Enable this option and thus re-include crypt() support for the SHA256,
SHA512 and Blowfish ciphers on all devices. According to commit
9365745f8e ("musl: add a hack to remove unused crypt() algorithms,
saves ~14k after lzma") it should add about ~14k to the resulting image,
which seems to be a reasonable size increase for consistent crypt()
support.
Decided to not remove this hack completely as it might be still useful
for people trying to fit custom images onto smaller devices and the
patch is rather simple so we can afford to keep it for now.
References: https://github.com/openwrt/openwrt/pull/1331
Signed-off-by: Petr Štetiar <ynezz@true.cz>
This patch never went upstream so remove it. GCC should already add such
a check to the common functions.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Remove GLOB_ONLYDIR patch. Only fstools relies on it. fstools has been
fixed separately.
Remove woresize.h file. It seems to be for an old version of GCC.
Remove features.h and glibc-types files. Same as above.
Remove sys/cdefs.h. This is a deprecated header. Patches to fix packages
that use it have already been patched.
Tested with all packages in the base tree. They all compile.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
This release introduces 64-bit time_t, which is needed to avoid the
year 2038 problem.
Remove upstream patches. Refreshed others.
Rebased features.h file based on latest musl.
Signed-off-by: Rosen Penev <rosenp@gmail.com>
The wcsnrtombs function in all musl libc versions up through 1.2.1 has
been found to have multiple bugs in handling of destination buffer
size when limiting the input character count, which can lead to
infinite loop with no forward progress (no overflow) or writing past
the end of the destination buffera.
This function is not used internally in musl and is not widely used,
but does appear in some applications. The non-input-limiting form
wcsrtombs is not affected.
All users of musl 1.2.1 and prior versions should apply the attached
patch, which replaces the overly complex and erroneous implementation.
The upcoming 1.2.2 release will adopt this new implementation.
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Add FTW_ACTIONRETVAL mode and update nftw library for walking file trees.
Update needed to build bpftool userspace utility from Linux kernel source.
Also increment PKG_RELEASE.
Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
To prevent "wrong" musl packages which have a new version number
but the package still contains an old version, because
PKG_SOURCE_VERSION was unchanged.
Ref: musl ml https://www.openwall.com/lists/musl/2020/05/22/4
Reviewed-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
1.1.24 release notes
new features:
- GLOB_TILDE extension to glob
- non-stub catgets localization API, using netbsd binary catalog format
- posix_spawn file actions for [f]chdir (extension, pending future standard)
- secure_getenv function (extension)
- copy_file_range syscall wrapper (Linux extension)
- header-level support for new linux features in 5.2
performance:
- new fast path for lrint (generic C version) on 32-bit archs
major internal changes:
- functions involving time are overhauled to be time64-ready in 32-bit archs
- x32 uses the new time64 code paths to replace nasty hacks in syscall glue
compatibility & conformance:
- support for powerpc[64] unaligned relocation types
- powerpc[64] and sh sys/user.h no longer clash with kernel asm/ptrace.h
- select no longer modifies timeout on failure (or at all)
- mips64 stat results are no longer limited to 32-bit time range
- optreset (BSD extension) now has a public declaration
- support for clang inconsistencies in wchar_t type vs some 32-bit archs
- mips r6 syscall asm no longer has invalid lo/hi register clobbers
- vestigial asm declarations of __tls_get_new are removed (broke some tooling)
- riscv64 mcontext_t mismatch glibc's member naming is corrected
bugs fixed:
- glob failed to match broken symlinks consistently
- invalid use of interposed calloc to allocate initial TLS
- various dlsym symbol resolution logic errors
- semctl with SEM_STAT_ANY didn't work
- pthread_create with explicit scheduling was subject to priority inversion
- pthread_create failure path had data race for thread count
- timer_create with SIGEV_THREAD notification had data race getting timer id
- wide printf family failed to support l modifier for float formats
arch-specific bugs fixed:
- x87 floating point stack imbalance in math asm (i386-only CVE-2019-14697)
- x32 clock_adjtime, getrusage, wait3, wait4 produced junk (struct mismatches)
- lseek broken on x32 and mipsn32 with large file offsets
- riscv64 atomics weren't compiler barriers
- riscv64 atomics had broken asm constraints (missing earlyclobber flag)
- arm clone() was broken when compiled as thumb if start function returned
- mipsr6 setjmp/longjmp did not preserve fpu register state correctly
Refreshed all patches.
Removed upstreamed.
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
musl libc through 1.1.23 has an x87 floating-point stack adjustment
imbalance, related to the math/i386/ directory. In some cases, use of
this library could introduce out-of-bounds writes that are not present
in an application's source code.
This problem only affects x86 and no other architectures.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This happens only the second time a library is loaded by dlopen().
After lib1 is loaded, dlsym(lib1,"undef1") correctly resolves the undef
symbol from lib1 dependencies. After the second library is loaded,
dlsym(lib2,"undef1") was returning the address of "undef1" in lib2
instead of searching lib2 dependencies.
