+++ /dev/null
-/*
- * 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.doc 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;
-}
projects / reactos.git / blobdiff