4
* Copyright (C) 1991-1994, Thomas G. Lane.
5
* This file is part of the Independent JPEG Group's software.
6
* For conditions of distribution and use, see the accompanying README file.
10
* This program is intended to help you determine how to configure the JPEG
11
* software for installation on a particular system. The idea is to try to
12
* compile and execute this program. If your compiler fails to compile the
13
* program, make changes as indicated in the comments below. Once you can
14
* compile the program, run it, and it will produce a "jconfig.h" file for
17
* As a general rule, each time you try to compile this program,
18
* pay attention only to the *first* error message you get from the compiler.
19
* Many C compilers will issue lots of spurious error messages once they
20
* have gotten confused. Go to the line indicated in the first error message,
21
* and read the comments preceding that line to see what to change.
23
* Almost all of the edits you may need to make to this program consist of
24
* changing a line that reads "#define SOME_SYMBOL" to "#undef SOME_SYMBOL",
25
* or vice versa. This is called defining or undefining that symbol.
29
/* First we must see if your system has the include files we need.
30
* We start out with the assumption that your system has all the ANSI-standard
31
* include files. If you get any error trying to include one of these files,
32
* undefine the corresponding HAVE_xxx symbol.
35
#define HAVE_STDDEF_H /* replace 'define' by 'undef' if error here */
36
#ifdef HAVE_STDDEF_H /* next line will be skipped if you undef... */
40
#define HAVE_STDLIB_H /* same thing for stdlib.h */
45
#include <stdio.h> /* If you ain't got this, you ain't got C. */
47
/* We have to see if your string functions are defined by
48
* strings.h (old BSD convention) or string.h (everybody else).
49
* We try the non-BSD convention first; define NEED_BSD_STRINGS
50
* if the compiler says it can't find string.h.
53
#undef NEED_BSD_STRINGS
55
#ifdef NEED_BSD_STRINGS
61
/* On some systems (especially older Unix machines), type size_t is
62
* defined only in the include file <sys/types.h>. If you get a failure
63
* on the size_t test below, try defining NEED_SYS_TYPES_H.
66
#undef NEED_SYS_TYPES_H /* start by assuming we don't need it */
67
#ifdef NEED_SYS_TYPES_H
68
#include <sys/types.h>
72
/* Usually type size_t is defined in one of the include files we've included
73
* above. If not, you'll get an error on the "typedef size_t my_size_t;" line.
74
* In that case, first try defining NEED_SYS_TYPES_H just above.
75
* If that doesn't work, you'll have to search through your system library
76
* to figure out which include file defines "size_t". Look for a line that
77
* says "typedef something-or-other size_t;". Then, change the line below
78
* that says "#include <someincludefile.h>" to instead include the file
79
* you found size_t in, and define NEED_SPECIAL_INCLUDE. If you can't find
80
* type size_t anywhere, try replacing "#include <someincludefile.h>" with
81
* "typedef unsigned int size_t;".
84
#undef NEED_SPECIAL_INCLUDE /* assume we DON'T need it, for starters */
86
#ifdef NEED_SPECIAL_INCLUDE
87
#include <someincludefile.h>
90
typedef size_t my_size_t; /* The payoff: do we have size_t now? */
93
/* The next question is whether your compiler supports ANSI-style function
94
* prototypes. You need to know this in order to choose between using
95
* makefile.ansi and using makefile.unix.
96
* The #define line below is set to assume you have ANSI function prototypes.
97
* If you get an error in this group of lines, undefine HAVE_PROTOTYPES.
100
#define HAVE_PROTOTYPES
102
#ifdef HAVE_PROTOTYPES
103
int testfunction (int arg1, int * arg2); /* check prototypes */
105
struct methods_struct { /* check method-pointer declarations */
106
int (*error_exit) (char *msgtext);
107
int (*trace_message) (char *msgtext);
108
int (*another_method) (void);
111
int testfunction (int arg1, int * arg2) /* check definitions */
116
int test2function (void) /* check void arg list */
123
/* Now we want to find out if your compiler knows what "unsigned char" means.
124
* If you get an error on the "unsigned char un_char;" line,
125
* then undefine HAVE_UNSIGNED_CHAR.
128
#define HAVE_UNSIGNED_CHAR
130
#ifdef HAVE_UNSIGNED_CHAR
131
unsigned char un_char;
135
/* Now we want to find out if your compiler knows what "unsigned short" means.