Using upstream fix which now uses the same logic for relocation time
and dlsym.
Fixesopenwrt/packages#9297
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@gmail.com>
new features:
- riscv64 port
- configure now allows customizing AR and RANLIB vars
- header-level support for new linux features in 5.1
major internal changes:
- removed extern __syscall; syscall header code is now fully self-contained
performance:
- new math library implementation for log/exp/pow
- aarch64 dynamic tlsdesc function is streamlined
compatibility & conformance:
- O_TTY_INIT is now defined
- sys/types.h no longer pollutes namespace with sys/sysmacros.h in any profile
- powerpc asm is now compatible with clang internal assembler
changes for new POSIX interpretations:
- fgetwc now sets stream error indicator on encoding errors
- fmemopen no longer rejects 0 size
bugs fixed:
- static TLS for shared libraries was allocated wrong on "Variant I" archs
- crash in dladdr reading through uninitialized pointer on non-match
- sigaltstack wrongly errored out on invalid ss_size when doing SS_DISABLE
- getdents function misbehaved with buffer length larger than INT_MAX
- set*id could deadlock after fork from multithreaded process
arch-specfic bugs fixed:
- s390x SO_PEERSEC definition was wrong
- passing of 64-bit syscall arguments was broken on microblaze
- posix_fadvise was broken on mips due to missing 7-arg syscall support
- vrregset_t layout and member naming was wrong on powerpc64
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Daniel Engberg requested switching over to https transport
since he seems to be stuck behind a corporate firewall that
does all the wrong things.
Rick Felker noted that this is "experimental and might break".
<https://www.openwall.com/lists/musl/2019/03/27/1>.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
new features:
- priority-inheritance mutexes
- membarrier syscall, pre-registration to use it, fallback emulation
- header-level support for new linux features in 4.19, 4.20, 5.0
major internal changes:
- complete, async-safe view of all existent threads as global list
- robust __synccall based on new thread list
- new dynamic TLS is installed synchronously at dlopen
- TLSDESC resolver functions no longer make bad ABI assumptions to call C
- resolved shared library dependencies are now recorded
compatibility & conformance:
- dependency-order shared library constructor execution
- sigaltstack no longer rejects SS_AUTODISARM, future flags
- FILE is now a complete (dummy) type in pre-C11 feature profiles
- setvbuf reports failure on invalid arguments
- TSVTX is exposed unconditionally in tar.h
- multithreaded set*id() no longer depends on /proc
- key slot reuse after pthread_key_delete no longer depends on /proc
bugs fixed:
- failures in multithreaded set*id() with concurrent thread creation/exit
- interposed free was called from invalid/inconsistent contexts
- freeaddrinfo performed invalid free of some partial results lists
- dlsym dependency order search had false negatives and false positives
- dn_skipname gave wrong results for labels with 8-bit content
- dcngettext clobbered errno, often breaking printing of error messages
- sscanf read past end of buffer under certain conditions (1.1.21 regression)
- pthread_key_create spuriously failed under race condition (1.1.21 regression)
- fdopendir wrongly succeeded with O_PATH file descriptors
- gets behaved incorrectly in presence of null bytes
- namespace violations in c11 tsd and mutex function dependencies
- incorrect prototype for makecontext (unimplemented)
arch-specfic bugs fixed:
- s390x had wrong values for POSIX_FADV_DONTNEED/_NOREUSE
Extensively tested on dozens of devices, covering most popular architectures.
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Signed-off-by: Dainis Jonitis <dainis.jonitis@ubnt.com>
Signed-off-by: Roman Yeryomin <roman@advem.lv>
<https://www.openwall.com/lists/musl/2019/01/21/8>
"This release makes improvements with respect to default thread stack
size, including increasing the default from 80k to 128k, increasing
the default guard size from 4k to 8k, and allowing the default to be
increased via ELF headers so that programs that need larger stacks can
be build without source-level changes, using just LDFLAGS.
Insufficient stack size for AIO threads on kernels that don't honor
the constant MINSIGSTKSZ is also fixed.
The glob core has been rewritten to fix inability to see past
searchable-but-unreadable path components, and to avoid excessive
stack usage and unnecessary syscalls. The tsearch AVL tree
implementation has also been rewritten for better size and
performance. The math library adds more native single-instruction
implementations for arm, s390x, powerpc, and x86_64.
Various bugs are fixed, including several possible deadlocks, one of
which was a new regression in 1.1.20."
detailed release notes can be found in the WHATSNEW file:
<http://git.musl-libc.org/cgit/musl/tree/WHATSNEW#n1989>
Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Instead of silently downgrading any non-MD5 crypt() request to DES,
cleanly fail with return NULL and errno = ENOSYS. This allows callers
to notice the missing support instead of the unwanted silent fallback
to DES.
Also add a menuconfig toolchain option to optionally disable the crypt
size hack completely. This can be probably made dependant on SMALL_FLASH
or a similar feature indicator in a future commit.
