aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/configure.ac
blob: 12293b01c37b95b587ada0ca852c1df5f64de319 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
# IJG auto-configuration source file.
# Process this file with autoconf to produce a configure script.

#
# Configure script for IJG libjpeg
#

AC_INIT([libjpeg], [8.4.0])

# Directory where autotools helper scripts lives.
AC_CONFIG_AUX_DIR([.])

# Generate configuration headers.
AC_CONFIG_HEADERS([jconfig.h:jconfig.cfg])

# Hack: disable autoheader so that it doesn't overwrite our cfg template.
AUTOHEADER="echo autoheader ignored"

# Check system type
AC_CANONICAL_TARGET

# Initialize Automake
# Don't require all the GNU mandated files
AM_INIT_AUTOMAKE([-Wall -Werror -Wno-obsolete ansi2knr no-dist foreign])

# Make --enable-silent-rules the default.
# To get verbose build output you may configure
# with --disable-silent-rules or use "make V=1".
AM_SILENT_RULES([yes])

# This is required when using the de-ANSI-fication feature.
AM_C_PROTOTYPES

# Add configure option --enable-maintainer-mode which enables
# dependency checking and generation useful to package maintainers.
# This is made an option to avoid confusing end users.
AM_MAINTAINER_MODE

# Check for programs
AC_PROG_CC
AC_PROG_CC_STDC
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_LN_S

# Check if LD supports linker scripts,
# and define automake conditional HAVE_LD_VERSION_SCRIPT if so.
AC_ARG_ENABLE([ld-version-script],
  AS_HELP_STRING([--enable-ld-version-script],
    [enable linker version script (default is enabled when possible)]),
    [have_ld_version_script=$enableval], [])
if test -z "$have_ld_version_script"; then
  AC_MSG_CHECKING([if LD -Wl,--version-script works])
  save_LDFLAGS="$LDFLAGS"
  LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map"
  cat > conftest.map <<EOF
VERS_1 {
        global: sym;
};

VERS_2 {
        global: sym;
} VERS_1;
EOF
  AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])],
                 [have_ld_version_script=yes], [have_ld_version_script=no])
  rm -f conftest.map
  LDFLAGS="$save_LDFLAGS"
  AC_MSG_RESULT($have_ld_version_script)
fi
AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")

# See if compiler supports prototypes.
AC_MSG_CHECKING([for function prototypes])
AC_CACHE_VAL([ijg_cv_have_prototypes],
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
int testfunction (int arg1, int * arg2); /* check prototypes */
struct methods_struct {		/* check method-pointer declarations */
  int (*error_exit) (char *msgtext);
  int (*trace_message) (char *msgtext);
  int (*another_method) (void);
};
int testfunction (int arg1, int * arg2) /* check definitions */
{ return arg2[arg1]; }
int test2function (void)	/* check void arg list */
{ return 0; }
]])],
          [ijg_cv_have_prototypes=yes],
          [ijg_cv_have_prototypes=no])])
AC_MSG_RESULT([$ijg_cv_have_prototypes])
if test $ijg_cv_have_prototypes = yes; then
  AC_DEFINE([HAVE_PROTOTYPES],[1],[Compiler supports function prototypes.])
else
  AC_MSG_WARN([Your compiler does not seem to know about function prototypes.
    Perhaps it needs a special switch to enable ANSI C mode.
    If so, we recommend running configure like this:
       ./configure  CC='cc -switch'
    where -switch is the proper switch.])
fi

# Check header files
AC_CHECK_HEADERS([stddef.h stdlib.h locale.h])
AC_CHECK_HEADER([string.h], [],
 [AC_DEFINE([NEED_BSD_STRINGS], [1],
            [Compiler has <strings.h> rather than standard <string.h>.])])

# See whether type size_t is defined in any ANSI-standard places;
# if not, perhaps it is defined in <sys/types.h>.
AC_MSG_CHECKING([for size_t])
AC_TRY_COMPILE([
#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <stdio.h>
#ifdef NEED_BSD_STRINGS
#include <strings.h>
#else
#include <string.h>
#endif
typedef size_t my_size_t;
],
      [ my_size_t foovar; ],
      [ijg_size_t_ok=yes],
      [ijg_size_t_ok="not ANSI, perhaps it is in sys/types.h"])
AC_MSG_RESULT([$ijg_size_t_ok])
if test "$ijg_size_t_ok" != yes; then
  AC_CHECK_HEADER([sys/types.h],
     [AC_DEFINE([NEED_SYS_TYPES_H], [1],
                [Need to include <sys/types.h> in order to obtain size_t.])
      AC_EGREP_CPP([size_t], [#include <sys/types.h>],
                   [ijg_size_t_ok="size_t is in sys/types.h"],
                   [ijg_size_t_ok=no])],
     [ijg_size_t_ok=no])
  AC_MSG_RESULT([$ijg_size_t_ok])
  if test "$ijg_size_t_ok" = no; then
    AC_MSG_WARN([Type size_t is not defined in any of the usual places.
      Try putting '"typedef unsigned int size_t;"' in jconfig.h.])
  fi
fi