136
* If you get an error on the "unsigned short un_short;" line,
137
* then undefine HAVE_UNSIGNED_SHORT.
140
#define HAVE_UNSIGNED_SHORT
142
#ifdef HAVE_UNSIGNED_SHORT
143
unsigned short un_short;
147
/* Now we want to find out if your compiler understands type "void".
148
* If you get an error anywhere in here, undefine HAVE_VOID.
154
/* Caution: a C++ compiler will insist on complete prototypes */
155
typedef void * void_ptr; /* check void * */
156
#ifdef HAVE_PROTOTYPES /* check ptr to function returning void */
157
typedef void (*void_func) (int a, int b);
159
typedef void (*void_func) ();
162
#ifdef HAVE_PROTOTYPES /* check void function result */
163
void test3function (void_ptr arg1, void_func arg2)
165
void test3function (arg1, arg2)
170
char * locptr = (char *) arg1; /* check casting to and from void * */
171
arg1 = (void *) locptr;
172
(*arg2) (1, 2); /* check call of fcn returning void */
177
/* Now we want to find out if your compiler knows what "const" means.
178
* If you get an error here, undefine HAVE_CONST.
184
static const int carray[3] = {1, 2, 3};
186
#ifdef HAVE_PROTOTYPES
187
int test4function (const int arg1)
189
int test4function (arg1)
198
/* If you get an error or warning about this structure definition,
199
* define INCOMPLETE_TYPES_BROKEN.
202
#undef INCOMPLETE_TYPES_BROKEN
204
#ifndef INCOMPLETE_TYPES_BROKEN
205
typedef struct undefined_structure * undef_struct_ptr;
209
/* If you get an error about duplicate names,
210
* define NEED_SHORT_EXTERNAL_NAMES.
213
#undef NEED_SHORT_EXTERNAL_NAMES
215
#ifndef NEED_SHORT_EXTERNAL_NAMES
217
int possibly_duplicate_function ()
222
int possibly_dupli_function ()
231
/************************************************************************
232
* OK, that's it. You should not have to change anything beyond this
233
* point in order to compile and execute this program. (You might get
234
* some warnings, but you can ignore them.)
235
* When you run the program, it will make a couple more tests that it
236
* can do automatically, and then it will create jconfig.h and print out
237
* any additional suggestions it has.
238
************************************************************************
242
#ifdef HAVE_PROTOTYPES
243
int is_char_signed (int arg)
245
int is_char_signed (arg)
249
if (arg == 189) { /* expected result for unsigned char */
250
return 0; /* type char is unsigned */
252
else if (arg != -67) { /* expected result for signed char */
253
printf("Hmm, it seems 'char' is not eight bits wide on your machine.\n");
254
printf("I fear the JPEG software will not work at all.\n\n");
256
return 1; /* assume char is signed otherwise */
260
#ifdef HAVE_PROTOTYPES
261
int is_shifting_signed (long arg)
263
int is_shifting_signed (arg)
266
/* See whether right-shift on a long is signed or not. */
270
if (res == -0x7F7E80CL) { /* expected result for signed shift */
271
return 1; /* right shift is signed */
273
/* see if unsigned-shift hack will fix it. */
274
/* we can't just test exact value since it depends on width of long... */
275
res |= (~0L) << (32-4);
276
if (res == -0x7F7E80CL) { /* expected result now? */
277
return 0; /* right shift is unsigned */
279
printf("Right shift isn't acting as I expect it to.\n");
280
printf("I fear the JPEG software will not work at all.\n\n");
281
return 0; /* try it with unsigned anyway */
285
#ifdef HAVE_PROTOTYPES
286
int main (int argc, char ** argv)
288
int main (argc, argv)
293
char signed_char_check = (char) (-67);
296
/* Attempt to write jconfig.h */
297
if ((outfile = fopen("jconfig.h", "w")) == NULL) {
