403 lines
12 KiB
C
403 lines
12 KiB
C
|
/*
|
||
|
|
* ckconfig.c
|
||
|
|
*
|
||
|
|
* Copyright (C) 1991-1994, Thomas G. Lane.
|
||
|
|
* This file is part of the Independent JPEG Group's software.
|
||
|
|
* For conditions of distribution and use, see the accompanying README file.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This program is intended to help you determine how to configure the JPEG
|
||
|
|
* software for installation on a particular system. The idea is to try to
|
||
|
|
* compile and execute this program. If your compiler fails to compile the
|
||
|
|
* program, make changes as indicated in the comments below. Once you can
|
||
|
|
* compile the program, run it, and it will produce a "jconfig.h" file for
|
||
|
|
* your system.
|
||
|
|
*
|
||
|
|
* As a general rule, each time you try to compile this program,
|
||
|
|
* pay attention only to the *first* error message you get from the compiler.
|
||
|
|
* Many C compilers will issue lots of spurious error messages once they
|
||
|
|
* have gotten confused. Go to the line indicated in the first error message,
|
||
|
|
* and read the comments preceding that line to see what to change.
|
||
|
|
*
|
||
|
|
* Almost all of the edits you may need to make to this program consist of
|
||
|
|
* changing a line that reads "#define SOME_SYMBOL" to "#undef SOME_SYMBOL",
|
||
|
|
* or vice versa. This is called defining or undefining that symbol.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/* First we must see if your system has the include files we need.
|
||
|
|
* We start out with the assumption that your system has all the ANSI-standard
|
||
|
|
* include files. If you get any error trying to include one of these files,
|
||
|
|
* undefine the corresponding HAVE_xxx symbol.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define HAVE_STDDEF_H /* replace 'define' by 'undef' if error here */
|
||
|
|
#ifdef HAVE_STDDEF_H /* next line will be skipped if you undef... */
|
||
|
|
#include <stddef.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define HAVE_STDLIB_H /* same thing for stdlib.h */
|
||
|
|
#ifdef HAVE_STDLIB_H
|
||
|
|
#include <stdlib.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <stdio.h> /* If you ain't got this, you ain't got C. */
|
||
|
|
|
||
|
|
/* We have to see if your string functions are defined by
|
||
|
|
* strings.h (old BSD convention) or string.h (everybody else).
|
||
|
|
* We try the non-BSD convention first; define NEED_BSD_STRINGS
|
||
|
|
* if the compiler says it can't find string.h.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#undef NEED_BSD_STRINGS
|
||
|
|
|
||
|
|
#ifdef NEED_BSD_STRINGS
|
||
|
|
#include <strings.h>
|
||
|
|
#else
|
||
|
|
#include <string.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* On some systems (especially older Unix machines), type size_t is
|
||
|
|
* defined only in the include file <sys/types.h>. If you get a failure
|
||
|
|
* on the size_t test below, try defining NEED_SYS_TYPES_H.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#undef NEED_SYS_TYPES_H /* start by assuming we don't need it */
|
||
|
|
#ifdef NEED_SYS_TYPES_H
|
||
|
|
#include <sys/types.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* Usually type size_t is defined in one of the include files we've included
|
||
|
|
* above. If not, you'll get an error on the "typedef size_t my_size_t;" line.
|
||
|
|
* In that case, first try defining NEED_SYS_TYPES_H just above.
|
||
|
|
* If that doesn't work, you'll have to search through your system library
|
||
|
|
* to figure out which include file defines "size_t". Look for a line that
|
||
|
|
* says "typedef something-or-other size_t;". Then, change the line below
|
||
|
|
* that says "#include <someincludefile.h>" to instead include the file
|
||
|
|
* you found size_t in, and define NEED_SPECIAL_INCLUDE. If you can't find
|
||
|
|
* type size_t anywhere, try replacing "#include <someincludefile.h>" with
|
||
|
|
* "typedef unsigned int size_t;".
|
||
|
|
*/
|
||
|
|
|
||
|
|
#undef NEED_SPECIAL_INCLUDE /* assume we DON'T need it, for starters */
|
||
|
|
|
||
|
|
#ifdef NEED_SPECIAL_INCLUDE
|
||
|
|
#include <someincludefile.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
typedef size_t my_size_t; /* The payoff: do we have size_t now? */
|
||
|
|
|
||
|
|
|
||
|
|
/* The next question is whether your compiler supports ANSI-style function
|
||
|
|
* prototypes. You need to know this in order to choose between using
|
||
|
|
* makefile.ansi and using makefile.unix.
|
||
|
|
* The #define line below is set to assume you have ANSI function prototypes.
|
||
|
|
* If you get an error in this group of lines, undefine HAVE_PROTOTYPES.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define HAVE_PROTOTYPES
|
||
|
|
|
||
|
|
#ifdef HAVE_PROTOTYPES
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* Now we want to find out if your compiler knows what "unsigned char" means.