# Check compiler characteristics
AC_MSG_CHECKING([for type unsigned char])
AC_TRY_COMPILE([], [ unsigned char un_char; ],
 [AC_MSG_RESULT(yes)
  AC_DEFINE([HAVE_UNSIGNED_CHAR], [1],
            [Compiler supports 'unsigned char'.])],
 [AC_MSG_RESULT(no)])

AC_MSG_CHECKING([for type unsigned short])
AC_TRY_COMPILE([], [ unsigned short un_short; ],
  [AC_MSG_RESULT(yes)
   AC_DEFINE([HAVE_UNSIGNED_SHORT], [1],
             [Compiler supports 'unsigned short'.])],
  [AC_MSG_RESULT(no)])

AC_MSG_CHECKING([for type void])
AC_TRY_COMPILE([
/* Caution: a C++ compiler will insist on valid prototypes */
typedef void * void_ptr;	/* check void * */
#ifdef HAVE_PROTOTYPES		/* check ptr to function returning void */
typedef void (*void_func) (int a, int b);
#else
typedef void (*void_func) ();
#endif

#ifdef HAVE_PROTOTYPES		/* check void function result */
void test3function (void_ptr arg1, void_func arg2)
#else
void test3function (arg1, arg2)
     void_ptr arg1;
     void_func arg2;
#endif
{
  char * locptr = (char *) arg1; /* check casting to and from void * */
  arg1 = (void *) locptr;
  (*arg2) (1, 2);		/* check call of fcn returning void */
}
], [ ],
        [AC_MSG_RESULT(yes)],
        [AC_MSG_RESULT(no)
         AC_DEFINE([void], [char],
                   [Define 'void' as 'char' for archaic compilers
                    that don't understand it.])])
AC_C_CONST

# Check for non-broken inline under various spellings
AC_MSG_CHECKING([for inline])
ijg_cv_inline=""
AC_TRY_COMPILE([], [} __inline__ int foo() { return 0; }
int bar() { return foo();], ijg_cv_inline="__inline__",
[AC_TRY_COMPILE(, [} __inline int foo() { return 0; }
int bar() { return foo();], ijg_cv_inline="__inline",
[AC_TRY_COMPILE(, [} inline int foo() { return 0; }
int bar() { return foo();], ijg_cv_inline="inline")])])
AC_MSG_RESULT($ijg_cv_inline)
AC_DEFINE_UNQUOTED([INLINE], [$ijg_cv_inline],
                   [How to obtain function inlining.])

# We cannot check for bogus warnings, but at least we can check for errors
AC_MSG_CHECKING([for broken incomplete types])
AC_TRY_COMPILE([ typedef struct undefined_structure * undef_struct_ptr; ],
               [],
               [AC_MSG_RESULT(ok)],
               [AC_MSG_RESULT(broken)
                AC_DEFINE([INCOMPLETE_TYPES_BROKEN], [1],
                          [Compiler does not support pointers to unspecified
                           structures.])])

# Test whether global names are unique to at least 15 chars
AC_MSG_CHECKING([for short external names])
AC_TRY_LINK([
int possibly_duplicate_function () { return 0; }
int possibly_dupli_function () { return 1; }
], [],
            [AC_MSG_RESULT(ok)],
            [AC_MSG_RESULT(short)
             AC_DEFINE([NEED_SHORT_EXTERNAL_NAMES], [1],
                       [Linker requires that global names be unique in
                        first 15 characters.])])

# Run-time checks
AC_MSG_CHECKING([to see if char is signed])
AC_TRY_RUN([
#ifdef HAVE_PROTOTYPES
int is_char_signed (int arg)
#else
int is_char_signed (arg)
     int arg;
#endif
{
  if (arg == 189) {		/* expected result for unsigned char */
    return 0;			/* type char is unsigned */
  }
  else if (arg != -67) {	/* expected result for signed char */
    printf("Hmm, it seems 'char' is not eight bits wide on your machine.\n");
    printf("I fear the JPEG software will not work at all.\n\n");
  }
  return 1;			/* assume char is signed otherwise */
}
char signed_char_check = (char) (-67);
int main() {
  exit(is_char_signed((int) signed_char_check));
}], [AC_MSG_RESULT(no)
     AC_DEFINE([CHAR_IS_UNSIGNED], [1],
               [Characters are unsigned])],
               [AC_MSG_RESULT(yes)],
[AC_MSG_WARN([Assuming that char is signed on target machine.
    If it is unsigned, this will be a little bit inefficient.])
])

