Annotation of OpenXM_contrib2/asir2000/gc/README.Mac, Revision 1.1.1.1
1.1 noro 1: Patrick Beard's Notes for building GC v4.12 with CodeWarrior Pro 2:
2: ----------------------------------------------------------------------------
3: The current build environment for the collector is CodeWarrior Pro 2.
4: Projects for CodeWarrior Pro 2 (and for quite a few older versions)
5: are distributed in the file Mac_projects.sit.hqx. The project file
6: :Mac_projects:gc.prj builds static library versions of the collector.
7: :Mac_projects:gctest.prj builds the GC test suite.
8:
9: Configuring the collector is still done by editing the files
10: :Mac_files:MacOS_config.h and :Mac_files:MacOS_Test_config.h.
11:
12: Lars Farm's suggestions on building the collector:
13: ----------------------------------------------------------------------------
14: Garbage Collection on MacOS - a manual 'MakeFile'
15: -------------------------------------------------
16:
17: Project files and IDE's are great on the Macintosh, but they do have
18: problems when used as distribution media. This note tries to provide
19: porting instructions in pure TEXT form to avoid those problems. A manual
20: 'makefile' if you like.
21:
22: GC version: 4.12a2
23: Codewarrior: CWPro1
24: date: 18 July 1997
25:
26: The notes may or may not apply to earlier or later versions of the
27: GC/CWPro. Actually, they do apply to earlier versions of both except that
28: until recently a project could only build one target so each target was a
29: separate project. The notes will most likely apply to future versions too.
30: Possibly with minor tweaks.
31:
32: This is just to record my experiences. These notes do not mean I now
33: provide a supported port of the GC to MacOS. It works for me. If it works
34: for you, great. If it doesn't, sorry, try again...;-) Still, if you find
35: errors, please let me know.
36:
37: mailto: lars.farm@ite.mh.se
38:
39: address: Lars Farm
40: Krönvägen 33b
41: 856 44 Sundsvall
42: Sweden
43:
44: Porting to MacOS is a bit more complex than it first seems. Which MacOS?
45: 68K/PowerPC? Which compiler? Each supports both 68K and PowerPC and offer a
46: large number of (unique to each environment) compiler settings. Each
47: combination of compiler/68K/PPC/settings require a unique combination of
48: standard libraries. And the IDE's does not select them for you. They don't
49: even check that the library is built with compatible setting and this is
50: the major source of problems when porting the GC (and otherwise too).
51:
52: You will have to make choices when you configure the GC. I've made some
53: choices here, but there are other combinations of settings and #defines
54: that work too.
55:
56: As for target settings the major obstacles may be:
57: - 68K Processor: check "4-byte Ints".
58: - PPC Processor: uncheck "Store Static Data in TOC".
59:
60: What you need to do:
61: ===================
62:
63: 1) Build the GC as a library
64: 2) Test that the library works with 'test.c'.
65: 3) Test that the C++ interface 'gc_cpp.cc/h' works with 'test_cpp.cc'.
66:
67: 1) The Libraries:
68: =================
69: I made one project with four targets (68K/PPC tempmem or appheap). One target
70: will suffice if you're able to decide which one you want. I wasn't...
71:
72: Codewarrior allows a large number of compiler/linker settings. I used these:
73:
74: Settings shared by all targets:
75: ------------------------------
76: o Access Paths:
77: - User Paths: the GC folder
78: - System Paths: {Compiler}:Metrowerks Standard Library:
79: {Compiler}:MacOS Support:Headers:
80: {Compiler}:MacOS Support:MacHeaders:
81: o C/C++ language:
82: - inlining: normal
83: - direct to SOM: off
84: - enable/check: exceptions, RTTI, bool (and if you like pool strings)
85:
86: PowerPC target settings
87: -----------------------
88: o Target Settings:
89: - name of target
90: - MacOS PPC Linker
91: o PPC Target
92: - name of library
93: o C/C++ language
94: - prefix file as described below
95: o PPC Processor
96: - Struct Alignment: PowerPC
97: - uncheck "Store Static Data in TOC" -- important!
98: I don't think the others matter, I use full optimization and its ok
99: o PPC Linker
100: - Factory Settings (SYM file with full paths, faster linking, dead-strip
101: static init, Main: __start)
102:
103:
104: 68K target settings
105: -------------------
106: o Target Settings:
107: - name of target
108: - MacOS 68K Linker
109: o 68K Target
110: - name of library
111: - A5 relative data
112: o C/C++ language
113: - prefix file as described below
114: o 68K Processor
115: - Code model: smart
116: - Struct alignment: 68K
117: - FP: SANE
118: - enable 4-Byte Ints -- important!
119: I don't think the others matter. I selected...
120: - enable: 68020
121: - enable: global register allocation
122: o IR Optimizer
123: - enable: Optimize Space, Optimize Speed
124: I suppose the others would work too, but haven't tried...
