| 1 | #ifndef _DIETFEATURES_H |
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| 2 | #define _DIETFEATURES_H |
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| 3 | |
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| 4 | /* feel free to comment some of these out to reduce code size */ |
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| 5 | |
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| 6 | #define WANT_FLOATING_POINT_IN_PRINTF |
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| 7 | #define WANT_FLOATING_POINT_IN_SCANF |
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| 8 | #define WANT_CHARACTER_CLASSES_IN_SCANF |
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| 9 | #define WANT_NULL_PRINTF |
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| 10 | /* #define WANT_ERROR_PRINTF */ |
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| 11 | #define WANT_LONGLONG_PRINTF |
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| 12 | #define WANT_LONGLONG_SCANF |
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| 13 | |
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| 14 | /* 128 or 2048 bytes buffer size? */ |
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| 15 | /* #define WANT_SMALL_STDIO_BUFS */ |
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| 16 | |
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| 17 | /* want fread to read() directly if size of data is larger than buffer? |
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| 18 | * This costs a few bytes but is worth it if the application is already |
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| 19 | * buffering. */ |
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| 20 | #define WANT_FREAD_OPTIMIZATION |
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| 21 | |
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| 22 | /* this is only for meaningful for ttyname and sysconf_cpus so far */ |
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| 23 | #define SLASH_PROC_OK |
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| 24 | |
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| 25 | /* use errno_location instead of errno */ |
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| 26 | //#define WANT_THREAD_SAFE |
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| 27 | |
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| 28 | /* support __thread */ |
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| 29 | //#define WANT_TLS |
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| 30 | |
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| 31 | /* make the startcode, etc. dynamic aware ({con,de}structors) */ |
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| 32 | /* #define WANT_DYNAMIC */ |
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| 33 | |
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| 34 | /* GDB support in the dynamic linker */ |
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| 35 | #define WANT_LD_SO_GDB_SUPPORT |
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| 36 | |
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| 37 | /* do you want smaller or faster string routines? */ |
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| 38 | #define WANT_FASTER_STRING_ROUTINES |
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| 39 | |
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| 40 | /* define this to have strncpy zero-fill and not just zero-terminate the |
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| 41 | * string */ |
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| 42 | /* #define WANT_FULL_POSIX_COMPAT */ |
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| 43 | |
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| 44 | /* on i386, Linux has an alternate syscall method since 2002/12/16 */ |
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| 45 | /* on my Athlon XP, it is twice as fast, but it's only in kernel 2.5 */ |
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| 46 | /* 20040118: enabling this breaks User Mode Linux! It's their fault. */ |
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| 47 | //#define WANT_SYSENTER |
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| 48 | |
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| 49 | /* #define WANT_LINKER_WARNINGS */ |
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| 50 | |
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| 51 | /* you need to define this if you want to run your programs with large |
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| 52 | * file support on kernel 2.2 or 2.0 */ |
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| 53 | //#define WANT_LARGEFILE_BACKCOMPAT |
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| 54 | |
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| 55 | /* do you want localtime(3) to read /etc/localtime? |
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| 56 | * Needed for daylight saving time etc. */ |
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| 57 | //#define WANT_TZFILE_PARSER |
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| 58 | |
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| 59 | /* do you want the DNS routines to parse and use "domain" and "search" |
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| 60 | * lines from /etc/resolv.conf? Normally not used on boot floppies and |
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| 61 | * embedded environments. */ |
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| 62 | //#define WANT_FULL_RESOLV_CONF |
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| 63 | |
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| 64 | /* do you want IPv6 transport support in the DNS resolver? */ |
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| 65 | //#define WANT_IPV6_DNS |
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| 66 | |
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| 67 | /* do you want gethostbyname and friends to consult /etc/hosts? */ |
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| 68 | //#define WANT_ETC_HOSTS |
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| 69 | |
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| 70 | /* do you want gethostbyname to understand dotted decimal IP numbers |
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| 71 | * directly and not try to resolve them? */ |
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| 72 | //#define WANT_INET_ADDR_DNS |
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| 73 | |
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| 74 | /* do you want math functions high precision rather than fast/small? */ |
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| 75 | //#define WANT_HIGH_PRECISION_MATH |
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| 76 | |
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| 77 | /* do you want support for matherr? */ |
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| 78 | //#define WANT_MATHERR |
