OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [doc/] [html/] [cdl-guide/] [ref.compile.html] - Blame information for rev 588

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 28 unneback
<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
2
<!-- This material may be distributed only subject to the terms      -->
3
<!-- and conditions set forth in the Open Publication License, v1.0  -->
4
<!-- or later (the latest version is presently available at          -->
5
<!-- http://www.opencontent.org/openpub/).                           -->
6
<!-- Distribution of the work or derivative of the work in any       -->
7
<!-- standard (paper) book form is prohibited unless prior           -->
8
<!-- permission is obtained from the copyright holder.               -->
9
<HTML
10
><HEAD
11
><TITLE
12
>compile</TITLE
13
><meta name="MSSmartTagsPreventParsing" content="TRUE">
14
<META
15
NAME="GENERATOR"
16
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
17
"><LINK
18
REL="HOME"
19
TITLE="The eCos Component Writer's Guide"
20
HREF="cdl-guide.html"><LINK
21
REL="UP"
22
TITLE="CDL Language Specification"
23
HREF="reference.html"><LINK
24
REL="PREVIOUS"
25
TITLE="calculated"
26
HREF="ref.calculated.html"><LINK
27
REL="NEXT"
28
TITLE="default_value"
29
HREF="ref.default-value.html"></HEAD
30
><BODY
31
CLASS="REFENTRY"
32
BGCOLOR="#FFFFFF"
33
TEXT="#000000"
34
LINK="#0000FF"
35
VLINK="#840084"
36
ALINK="#0000FF"
37
><DIV
38
CLASS="NAVHEADER"
39
><TABLE
40
SUMMARY="Header navigation table"
41
WIDTH="100%"
42
BORDER="0"
43
CELLPADDING="0"
44
CELLSPACING="0"
45
><TR
46
><TH
47
COLSPAN="3"
48
ALIGN="center"
49
>The <SPAN
50
CLASS="APPLICATION"
51
>eCos</SPAN
52
> Component Writer's Guide</TH
53
></TR
54
><TR
55
><TD
56
WIDTH="10%"
57
ALIGN="left"
58
VALIGN="bottom"
59
><A
60
HREF="ref.calculated.html"
61
ACCESSKEY="P"
62
>Prev</A
63
></TD
64
><TD
65
WIDTH="80%"
66
ALIGN="center"
67
VALIGN="bottom"
68
></TD
69
><TD
70
WIDTH="10%"
71
ALIGN="right"
72
VALIGN="bottom"
73
><A
74
HREF="ref.default-value.html"
75
ACCESSKEY="N"
76
>Next</A
77
></TD
78
></TR
79
></TABLE
80
><HR
81
ALIGN="LEFT"
82
WIDTH="100%"></DIV
83
><H1
84
><A
85
NAME="REF.COMPILE"><SPAN
86
CLASS="PROPERTY"
87
>compile</SPAN
88
></H1
89
><DIV
90
CLASS="REFNAMEDIV"
91
><A
92
NAME="AEN3815"
93
></A
94
><H2
95
>Name</H2
96
>Property <SPAN
97
CLASS="PROPERTY"
98
>compile</SPAN
99
>&nbsp;--&nbsp;List the source files that should be built if this option
100
is active and enabled.</DIV
101
><DIV
102
CLASS="REFSYNOPSISDIV"
103
><A
104
NAME="AEN3819"><H2
105
>Synopsis</H2
106
><TABLE
107
BORDER="5"
108
BGCOLOR="#E0E0F0"
109
WIDTH="70%"
110
><TR
111
><TD
112
><PRE
113
CLASS="SYNOPSIS"
114
>cdl_option &lt;name&gt; {
115
    compile [-library=libxxx.a] &lt;list of files&gt;
116
    &#8230;
117
}</PRE
118
></TD
119
></TR
120
></TABLE
121
></DIV
122
><DIV
123
CLASS="REFSECT1"
124
><A
125
NAME="AEN3821"
126
></A
127
><H2
128
>Description</H2
129
><P
130
>The <SPAN
131
CLASS="PROPERTY"
132
>compile</SPAN
133
> property allows component developers to specify source
134
files which should be compiled and added to one of the target
135
libraries. Usually each source file will end up the library
136
<TT
137
CLASS="FILENAME"
138
>libtarget.a</TT
139
>. It is possible for component writers
140
to specify an alternative library for an entire package using the
141
<A
142
HREF="ref.library.html"
143
><SPAN
144
CLASS="PROPERTY"
145
>library</SPAN
146
></A
147