125: o 68K Linker
126: - Factory Settings (New Style MacsBug,SYM file with full paths,
127: A6 Frames, fast link, Merge compiler glue into segment 1,
128: dead-strip static init)
129:
130: Prefix Files to configure the GC sources
131: ----------------------------------------
132: The Codewarrior equivalent of commandline compilers -DNAME=X is to use
133: prefix-files. A TEXT file that is automatically #included before the first byte
134: of every source file. I used these:
135:
136: ---- ( cut here ) ---- gc_prefix_tempmem.h -- 68K and PPC -----
137: #include "gc_prefix_common.h"
138: #undef USE_TEMPORARY_MEMORY
139: #define USE_TEMPORARY_MEMORY
140: ---- ( cut here ) ---- gc_prefix_appmem.h -- 68K and PPC -----
141: #include "gc_prefix_common.h"
142: #undef USE_TEMPORARY_MEMORY
143: // #define USE_TEMPORARY_MEMORY
144:
145: ---- ( cut here ) ---- gc_prefix_common.h --------------------
146: // gc_prefix_common.h
147: // ------------------
148: // Codewarrior prefix file to configure the GC libraries
149: //
150: // prefix files are the Codewarrior equivalent of the
151: // command line option -Dname=x frequently seen in makefiles
152:
153: #if !__MWERKS__
154: #error only tried this with Codewarrior
155: #endif
156:
157: #if macintosh
158: #define MSL_USE_PRECOMPILED_HEADERS 0
159: #include <ansi_prefix.mac.h>
160: #ifndef __STDC__
161: #define __STDC__ 0
162: #endif
163:
164: // See list of #defines to configure the library in: 'MakeFile'
165: // see also README
166:
167: #define SILENT // no collection messages. In case
168: // of trouble you might want this off
169: #define ALL_INTERIOR_POINTERS // follows interior pointers.
170: //#define DONT_ADD_BYTE_AT_END // disables the padding if defined.
171: //#define SMALL_CONFIG // whether to use a smaller heap.
172: #define NO_SIGNALS // signals aren't real on the Macintosh.
173: #define ATOMIC_UNCOLLECTABLE // GC_malloc_atomic_uncollectable()
174:
175: // define either or none as per personal preference
176: // used in malloc.c
177: #define REDIRECT_MALLOC GC_malloc
178: //#define REDIRECT_MALLOC GC_malloc_uncollectable
179: // if REDIRECT_MALLOC is #defined make sure that the GC library
180: // is listed before the ANSI/ISO libs in the Codewarrior
181: // 'Link order' panel
182: //#define IGNORE_FREE
183:
184: // mac specific configs
185: //#define USE_TEMPORARY_MEMORY // use Macintosh temporary memory.
186: //#define SHARED_LIBRARY_BUILD // build for use in a shared library.
187:
188: #else
189: // could build Win32 here too, or in the future
190: // Rhapsody PPC-mach, Rhapsody PPC-MacOS,
191: // Rhapsody Intel-mach, Rhapsody Intel-Win32,...
192: // ... ugh this will get messy ...
193: #endif
194:
195: // make sure ints are at least 32-bit
196: // ( could be set to 16-bit by compiler settings (68K) )
197:
198: struct gc_private_assert_intsize_{ char x[ sizeof(int)>=4 ? 1 : 0 ]; };
199:
200: #if __powerc
201: #if __option(toc_data)
202: #error turn off "store static data in TOC" when using GC
203: // ... or find a way to add TOC to the root set...(?)
204: #endif
205: #endif
206: ---- ( cut here ) ---- end of gc_prefix_common.h -----------------
207:
208: Files to build the GC libraries:
209: --------------------------------
210: allchblk.c
211: alloc.c
212: blacklst.c
213: checksums.c
214: dbg_mlc.c
215: finalize.c
216: headers.c
217: mach_dep.c
218: MacOS.c -- contains MacOS code
219: malloc.c
220: mallocx.c
221: mark.c
222: mark_rts.c
223: misc.c
224: new_hblk.c
225: obj_map.c
226: os_dep.c -- contains MacOS code
227: ptr_chck.c
228: reclaim.c
229: stubborn.c
230: typd_mlc.c
231: gc++.cc -- this is 'gc_cpp.cc' with less 'inline' and
232: -- throw std::bad_alloc when out of memory
233: -- gc_cpp.cc works just fine too
234:
235: 2) Test that the library works with 'test.c'.
236: =============================================
237:
238: The test app is just an ordinary ANSI-C console app. Make sure settings
239: match the library you're testing.
240:
241: Files
242: -----
243: test.c
244: the GC library to test -- link order before ANSI libs
245: suitable Mac+ANSI libraries
246:
247: prefix:
248: ------
249: ---- ( cut here ) ---- gc_prefix_testlib.h -- all libs -----
250: #define MSL_USE_PRECOMPILED_HEADERS 0
251: #include <ansi_prefix.mac.h>
252: #undef NDEBUG
253:
254: #define ALL_INTERIOR_POINTERS /* for GC_priv.h */
255: ---- ( cut here ) ----
256:
257: 3) Test that the C++ interface 'gc_cpp.cc/h' works with 'test_cpp.cc'.