AC_MSG_CHECKING([to see if right shift is signed])
AC_TRY_RUN([
#ifdef HAVE_PROTOTYPES
int is_shifting_signed (long arg)
#else
int is_shifting_signed (arg)
     long arg;
#endif
/* See whether right-shift on a long is signed or not. */
{
  long res = arg >> 4;

  if (res == -0x7F7E80CL) {	/* expected result for signed shift */
    return 1;			/* right shift is signed */
  }
  /* see if unsigned-shift hack will fix it. */
  /* we can't just test exact value since it depends on width of long... */
  res |= (~0L) << (32-4);
  if (res == -0x7F7E80CL) {	/* expected result now? */
    return 0;			/* right shift is unsigned */
  }
  printf("Right shift isn't acting as I expect it to.\n");
  printf("I fear the JPEG software will not work at all.\n\n");
  return 0;			/* try it with unsigned anyway */
}
int main() {
  exit(is_shifting_signed(-0x7F7E80B1L));
}],
      [AC_MSG_RESULT(no)
       AC_DEFINE([RIGHT_SHIFT_IS_UNSIGNED], [1],
                 [Broken compiler shifts signed values as an unsigned shift.])],
       [AC_MSG_RESULT(yes)],
       [AC_MSG_RESULT(Assuming that right shift is signed on target machine.)])

AC_MSG_CHECKING([to see if fopen accepts b spec])
AC_TRY_RUN([
#include <stdio.h>
int main() {
  if (fopen("conftestdata", "wb") != NULL)
    exit(0);
  exit(1);
}],
          [AC_MSG_RESULT(yes)],
          [AC_MSG_RESULT(no)
           AC_DEFINE([DONT_USE_B_MODE], [1],
                     [Don't open files in binary mode.])],
          [AC_MSG_RESULT(Assuming that it does.)])

# Configure libtool
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL

# Select memory manager depending on user input.
# If no "-enable-maxmem", use jmemnobs
MEMORYMGR='jmemnobs'
MAXMEM="no"
AC_ARG_ENABLE([maxmem],
[  --enable-maxmem[=N]     enable use of temp files, set max mem usage to N MB],
[MAXMEM="$enableval"])
dnl [# support --with-maxmem for backwards compatibility with IJG V5.]
dnl AC_ARG_WITH(maxmem, , MAXMEM="$withval")
if test "x$MAXMEM" = xyes; then
  MAXMEM=1
fi
if test "x$MAXMEM" != xno; then
  if test -n "`echo $MAXMEM | sed 's/[[0-9]]//g'`"; then
    AC_MSG_ERROR(non-numeric argument to --enable-maxmem)
  fi
  DEFAULTMAXMEM=`expr $MAXMEM \* 1048576`
  AC_DEFINE_UNQUOTED([DEFAULT_MAX_MEM], [${DEFAULTMAXMEM}],
                     [Maximum data space library will allocate.])
  AC_MSG_CHECKING([for 'tmpfile()'])
  AC_TRY_LINK([#include <stdio.h>], [ FILE * tfile = tmpfile(); ],
    [AC_MSG_RESULT(yes)
    MEMORYMGR='jmemansi'],
    [AC_MSG_RESULT(no)
    dnl if tmpfile is not present, must use jmemname.
    MEMORYMGR='jmemname'

    # Test for the need to remove temporary files using a signal handler
    # (for cjpeg/djpeg)
    AC_DEFINE([NEED_SIGNAL_CATCHER], [1],
              [Need signal handler to clean up temporary files.])
    AC_MSG_CHECKING([for 'mktemp()'])
    AC_TRY_LINK([], [ char fname[80]; mktemp(fname); ],
                [AC_MSG_RESULT(yes)],
                [AC_MSG_RESULT(no)
                 AC_DEFINE([NO_MKTEMP], [1],
                           [The mktemp() function is not available.])])])
fi
AC_SUBST([MEMORYMGR])

# Extract the library version IDs from jpeglib.h.
AC_MSG_CHECKING([libjpeg version number])
[major=`sed -ne 's/^#define JPEG_LIB_VERSION_MAJOR *\([0-9][0-9]*\).*$/\1/p' $srcdir/jpeglib.h`
minor=`sed -ne 's/^#define JPEG_LIB_VERSION_MINOR *\([0-9][0-9]*\).*$/\1/p' $srcdir/jpeglib.h`]
AC_SUBST([JPEG_LIB_VERSION],
         [`expr $major + $minor`:0:$minor])
AC_MSG_RESULT([$JPEG_LIB_VERSION])

AC_CONFIG_FILES([Makefile])
AC_OUTPUT