Return to dietfeatures.h CVS log

Up to [DVB] / dietlibc

  add sigisemptyset, sigandset and sigorset (John K. Hohm)
  minor additions to make gdb 6.3 happy (John K. Hohm)
  ld.so support for gdb (John K. Hohm)
  implement nice(2) via setpriority() if there is no nice syscall

#ifndef _DIETFEATURES_H
#define _DIETFEATURES_H

/* feel free to comment some of these out to reduce code size */

#define WANT_FLOATING_POINT_IN_PRINTF
#define WANT_FLOATING_POINT_IN_SCANF
#define WANT_CHARACTER_CLASSES_IN_SCANF
#define WANT_NULL_PRINTF
/* #define WANT_ERROR_PRINTF */
#define WANT_LONGLONG_PRINTF
#define WANT_LONGLONG_SCANF

/* 128 or 2048 bytes buffer size? */
/* #define WANT_SMALL_STDIO_BUFS */

/* want fread to read() directly if size of data is larger than buffer?
 * This costs a few bytes but is worth it if the application is already
 * buffering. */
#define WANT_FREAD_OPTIMIZATION

/* this is only for meaningful for ttyname and sysconf_cpus so far */
#define SLASH_PROC_OK

/* use errno_location instead of errno */
#define WANT_THREAD_SAFE

/* make the startcode, etc. dynamic aware ({con,de}structors) */
/* #define WANT_DYNAMIC */

/* GDB support in the dynamic linker */
#define WANT_LD_SO_GDB_SUPPORT

/* do you want smaller or faster string routines? */
/* #define WANT_FASTER_STRING_ROUTINES */

/* define this to have strncpy zero-fill and not just zero-terminate the
 * string */
/* #define WANT_FULL_POSIX_COMPAT */

/* on i386, Linux has an alternate syscall method since 2002/12/16 */
/* on my Athlon XP, it is twice as fast, but it's only in kernel 2.5 */
/* 20040118: enabling this breaks User Mode Linux!  It's their fault. */
#define WANT_SYSENTER

#define WANT_LINKER_WARNINGS

/* you need to define this if you want to run your programs with large
 * file support on kernel 2.2 or 2.0 */
#define WANT_LARGEFILE_BACKCOMPAT

/* do you want localtime(3) to read /etc/localtime?
 * Needed for daylight saving time etc. */
#define WANT_TZFILE_PARSER

/* do you want the DNS routines to parse and use "domain" and "search"
 * lines from /etc/resolv.conf?  Normally not used on boot floppies and
 * embedded environments. */
#define WANT_FULL_RESOLV_CONF

/* do you want IPv6 transport support in the DNS resolver? */
#define WANT_IPV6_DNS

/* do you want gethostbyname and friends to consult /etc/hosts? */
#define WANT_ETC_HOSTS

/* do you want gethostbyname to understand dotted decimal IP numbers
 * directly and not try to resolve them? */
#define WANT_INET_ADDR_DNS

/* do you want math functions high precision rather than fast/small? */
#define WANT_HIGH_PRECISION_MATH

/* do you want support for matherr? */
#define WANT_MATHERR

/* do you want crypt(3) to use MD5 if the salt starts with "$1$"? */
#define WANT_CRYPT_MD5

/* do you want diet to include a safeguard dependency to make linking
 * against glibc fail?  This may fail with older binutils. */
#define WANT_SAFEGUARD

/* this enables an experimental DNS hack of mine.
 * See http://www.fefe.de/ipv6pnpdns.html */
// #define WANT_IPV6_PLUGPLAY_DNS

/* do you want that malloc(0) return a pointer to a "zero-length" object
 * that is realloc-able; means realloc(..,size) gives a NEW object (like a
 * call to malloc(size)).
 * WARNING: this violates C99 */
/* #define WANT_MALLOC_ZERO */

/* This enables a stack gap.  Basically, the start code does not run
 * main but stackgap, which then does alloca(random()) and calls main.
 * The effect is that buffer overflow exploits will no longer be able to
 * know the address of the buffer.  Cost: 62 bytes code on x86. */
/* WARNING: this appears to break with some binutils versions.  Works
 * for me with binutils 2.15.  The symptom is an error message that
 * `main' can not be found. */
#define WANT_STACKGAP

/* stop uncommenting here ;-) */
#ifndef WANT_FASTER_STRING_ROUTINES
#define WANT_SMALL_STRING_ROUTINES
#endif

#ifdef WANT_THREAD_SAFE
#ifndef __ASSEMBLER__
#define errno (*__errno_location())
#define _REENTRANT
#endif
#endif

#ifdef __DYN_LIB
/* with shared libraries you MUST have a dynamic aware startcode */
#ifndef WANT_DYNAMIC
#define WANT_DYNAMIC
#endif
/* saveguard crashes with shared objects ... */
#ifdef WANT_SAFEGUARD
#undef WANT_SAFEGUARD
#endif
#endif

#endif