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| 79 | |
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| 80 | /* do you want crypt(3) to use MD5 if the salt starts with "$1$"? */ |
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| 81 | #define WANT_CRYPT_MD5 |
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| 82 | |
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| 83 | /* do you want diet to include a safeguard dependency to make linking |
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| 84 | * against glibc fail? This may fail with older binutils. */ |
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| 85 | //#define WANT_SAFEGUARD |
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| 86 | |
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| 87 | /* This enables zeroconf DNS aka Rendezvous aka Bonjour. */ |
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| 88 | /* This code will try zeroconf DNS if you ask for host.local or if you |
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| 89 | * ask for an unqualified hostname */ |
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| 90 | //#define WANT_PLUGPLAY_DNS |
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| 91 | |
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| 92 | /* do you want that malloc(0) return a pointer to a "zero-length" object |
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| 93 | * that is realloc-able; means realloc(..,size) gives a NEW object (like a |
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| 94 | * call to malloc(size)). |
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| 95 | * WARNING: this violates C99 */ |
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| 96 | /* #define WANT_MALLOC_ZERO */ |
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| 97 | |
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| 98 | /* do you want free to overwrite freed data immediately, in the hope of |
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| 99 | * catching people accessing pointers after they were freed? This does |
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| 100 | * a memset with 0x55 as a value. which is not NULL and not -1. Please |
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| 101 | * note that this is the shotgun method for debugging, what you really |
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| 102 | * want is valgrind. */ |
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| 103 | /* #define WANT_FREE_OVERWRITE */ |
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| 104 | |
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| 105 | /* This enables a stack gap. Basically, the start code does not run |
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| 106 | * main but stackgap, which then does alloca(random()) and calls main. |
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| 107 | * The effect is that buffer overflow exploits will no longer be able to |
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| 108 | * know the address of the buffer. Cost: 62 bytes code on x86. */ |
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| 109 | /* WARNING: this appears to break with some binutils versions. Works |
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| 110 | * for me with binutils 2.15. The symptom is an error message that |
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| 111 | * `main' can not be found. */ |
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| 112 | /* #define WANT_STACKGAP */ |
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| 113 | |
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| 114 | /* Include support for ProPolice/SSP, calls guard_setup */ |
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| 115 | /* ProPolice is part of gcc 4.1 and up, there were patches for earlier |
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| 116 | * versions. To make use of this, compile your application with |
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| 117 | * -fstack-protector. */ |
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| 118 | #if (__GNUC__>4) || ((__GNUC__==4) && (__GNUC_MINOR__>=1)) |
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| 119 | #define WANT_SSP |
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| 120 | #endif |
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| 121 | |
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| 122 | |
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| 123 | |
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| 124 | /* stop uncommenting here ;-) */ |
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| 125 | #if defined(WANT_SSP) || defined(WANT_STACKGAP) |
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| 126 | #define CALL_IN_STARTCODE stackgap |
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| 127 | #else |
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| 128 | #define CALL_IN_STARTCODE main |
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| 129 | #endif |
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| 130 | |
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| 131 | #ifndef WANT_FASTER_STRING_ROUTINES |
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| 132 | #define WANT_SMALL_STRING_ROUTINES |
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| 133 | #endif |
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| 134 | |
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| 135 | #ifdef WANT_THREAD_SAFE |
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| 136 | #ifndef __ASSEMBLER__ |
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| 137 | #define errno (*__errno_location()) |
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| 138 | #define _REENTRANT |
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| 139 | #endif |
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| 140 | #endif |
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| 141 | |
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| 142 | #ifdef __DYN_LIB |
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| 143 | /* with shared libraries you MUST have a dynamic aware startcode */ |
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| 144 | #ifndef WANT_DYNAMIC |
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| 145 | #define WANT_DYNAMIC |
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| 146 | #endif |
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| 147 | /* saveguard crashes with shared objects ... */ |
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| 148 | #ifdef WANT_SAFEGUARD |
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| 149 | #undef WANT_SAFEGUARD |
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| 150 | #endif |
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| 151 | #endif |
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| 152 | |
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| 153 | #endif |
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