258:
259: The test app is just an ordinary ANSI-C console app. Make sure settings match
260: the library you're testing.
261:
262: Files
263: -----
264: test_cpp.cc
265: the GC library to test -- link order before ANSI libs
266: suitable Mac+ANSI libraries
267:
268: prefix:
269: ------
270: same as for test.c
271:
272: For convenience I used one test-project with several targets so that all
273: test apps are build at once. Two for each library to test: test.c and
274: gc_app.cc. When I was satisfied that the libraries were ok. I put the
275: libraries + gc.h + the c++ interface-file in a folder that I then put into
276: the MSL hierarchy so that I don't have to alter access-paths in projects
277: that use the GC.
278:
279: After that, just add the proper GC library to your project and the GC is in
280: action! malloc will call GC_malloc and free GC_free, new/delete too. You
281: don't have to call free or delete. You may have to be a bit cautious about
282: delete if you're freeing other resources than RAM. See gc_cpp.h. You can
283: also keep coding as always with delete/free. That works too. If you want,
284: "include <gc.h> and tweak it's use a bit.
285:
286: Symantec SPM
287: ============
288: It has been a while since I tried the GC in SPM, but I think that the above
289: instructions should be sufficient to guide you through in SPM too. SPM
290: needs to know where the global data is. Use the files 'datastart.c' and
291: 'dataend.c'. Put 'datastart.c' at the top of your project and 'dataend.c'
292: at the bottom of your project so that all data is surrounded. This is not
293: needed in Codewarrior because it provides intrinsic variables
294: __datastart__, __data_end__ that wraps all globals.
295:
296: Source Changes (GC 4.12a2)
297: ==========================
298: Very few. Just one tiny in the GC, not strictly needed.
299: - MacOS.c line 131 in routine GC_MacFreeTemporaryMemory()
300: change # if !defined(SHARED_LIBRARY_BUILD)
301: to # if !defined(SILENT) && !defined(SHARED_LIBRARY_BUILD)
302: To turn off a message when the application quits (actually, I faked
303: this change by #defining SHARED_LIBRARY_BUILD in a statically linked
304: library for more than a year without ill effects but perhaps this is
305: better).
306:
307: - test_cpp.cc
308: made the first lines of main() look like this:
309: ------------
310: int main( int argc, char* argv[] ) {
311: #endif
312: #if macintosh // MacOS
313: char* argv_[] = {"test_cpp","10"}; // doesn't
314: argv=argv_; // have a
315: argc = sizeof(argv_)/sizeof(argv_[0]); // commandline
316: #endif //
317:
318: int i, iters, n;
319: # ifndef __GNUC__
320: alloc dummy_to_fool_the_compiler_into_doing_things_it_currently_cant_handle;
321: ------------
322:
323: - config.h [now gcconfig.h]
324: __MWERKS__ does not have to mean MACOS. You can use Codewarrior to
325: build a Win32 or BeOS library and soon a Rhapsody library. You may
326: have to change that #if...
327:
328:
329:
330: It worked for me, hope it works for you.
331:
332: Lars Farm
333: 18 July 1997
334: ----------------------------------------------------------------------------
335:
336:
337: Patrick Beard's instructions (may be dated):
338:
339: v4.3 of the collector now runs under Symantec C++/THINK C v7.0.4, and
340: Metrowerks C/C++ v4.5 both 68K and PowerPC. Project files are provided
341: to build and test the collector under both development systems.
342:
343: Configuration
344: -------------
345:
346: To configure the collector, under both development systems, a prefix file
347: is used to set preprocessor directives. This file is called "MacOS_config.h".
348: Also to test the collector, "MacOS_Test_config.h" is provided.
349:
350: Testing
351: -------
352:
353: To test the collector (always a good idea), build one of the gctest projects,
354: gctest.¹ (Symantec C++/THINK C), mw/gctest.68K.¹, or mw/gctest.PPC.¹. The
355: test will ask you how many times to run; 1 should be sufficient.
356:
357: Building
358: --------
359:
360: For your convenience project files for the major Macintosh development
361: systems are provided.
362:
363: For Symantec C++/THINK C, you must build the two projects gclib-1.¹ and
364: gclib-2.¹. It has to be split up because the collector has more than 32k
365: of static data and no library can have more than this in the Symantec
366: environment. (Future versions will probably fix this.)
367:
368: For Metrowerks C/C++ 4.5 you build gc.68K.¹/gc.PPC.¹ and the result will
369: be a library called gc.68K.lib/gc.PPC.lib.
370:
371: Using
372: -----
373:
374: Under Symantec C++/THINK C, you can just add the gclib-1.¹ and gclib-2.¹
375: projects to your own project. Under Metrowerks, you add gc.68K.lib or
376: gc.PPC.lib and two additional files. You add the files called datastart.c
377: and dataend.c to your project, bracketing all files that use the collector.
378: See mw/gctest.¹ for an example.
379:
380: Include the projects/libraries you built above into your own project,
381: #include "gc.h", and call GC_malloc. You don't have to call GC_free.
382:
383:
384: Patrick C. Beard
385: January 4, 1995
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