|
||
|
|
* If you get an error on the "unsigned char un_char;" line,
|
||
|
|
* then undefine HAVE_UNSIGNED_CHAR.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define HAVE_UNSIGNED_CHAR
|
||
|
|
|
||
|
|
#ifdef HAVE_UNSIGNED_CHAR
|
||
|
|
unsigned char un_char;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* Now we want to find out if your compiler knows what "unsigned short" means.
|
||
|
|
* If you get an error on the "unsigned short un_short;" line,
|
||
|
|
* then undefine HAVE_UNSIGNED_SHORT.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define HAVE_UNSIGNED_SHORT
|
||
|
|
|
||
|
|
#ifdef HAVE_UNSIGNED_SHORT
|
||
|
|
unsigned short un_short;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* Now we want to find out if your compiler understands type "void".
|
||
|
|
* If you get an error anywhere in here, undefine HAVE_VOID.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define HAVE_VOID
|
||
|
|
|
||
|
|
#ifdef HAVE_VOID
|
||
|
|
/* Caution: a C++ compiler will insist on complete 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 */
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* Now we want to find out if your compiler knows what "const" means.
|
||
|
|
* If you get an error here, undefine HAVE_CONST.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define HAVE_CONST
|
||
|
|
|
||
|
|
#ifdef HAVE_CONST
|
||
|
|
static const int carray[3] = {1, 2, 3};
|
||
|
|
|
||
|
|
#ifdef HAVE_PROTOTYPES
|
||
|
|
int test4function (const int arg1)
|
||
|
|
#else
|
||
|
|
int test4function (arg1)
|
||
|
|
const int arg1;
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
return carray[arg1];
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* If you get an error or warning about this structure definition,
|
||
|
|
* define INCOMPLETE_TYPES_BROKEN.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#undef INCOMPLETE_TYPES_BROKEN
|
||
|
|
|
||
|
|
#ifndef INCOMPLETE_TYPES_BROKEN
|
||
|
|
typedef struct undefined_structure * undef_struct_ptr;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/* If you get an error about duplicate names,
|
||
|
|
* define NEED_SHORT_EXTERNAL_NAMES.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#undef NEED_SHORT_EXTERNAL_NAMES
|
||
|
|
|
||
|
|
#ifndef NEED_SHORT_EXTERNAL_NAMES
|
||
|
|
|
||
|
|
int possibly_duplicate_function ()
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int possibly_dupli_function ()
|
||
|
|
{
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/************************************************************************
|
||
|
|
* OK, that's it. You should not have to change anything beyond this
|
||
|
|
* point in order to compile and execute this program. (You might get
|
||
|
|
* some warnings, but you can ignore them.)
|
||
|
|
* When you run the program, it will make a couple more tests that it
|
||
|
|
* can do automatically, and then it will create jconfig.h and print out
|
||
|
|
* any additional suggestions it has.
|
||
|
|
************************************************************************
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#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 */
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#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 */
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef HAVE_PROTOTYPES
|
||
|
|
int main (int argc, char ** argv)
|
||
|
|
#else
|
||
|
|
int main (argc, argv)
|
||
|
|
int argc;
|
||
|
|
char ** argv;
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
char signed_char_check = (char) (-67);
|
||
|
|
FILE *outfile;
|
||
|
|
|
||
|
|
/* Attempt to write jconfig.h */
|
||
|
|
if ((outfile = fopen("jconfig.h", "w")) == NULL) {
|
||
|
|
printf("Failed to write jconfig.h\n");
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Write out all the info */
|
||
|
|
fprintf(outfile, "/* jconfig.h --- generated by ckconfig.c */\n");
|
||
|
|
fprintf(outfile, "/* see jconfig.txt for explanations */\n\n");
|
||
|
|
#ifdef HAVE_PROTOTYPES
|
||
|
|
fprintf(outfile, "#define HAVE_PROTOTYPES\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#undef HAVE_PROTOTYPES\n");
|
||
|
|
