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Annotation of dietlibc/dietfeatures.h, revision 1.51

1.4       fefe        1: #ifndef _DIETFEATURES_H
                      2: #define _DIETFEATURES_H
1.1       cvs         3: 
                      4: /* feel free to comment some of these out to reduce code size */
                      5: 
1.13      fefe        6: #define WANT_FLOATING_POINT_IN_PRINTF
                      7: #define WANT_FLOATING_POINT_IN_SCANF
1.12      fefe        8: #define WANT_CHARACTER_CLASSES_IN_SCANF
1.1       cvs         9: #define WANT_NULL_PRINTF
1.51    ! leitner    10: #define WANT_ERROR_PRINTF
1.24      fefe       11: #define WANT_LONGLONG_PRINTF
1.42      olaf       12: #define WANT_LONGLONG_SCANF
1.1       cvs        13: 
1.20      fefe       14: /* 128 or 2048 bytes buffer size? */
                     15: /* #define WANT_SMALL_STDIO_BUFS */
                     16: 
1.40      fefe       17: /* want fread to read() directly if size of data is larger than buffer?
                     18:  * This costs a few bytes but is worth it if the application is already
                     19:  * buffering. */
                     20: #define WANT_FREAD_OPTIMIZATION
                     21: 
1.34      fefe       22: /* this is only for meaningful for ttyname and sysconf_cpus so far */
1.40      fefe       23: #define SLASH_PROC_OK
1.1       cvs        24: 
                     25: /* use errno_location instead of errno */
1.20      fefe       26: #define WANT_THREAD_SAFE
1.1       cvs        27: 
1.35      olaf       28: /* make the startcode, etc. dynamic aware ({con,de}structors) */
1.38      olaf       29: /* #define WANT_DYNAMIC */
1.1       cvs        30: 
                     31: /* do you want smaller or faster string routines? */
1.2       fefe       32: /* #define WANT_FASTER_STRING_ROUTINES */
1.1       cvs        33: 
1.43      fefe       34: /* define this to have strncpy zero-fill and not just zero-terminate the
                     35:  * string */
                     36: /* #define WANT_FULL_POSIX_COMPAT */
                     37: 
1.16      fefe       38: /* read the comment in lib/strncat.c for an explanation */
1.17      fefe       39: /* #define WANT_NON_COMPLIANT_STRNCAT */
1.16      fefe       40: 
1.47      leitner    41: /* on i386, Linux has an alternate syscall method since 2002/12/16 */
                     42: /* on my Athlon XP, it is twice as fast, but it's only in kernel 2.5 */
1.48      leitner    43: #define WANT_SYSENTER
1.47      leitner    44: 
1.4       fefe       45: #define WANT_LINKER_WARNINGS
                     46: 
1.7       fefe       47: /* you need to define this if you want to run your programs with large
1.31      fefe       48:  * file support on kernel 2.2 or 2.0 */
1.7       fefe       49: #define WANT_LARGEFILE_BACKCOMPAT
                     50: 
1.8       fefe       51: /* do you want localtime(3) to read /etc/localtime?
                     52:  * Needed for daylight saving time etc. */
                     53: #define WANT_TZFILE_PARSER
1.1       cvs        54: 
1.21      fefe       55: /* do you want the DNS routines to parse and use "domain" and "search"
                     56:  * lines from /etc/resolv.conf?  Normally not used on boot floppies and
                     57:  * embedded environments. */
                     58: #define WANT_FULL_RESOLV_CONF
                     59: 
1.45      fefe       60: /* do you want IPv6 transport support in the DNS resolver? */
                     61: #define WANT_IPV6_DNS
                     62: 
1.27      fefe       63: /* do you want gethostbyname and friends to consult /etc/hosts? */
                     64: #define WANT_ETC_HOSTS
                     65: 
1.46      fefe       66: /* do you want gethostbyname to understand dotted decimal IP numbers
                     67:  * directly and not try to resolve them? */
                     68: #define WANT_INET_ADDR_DNS
                     69: 
1.29      fefe       70: /* do you want math functions high precision rather than fast/small? */
                     71: #define WANT_HIGH_PRECISION_MATH
                     72: 
                     73: /* do you want support for matherr? */
                     74: #define WANT_MATHERR
                     75: 
1.30      fefe       76: /* do you want crypt(3) to use MD5 if the salt starts with "$1$"? */
                     77: #define WANT_CRYPT_MD5
                     78: 
1.32      fefe       79: /* do you want diet to include a safeguard dependency to make linking
1.45      fefe       80:  * against glibc fail?  This may fail with older binutils. */
1.32      fefe       81: #define WANT_SAFEGUARD
1.38      olaf       82: 
1.49      leitner    83: /* this enables an experimental DNS hack of mine.
                     84:  * See http://www.fefe.de/ipv6pnpdns.html */
1.50      leitner    85: // #define WANT_IPV6_PLUGPLAY_DNS
1.49      leitner    86: 
1.38      olaf       87: /* dy you want that malloc(0) return a pointer to a "zero-length" object
                     88:  * that is realloc-able; means realloc(..,size) gives a NEW object (like a
                     89:  * call to malloc(size)).
                     90:  * WARNING: this violates C99 */
                     91: /* #define WANT_MALLOC_ZERO */
                     92: 
1.32      fefe       93: 
1.1       cvs        94: /* stop uncommenting here ;-) */
                     95: #ifndef WANT_FASTER_STRING_ROUTINES
                     96: #define WANT_SMALL_STRING_ROUTINES
1.4       fefe       97: #endif
                     98: 
1.22      fefe       99: #ifdef WANT_THREAD_SAFE
1.44      fefe      100: #ifndef __ASSEMBLER__
1.22      fefe      101: #define errno (*__errno_location())
1.23      fefe      102: #define _REENTRANT
1.44      fefe      103: #endif
1.22      fefe      104: #endif
                    105: 
1.33      olaf      106: #ifdef __DYN_LIB
1.39      olaf      107: /* with shared libraries you MUST have a dynamic aware startcode */
1.33      olaf      108: #ifndef WANT_DYNAMIC
                    109: #define WANT_DYNAMIC
1.35      olaf      110: #endif
                    111: /* saveguard crashes with shared objects ... */
                    112: #ifdef WANT_SAFEGUARD
                    113: #undef WANT_SAFEGUARD
1.33      olaf      114: #endif
                    115: #endif
                    116: 
1.1       cvs       117: #endif