298
printf("Failed to write jconfig.h\n");
302
/* Write out all the info */
303
fprintf(outfile, "/* jconfig.h --- generated by ckconfig.c */\n");
304
fprintf(outfile, "/* see jconfig.txt for explanations */\n\n");
305
#ifdef HAVE_PROTOTYPES
306
fprintf(outfile, "#define HAVE_PROTOTYPES\n");
308
fprintf(outfile, "#undef HAVE_PROTOTYPES\n");
310
#ifdef HAVE_UNSIGNED_CHAR
311
fprintf(outfile, "#define HAVE_UNSIGNED_CHAR\n");
313
fprintf(outfile, "#undef HAVE_UNSIGNED_CHAR\n");
315
#ifdef HAVE_UNSIGNED_SHORT
316
fprintf(outfile, "#define HAVE_UNSIGNED_SHORT\n");
318
fprintf(outfile, "#undef HAVE_UNSIGNED_SHORT\n");
321
fprintf(outfile, "/* #define void char */\n");
323
fprintf(outfile, "#define void char\n");
326
fprintf(outfile, "/* #define const */\n");
328
fprintf(outfile, "#define const\n");
330
if (is_char_signed((int) signed_char_check))
331
fprintf(outfile, "#undef CHAR_IS_UNSIGNED\n");
333
fprintf(outfile, "#define CHAR_IS_UNSIGNED\n");
335
fprintf(outfile, "#define HAVE_STDDEF_H\n");
337
fprintf(outfile, "#undef HAVE_STDDEF_H\n");
340
fprintf(outfile, "#define HAVE_STDLIB_H\n");
342
fprintf(outfile, "#undef HAVE_STDLIB_H\n");
344
#ifdef NEED_BSD_STRINGS
345
fprintf(outfile, "#define NEED_BSD_STRINGS\n");
347
fprintf(outfile, "#undef NEED_BSD_STRINGS\n");
349
#ifdef NEED_SYS_TYPES_H
350
fprintf(outfile, "#define NEED_SYS_TYPES_H\n");
352
fprintf(outfile, "#undef NEED_SYS_TYPES_H\n");
354
fprintf(outfile, "#undef NEED_FAR_POINTERS\n");
355
#ifdef NEED_SHORT_EXTERNAL_NAMES
356
fprintf(outfile, "#define NEED_SHORT_EXTERNAL_NAMES\n");
358
fprintf(outfile, "#undef NEED_SHORT_EXTERNAL_NAMES\n");
360
#ifdef INCOMPLETE_TYPES_BROKEN
361
fprintf(outfile, "#define INCOMPLETE_TYPES_BROKEN\n");
363
fprintf(outfile, "#undef INCOMPLETE_TYPES_BROKEN\n");
365
fprintf(outfile, "\n#ifdef JPEG_INTERNALS\n\n");
366
if (is_shifting_signed(-0x7F7E80B1L))
367
fprintf(outfile, "#undef RIGHT_SHIFT_IS_UNSIGNED\n");
369
fprintf(outfile, "#define RIGHT_SHIFT_IS_UNSIGNED\n");
370
fprintf(outfile, "\n#endif /* JPEG_INTERNALS */\n");
371
fprintf(outfile, "\n#ifdef JPEG_CJPEG_DJPEG\n\n");
372
fprintf(outfile, "#define BMP_SUPPORTED /* BMP image file format */\n");
373
fprintf(outfile, "#define GIF_SUPPORTED /* GIF image file format */\n");
374
fprintf(outfile, "#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */\n");
375
fprintf(outfile, "#undef RLE_SUPPORTED /* Utah RLE image file format */\n");
376
fprintf(outfile, "#define TARGA_SUPPORTED /* Targa image file format */\n\n");
377
fprintf(outfile, "#undef TWO_FILE_COMMANDLINE /* You may need this on non-Unix systems */\n");
378
fprintf(outfile, "#undef NEED_SIGNAL_CATCHER /* Define this if you use jmemname.c */\n");
379
fprintf(outfile, "#undef DONT_USE_B_MODE\n");
380
fprintf(outfile, "/* #define PROGRESS_REPORT */ /* optional */\n");
381
fprintf(outfile, "\n#endif /* JPEG_CJPEG_DJPEG */\n");
383
/* Close the jconfig.h file */
387
printf("Configuration check for Independent JPEG Group's software done.\n");
388
printf("\nI have written the jconfig.h file for you.\n\n");
389
#ifdef HAVE_PROTOTYPES
390
printf("You should use makefile.ansi as the starting point for your Makefile.\n");
392
printf("You should use makefile.unix as the starting point for your Makefile.\n");
395
#ifdef NEED_SPECIAL_INCLUDE
396
printf("\nYou'll need to change jconfig.h to include the system include file\n");
397
printf("that you found type size_t in, or add a direct definition of type\n");
398
printf("size_t if that's what you used. Just add it to the end.\n");
added
removed
source/Irrlicht/jpeglib/ckconfig.c