#endif
|
||
|
|
#ifdef HAVE_UNSIGNED_CHAR
|
||
|
|
fprintf(outfile, "#define HAVE_UNSIGNED_CHAR\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#undef HAVE_UNSIGNED_CHAR\n");
|
||
|
|
#endif
|
||
|
|
#ifdef HAVE_UNSIGNED_SHORT
|
||
|
|
fprintf(outfile, "#define HAVE_UNSIGNED_SHORT\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#undef HAVE_UNSIGNED_SHORT\n");
|
||
|
|
#endif
|
||
|
|
#ifdef HAVE_VOID
|
||
|
|
fprintf(outfile, "/* #define void char */\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#define void char\n");
|
||
|
|
#endif
|
||
|
|
#ifdef HAVE_CONST
|
||
|
|
fprintf(outfile, "/* #define const */\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#define const\n");
|
||
|
|
#endif
|
||
|
|
if (is_char_signed((int) signed_char_check))
|
||
|
|
fprintf(outfile, "#undef CHAR_IS_UNSIGNED\n");
|
||
|
|
else
|
||
|
|
fprintf(outfile, "#define CHAR_IS_UNSIGNED\n");
|
||
|
|
#ifdef HAVE_STDDEF_H
|
||
|
|
fprintf(outfile, "#define HAVE_STDDEF_H\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#undef HAVE_STDDEF_H\n");
|
||
|
|
#endif
|
||
|
|
#ifdef HAVE_STDLIB_H
|
||
|
|
fprintf(outfile, "#define HAVE_STDLIB_H\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#undef HAVE_STDLIB_H\n");
|
||
|
|
#endif
|
||
|
|
#ifdef NEED_BSD_STRINGS
|
||
|
|
fprintf(outfile, "#define NEED_BSD_STRINGS\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#undef NEED_BSD_STRINGS\n");
|
||
|
|
#endif
|
||
|
|
#ifdef NEED_SYS_TYPES_H
|
||
|
|
fprintf(outfile, "#define NEED_SYS_TYPES_H\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#undef NEED_SYS_TYPES_H\n");
|
||
|
|
#endif
|
||
|
|
fprintf(outfile, "#undef NEED_FAR_POINTERS\n");
|
||
|
|
#ifdef NEED_SHORT_EXTERNAL_NAMES
|
||
|
|
fprintf(outfile, "#define NEED_SHORT_EXTERNAL_NAMES\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#undef NEED_SHORT_EXTERNAL_NAMES\n");
|
||
|
|
#endif
|
||
|
|
#ifdef INCOMPLETE_TYPES_BROKEN
|
||
|
|
fprintf(outfile, "#define INCOMPLETE_TYPES_BROKEN\n");
|
||
|
|
#else
|
||
|
|
fprintf(outfile, "#undef INCOMPLETE_TYPES_BROKEN\n");
|
||
|
|
#endif
|
||
|
|
fprintf(outfile, "\n#ifdef JPEG_INTERNALS\n\n");
|
||
|
|
if (is_shifting_signed(-0x7F7E80B1L))
|
||
|
|
fprintf(outfile, "#undef RIGHT_SHIFT_IS_UNSIGNED\n");
|
||
|
|
else
|
||
|
|
fprintf(outfile, "#define RIGHT_SHIFT_IS_UNSIGNED\n");
|
||
|
|
fprintf(outfile, "\n#endif /* JPEG_INTERNALS */\n");
|
||
|
|
fprintf(outfile, "\n#ifdef JPEG_CJPEG_DJPEG\n\n");
|
||
|
|
fprintf(outfile, "#define BMP_SUPPORTED /* BMP image file format */\n");
|
||
|
|
fprintf(outfile, "#define GIF_SUPPORTED /* GIF image file format */\n");
|
||
|
|
fprintf(outfile, "#define PPM_SUPPORTED /* PBMPLUS PPM/PGM image file format */\n");
|
||
|
|
fprintf(outfile, "#undef RLE_SUPPORTED /* Utah RLE image file format */\n");
|
||
|
|
fprintf(outfile, "#define TARGA_SUPPORTED /* Targa image file format */\n\n");
|
||
|
|
fprintf(outfile, "#undef TWO_FILE_COMMANDLINE /* You may need this on non-Unix systems */\n");
|
||
|
|
fprintf(outfile, "#undef NEED_SIGNAL_CATCHER /* Define this if you use jmemname.c */\n");
|
||
|
|
fprintf(outfile, "#undef DONT_USE_B_MODE\n");
|
||
|
|
fprintf(outfile, "/* #define PROGRESS_REPORT */ /* optional */\n");
|
||
|
|
fprintf(outfile, "\n#endif /* JPEG_CJPEG_DJPEG */\n");
|
||
|
|
|
||
|
|
/* Close the jconfig.h file */
|
||
|
|
fclose(outfile);
|
||
|
|
|
||
|
|
/* User report */
|
||
|
|
printf("Configuration check for Independent JPEG Group's software done.\n");
|
||
|
|
printf("\nI have written the jconfig.h file for you.\n\n");
|
||
|
|
#ifdef HAVE_PROTOTYPES
|
||
|
|
printf("You should use makefile.ansi as the starting point for your Makefile.\n");
|
||
|
|
#else
|
||
|
|
printf("You should use makefile.unix as the starting point for your Makefile.\n");
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef NEED_SPECIAL_INCLUDE
|
||
|
|
printf("\nYou'll need to change jconfig.h to include the system include file\n");
|
||
|
|
printf("that you found type size_t in, or add a direct definition of type\n");
|
||
|
|
printf("size_t if that's what you used. Just add it to the end.\n");
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|