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src/Source/LibJPEG/ckconfig.c  view on Meta::CPAN

 */

#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