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authorMike Frysinger <vapier@gentoo.org>2005-09-21 03:55:21 +0000
committerMike Frysinger <vapier@gentoo.org>2005-09-21 03:55:21 +0000
commit32f94b63801bbb8fe7619e58ded1c94a062d6874 (patch)
treec14201a0fd2f7591067bc402b195e17dec3cdea6 /include/features.h
parentac7e889a246f40c6621233774a14a32ce460c00e (diff)
merge some misc stuff from glibc
Diffstat (limited to 'include/features.h')
-rw-r--r--include/features.h54
1 files changed, 36 insertions, 18 deletions
diff --git a/include/features.h b/include/features.h
index 27e827172..07680a09e 100644
--- a/include/features.h
+++ b/include/features.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991,92,93,95,96,97,98,99,2000,2001 Free Software Foundation, Inc.
+/* Copyright (C) 1991-1993,1995-2003,2004,2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -31,7 +31,8 @@
_POSIX_SOURCE IEEE Std 1003.1.
_POSIX_C_SOURCE If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
if >=199309L, add IEEE Std 1003.1b-1993;
- if >=199506L, add IEEE Std 1003.1c-1995
+ if >=199506L, add IEEE Std 1003.1c-1995;
+ if >=200112L, all of IEEE 1003.1-2004
_XOPEN_SOURCE Includes POSIX and XPG things. Set to 500 if
Single Unix conformance is wanted, to 600 for the
upcoming sixth revision.
@@ -44,6 +45,8 @@
_GNU_SOURCE All of the above, plus GNU extensions.
_REENTRANT Select additionally reentrant object.
_THREAD_SAFE Same as _REENTRANT, often used by other systems.
+ _FORTIFY_SOURCE If set to numeric value > 0 additional security
+ measures are defined, according to level.
The `-ansi' switch to the GNU C compiler defines __STRICT_ANSI__.
If none of these are defined, the default is to have _SVID_SOURCE,
@@ -72,6 +75,7 @@
__USE_MISC Define things common to BSD and System V Unix.
__USE_GNU Define GNU extensions.
__USE_REENTRANT Define reentrant/thread-safe *_r functions.
+ __USE_FORTIFY_LEVEL Additional security measures used, according to level.
__FAVOR_BSD Favor 4.3BSD things in cases of conflict.
The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
@@ -85,6 +89,7 @@
but are implied by the other feature-test macros defined (or by the
lack of any definitions) are defined by the file. */
+
/* Undefine everything, so we get a clean slate. */
#undef __USE_ISOC99
#undef __USE_POSIX
@@ -103,6 +108,7 @@
#undef __USE_MISC
#undef __USE_GNU
#undef __USE_REENTRANT
+#undef __USE_FORTIFY_LEVEL
#undef __FAVOR_BSD
#undef __KERNEL_STRICT_NAMES
@@ -115,6 +121,20 @@
/* Always use ISO C things. */
#define __USE_ANSI 1
+/* Convenience macros to test the versions of glibc and gcc.
+ Use them like this:
+ #if __GNUC_PREREQ (2,8)
+ ... code requiring gcc 2.8 or later ...
+ #endif
+ Note - they won't work for gcc1 or glibc1, since the _MINOR macros
+ were not defined then. */
+#if defined __GNUC__ && defined __GNUC_MINOR__
+# define __GNUC_PREREQ(maj, min) \
+ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+#else
+# define __GNUC_PREREQ(maj, min) 0
+#endif
+
/* If _BSD_SOURCE was defined by the user, favor BSD over POSIX. */
#if defined _BSD_SOURCE && \
@@ -165,8 +185,8 @@
/* If none of the ANSI/POSIX macros are defined, use POSIX.1 and POSIX.2
(and IEEE Std 1003.1b-1993 unless _XOPEN_SOURCE is defined). */
-#if (!defined __STRICT_ANSI__ && !defined _POSIX_SOURCE && \
- !defined _POSIX_C_SOURCE)
+#if ((!defined __STRICT_ANSI__ || (_XOPEN_SOURCE - 0) >= 500) && \
+ !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE)
# define _POSIX_SOURCE 1
# if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500
# define _POSIX_C_SOURCE 2
@@ -191,6 +211,10 @@
# define __USE_POSIX199506 1
#endif
+#if (_POSIX_C_SOURCE - 0) >= 200112L
+# define __USE_XOPEN2K 1
+#endif
+
#ifdef _XOPEN_SOURCE
# define __USE_XOPEN 1
# if (_XOPEN_SOURCE - 0) >= 500
@@ -242,6 +266,14 @@
# define __USE_REENTRANT 1
#endif
+#if _FORTIFY_SOURCE > 0 && __GNUC_PREREQ (4, 1) && __OPTIMIZE__ > 0
+# if _FORTIFY_SOURCE == 1
+# define __USE_FORTIFY_LEVEL 1
+# elif _FORTIFY_SOURCE > 1
+# define __USE_FORTIFY_LEVEL 2
+# endif
+#endif
+
/* We do support the IEC 559 math functionality, real and complex. */
#define __STDC_IEC_559__ 1
#define __STDC_IEC_559_COMPLEX__ 1
@@ -280,20 +312,6 @@
# define __GLIBC_MINOR__ 2
#endif
-/* Convenience macros to test the versions of glibc and gcc.
- Use them like this:
- #if __GNUC_PREREQ (2,8)
- ... code requiring gcc 2.8 or later ...
- #endif
- Note - they won't work for gcc1 or glibc1, since the _MINOR macros
- were not defined then. */
-#if defined __GNUC__ && defined __GNUC_MINOR__
-# define __GNUC_PREREQ(maj, min) \
- ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
-#else
-# define __GNUC_PREREQ(maj, min) 0
-#endif
-
#define __GLIBC_PREREQ(maj, min) \
((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min))