> property. Alternatively
148
the desired library can be specified on the <SPAN
149
CLASS="PROPERTY"
150
>compile</SPAN
151
> line itself. For
152
example, to add a particular source file to the
153
<TT
154
CLASS="FILENAME"
155
>libextras.a</TT
156
> library the following could be used:</P
157
><TABLE
158
BORDER="5"
159
BGCOLOR="#E0E0F0"
160
WIDTH="70%"
161
><TR
162
><TD
163
><PRE
164
CLASS="PROGRAMLISTING"
165
>cdl_package CYGPKG_IO_SERIAL {
166
    &#8230;
167
    compile -library=libextras.a common/tty.c
168
}</PRE
169
></TD
170
></TR
171
></TABLE
172
><P
173
>Details of the build process including such issues as compiler flags
174
and the order in which things happen can be found in
175
<A
176
HREF="build.html"
177
>Chapter 4</A
178
>. </P
179
><P
180
><SPAN
181
CLASS="PROPERTY"
182
>compile</SPAN
183
> properties can occur in any of <TT
184
CLASS="LITERAL"
185
>cdl_option</TT
186
>,
187
<TT
188
CLASS="LITERAL"
189
>cdl_component</TT
190
>, <TT
191
CLASS="LITERAL"
192
>cdl_package</TT
193
> or <TT
194
CLASS="LITERAL"
195
>cdl_interface</TT
196
>. A <SPAN
197
CLASS="PROPERTY"
198
>compile</SPAN
199
>
200
property has effect if and only if the entity that contains it is
201
active and enabled. Typically the body of a <TT
202
CLASS="LITERAL"
203
>cdl_package</TT
204
> will define
205
any source files that need to be built irrespective of individual
206
options, and each <TT
207
CLASS="LITERAL"
208
>cdl_component</TT
209
>, <TT
210
CLASS="LITERAL"
211
>cdl_option</TT
212
>, and <TT
213
CLASS="LITERAL"
214
>cdl_interface</TT
215
>
216
will define source files that are more specific. A single <SPAN
217
CLASS="PROPERTY"
218
>compile</SPAN
219
>
220
property can list any number of source files, all destined for the
221
same library. A <TT
222
CLASS="LITERAL"
223
>cdl_option</TT
224
> or other entity can contain multiple
225
<SPAN
226
CLASS="PROPERTY"
227
>compile</SPAN
228
> properties, each of which can specify a different library.
229
It is possible for a given source file to be specified in <SPAN
230
CLASS="PROPERTY"
231
>compile</SPAN
232
>
233
properties for several different options, in which case the source
234
file will get built if any of these options are active and enabled.</P
235
><P
236
>If the package follows the <A
237
HREF="package.html#PACKAGE.HIERARCHY"
238
>directory
239
layout conventions</A
240
> then the configuration tools will search for
241
the specified source files first in the
242
<TT
243
CLASS="FILENAME"
244
>src</TT
245
> subdirectory of the
246
package, then relative to the package directory itself. </P
247
><DIV
248
CLASS="NOTE"
249
><BLOCKQUOTE
250
CLASS="NOTE"
251
><P
252
><B
253
>Note: </B
254
>A shortcoming of the current specification of <SPAN
255
CLASS="PROPERTY"
256
>compile</SPAN
257
> properties is
258
that there is no easy way to specify source files that should be built
259
unless an option is enabled. It would sometimes be useful to be able
260
to say: &#8220;if option <TT
261
CLASS="LITERAL"
262
>A</TT
263
> is enabled then compile
264
file <TT
265
CLASS="FILENAME"
266
>x.c</TT
267
>, otherwise compile file
268
<TT
269
CLASS="FILENAME"
270
>y.c</TT
271
>. There are two simple ways of achieving this: </P
272
><P
273
></P
274
><UL
275
><LI
276
><P
277
>Always compile <TT
278
CLASS="FILENAME"
279
>y.c</TT
280
>, typically by listing it in
281
the body of the <TT
282
CLASS="LITERAL"
283
>cdl_package</TT
284
>, but use
285
<TT
286
CLASS="LITERAL"
287
