turn on debugging output and some sanity checks
221 /* NB: LAZY_BLACKHOLING has been moved up to Stg.h where both Hugs and GHC can see it,
222 * and EAGER_BLACKHOLING has been introduced also. KSW 1999-01.
225 /* Turn miniinterpreter on/off.
227 * The mininterpreter is portable but slow - if you turn it off,
228 * you'll probably need to provide some assembly language support
229 * for your architecture.
231 #define USE_MINIINTERPRETER 1
233 /* Turn registerisation on/off.
235 * If you turn this off, you'll probably need to provide some
236 * assembly language support for your architecture.
241 /* --------------------------------------------------------------------------
243 * ------------------------------------------------------------------------*/
245 /* Define if T-REX; Typed Rows and EXtension should be enabled */
246 /* Doesn't work in current system - I don't know what the primops do */
249 /* Define if :xplain should be enabled */
250 #define EXPLAIN_INSTANCE_RESOLUTION 0
253 /* Define if you want to run Haskell code through a preprocessor
255 * Note that the :reload command doesn't know about any dependencies
256 * introduced by using #include so you must :load (not :reload) if
257 * you change any #included files (such as configuration files).
259 #define USE_PREPROCESSOR 1
261 /* Define if you want to time every evaluation.
263 * Timing is included in the Hugs distribution for the purpose of benchmarking
264 * the Hugs interpreter, comparing its performance across a variety of
265 * different machines, and with other systems for similar languages.
267 * It would be somewhat foolish to try to use the timings produced in this
268 * way for any other purpose. In particular, using timings to compare the
269 * performance of different versions of an algorithm is likely to give very
270 * misleading results. The current implementation of Hugs as an interpreter,
271 * without any significant optimizations, means that there are much more
272 * significant overheads than can be accounted for by small variations in
275 /* #undef WANT_TIMER */
278 /* --------------------------------------------------------------------------
281 * These options are mostly used for developing/debugging the system.
282 * Since they turn off required parts of the Haskell language, you'll
283 * probably need to modify Prelude.hs and the libraries if you change
285 * ------------------------------------------------------------------------*/
287 /* Define if single-element dictionaries are implemented by newtype.
288 * Should be turned on. Mostly used to make it easier to find which
289 * bits of code implement this optimisation and as a way of documenting
292 #define USE_NEWTYPE_FOR_DICTS 1
294 /* Define if strings should be represented as normal C strings.
295 * Note that this doesn't work if the string contains '\0'
296 * and makes persistence problematic.
297 * Intended as a stop-gap measure until mutable byte arrays are available.
299 #define USE_ADDR_FOR_STRINGS 1
301 /* Define to include support for (n+k) patterns.
302 * Warning: many people in the Haskell committee want to remove n+k patterns.
307 /* --------------------------------------------------------------------------
308 * Debugging options (intended for use by maintainers)
309 * ------------------------------------------------------------------------*/
311 /* Define if debugging generated bytecodes or the bytecode interpreter */
314 /* Define if you want to use a low-level printer from within a debugger */
315 #define DEBUG_PRINTER 1
317 /* --------------------------------------------------------------------------
318 * Experimental features
319 * These are likely to disappear/change in future versions and should not
320 * be used by most people..
321 * ------------------------------------------------------------------------*/
323 /* In a plain Hugs system, most signals (SIGBUS, SIGTERM, etc) indicate
324 * some kind of error in Hugs - or maybe a stack overflow. Rather than
325 * just crash, Hugs catches these errors and returns to the main loop.
326 * It does this by calling a function "panic" which longjmp's back to the
328 * If you're developing a GreenCard library, this may not be the right
329 * behaviour - it's better if Hugs leaves them for your debugger to
330 * catch rather than trapping them and "panicking".
335 /* ----------------------------------------------------------------------- */