>#ifndef&nbsp;A</TT
288
> to produce an empty object file if
289
option <TT
290
CLASS="LITERAL"
291
>A</TT
292
> is not enabled. This has the big
293
disadvantage that the file always gets compiled and hence for some
294
configurations builds will take longer than necessary.</P
295
></LI
296
><LI
297
><P
298
>Use a <SPAN
299
CLASS="PROPERTY"
300
>calculated</SPAN
301
> option whose value is <TT
302
CLASS="LITERAL"
303
>!A</TT
304
>, and
305
have a <TT
306
CLASS="LITERAL"
307
>compile&nbsp;y.c</TT
308
> property in its body. This
309
has the big disadvantage of adding another calculated option to the
310
configuration.</P
311
></LI
312
></UL
313
><P
314
>It is likely that this will be resolved in the future, possibly by
315
using some sort of expression as the argument to a <SPAN
316
CLASS="PROPERTY"
317
>compile</SPAN
318
> property.</P
319
></BLOCKQUOTE
320
></DIV
321
><DIV
322
CLASS="NOTE"
323
><BLOCKQUOTE
324
CLASS="NOTE"
325
><P
326
><B
327
>Note: </B
328
>Currently it is not possible to control the priority of a <SPAN
329
CLASS="PROPERTY"
330
>compile</SPAN
331
>
332
property, in other words the order in which a file gets compiled
333
relative to other build steps. This functionality might prove useful
334
for complicated packages and should be added.</P
335
></BLOCKQUOTE
336
></DIV
337
></DIV
338
><DIV
339
CLASS="REFSECT1"
340
><A
341
NAME="AEN3874"
342
></A
343
><H2
344
>Example</H2
345
><TABLE
346
BORDER="5"
347
BGCOLOR="#E0E0F0"
348
WIDTH="70%"
349
><TR
350
><TD
351
><PRE
352
CLASS="PROGRAMLISTING"
353
>cdl_package CYGPKG_INFRA {
354
    display       "Infrastructure"
355
    include_dir   cyg/infra
356
    description   "
357
        Common types and useful macros.
358
        Tracing and assertion facilities.
359
        Package startup options."
360
 
361
    compile startup.cxx prestart.cxx pkgstart.cxx userstart.cxx \
362
            dummyxxmain.cxx memcpy.c memset.c delete.cxx \
363
            diag.cxx tcdiag.cxx
364
}</PRE
365
></TD
366
></TR
367
></TABLE
368
></DIV
369
><DIV
370
CLASS="REFSECT1"
371
><A
372
NAME="AEN3877"
373
></A
374
><H2
375
>See Also</H2
376
><P
377
>Properties <A
378
HREF="ref.make.html"
379
>make</A
380
>,
381
<A
382
HREF="ref.make-object.html"
383
>make_object</A
384
> and
385
<A
386
HREF="ref.library.html"
387
>library</A
388
>.</P
389
></DIV
390
><DIV
391
CLASS="NAVFOOTER"
392
><HR
393
ALIGN="LEFT"
394
WIDTH="100%"><TABLE
395
SUMMARY="Footer navigation table"
396
WIDTH="100%"
397
BORDER="0"
398
CELLPADDING="0"
399
CELLSPACING="0"
400
><TR
401
><TD
402
WIDTH="33%"
403
ALIGN="left"
404
VALIGN="top"
405
><A
406
HREF="ref.calculated.html"
407
ACCESSKEY="P"
408
>Prev</A
409
></TD
410
><TD
411
WIDTH="34%"
412
ALIGN="center"
413
VALIGN="top"
414
><A
415
HREF="cdl-guide.html"
416
ACCESSKEY="H"
417
>Home</A
418
></TD
419
><TD
420
WIDTH="33%"
421
ALIGN="right"
422
VALIGN="top"
423
><A
424
HREF="ref.default-value.html"
425
ACCESSKEY="N"
426
>Next</A
427
></TD
428
></TR
429
><TR
430
><TD
431
WIDTH="33%"
432
ALIGN="left"
433
VALIGN="top"
434
><SPAN
435
CLASS="PROPERTY"
436
>calculated</SPAN
437
></TD
438
><TD
439
WIDTH="34%"
440
ALIGN="center"
441
VALIGN="top"
442
><A
443
HREF="reference.html"
444
ACCESSKEY="U"
445
>Up</A
446
></TD
447
><TD
448
WIDTH="33%"
449
ALIGN="right"
450
VALIGN="top"
451
><SPAN
452
CLASS="PROPERTY"
453
>default_value</SPAN
454
></TD
455
></TR
456
></TABLE
457
></DIV
458
></BODY
459
></HTML
460
>

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.