Ref: https://github.com/openwrt/openwrt/pull/1331
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Don't override optimization set by upstream.
Provides a speed increase for internal (library), malloc and string
operations in musl.
Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>
[add : to PKG_RELEASE release variable for consistency]
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
This release introduces the ability to replace/interpose the allocator
(malloc) subject to certain restrictions, adds an experimental m68k
port, and makes notable improvements to stdio (application-provided
buffers), getaddrinfo (AI_ADDRCONFIG, support for IPv4-only kernel
configurations), the dynamic linker (safety against dlopen of
libraries using initial-exec TLS model, reclaiming unused memory on
FDPIC archs, better dladdr results), and handling of default thread
stack size (pthread_setattr_default_np now works more reliably).
Many bugs have been fixed, including potentially dangerous regressions
in iconv (only for new conversions to legacy encodings) and visibly
incorrect behavior in printf on non-x86 archs (%a format with
precision specifier), in getopt_long_only when short options are a
prefix for a long option, in complex arc-trig/hyperbolic functions, in
strftime and mktime (timezone-specific issues), and numerous
less-obvious places.
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
[altered commit msg a bit keeping it tight]
Tested-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Differing from all other archs supported by musl, MIPS defines SO_PEERSEC
to 30 instead of 31.
Patch has also been submitted upstream.
Reported-by: Andrey Jr. Mlenikov <temnota.am@gmail.com>
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
This updates musl from a commit between 1.1.18 and 1.1.19 to the final
release of the version 1.1.19.
This mostly fixes bugs in musl.
The size of the uncompressed binary is increased by about 4 KB.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Autorebuild is disabled for the toolchain to avoid build-order issues.
However, rebuilding musl is safe, so exclude it from that restriction.
Avoids the need for manual cleaning on kernel header <-> libc API
changes like the ones introduced recently
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This replaces the current patches used to make the kernel headers
compatible with musl with the version which was accepted upstream. This
is included in upstream kernel 4.15.
This was compile tested with iproute2 build on all supported kernel
versions with musl and one one with glibc.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Changes:
72656157 fix fgetwc when decoding a character that crosses buffer boundary
a223dbd2 add reverse iconv mappings for JIS-based encodings
105eff9d generalize iconv framework for 8-bit codepages
a71b46cf fix malloc state corruption when ldso rejects loading a second libc
d060edf6 reformat cjk iconv tables to be diff-friendly, match tool output
c21051e9 prevent fork's errno from being clobbered by atfork handlers
a39f20bf add iso-2022-jp support (decoding only) to iconv
5b546faa add iconv framework for decoding stateful encodings
0df5b39a simplify/optimize iconv utf-8 case
9eb6dd51 handle ascii range individually in each iconv case
bff59d13 move iconv_close to its own translation unit
79f49eff refactor iconv conversion descriptor encoding/decoding
30fdda6c fix getaddrinfo error code for non-numeric service with AI_NUMERICSERV
67b29947 fix mismatched type of __pthread_tsd_run_dtors weak definition
13935337 s390x: use generic ioctl.h
4dc44ce8 microblaze: add statx syscall from linux v4.13
ffd048a0 aarch64: add extra_context struct from linux v4.13
6651ef1f add new tcp.h socket options from linux v4.13
14ced228 add new fcntl.h macros from linux v4.13
754f66af ioctl TIOCGPTPEER from linux v4.13
c35a8bf4 add SO_ getsockopt options from linux v4.13
5daaed6a s390x: add syscall number for s390_guarded_storage from linux v4.12
2dc6760f i386: add arch_prctl syscall number from linux v4.12
840d45be aarch64: add new HWCAP_* flags from linux v4.12
4c811227 add ARPHDR_VSOCKMON from linux v4.12
54f04d99 add new SO_ socket options from linux v4.12
9864f60e add statx syscall numbers from linux v4.11
c519658c add TCP_NLA_* enums from linux v4.11
ee3ae782 add TCP_FASTOPEN_CONNECT tcp socket option from linux v4.11
3eb82f73 add ETH_P_IBOE from linux v4.11
bd1560f6 update aarch64 hwcap.h for linux v4.11
cee73f0c add kexec_file_load syscall number on powerpc from linux v4.10
8f569557 add microblaze syscall numbers from linux v4.10
d8004030 add TFD_TIMER_CANCEL_ON_SET that timerfd.h was missing
f5638c22 add ETH_MIN_MTU and ETH_MAX_MTU from linux v4.10
01369691 add IP_RECVFRAGSIZE and IPV6_RECVFRAGSIZE from linux v4.10
5c596ed8 add SCM_TIMESTAMPING_OPT_STATS and related TCP_ enums from linux v4.10
6fc6ca1a adjust posix_spawn dup2 action behavior to match future requirements
Cc: Syrone Wong <wong.syrone@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
Fixes critical issues for memset() & fflush()
Changes:
5f7efb8 move IPPORT_RESERVED from netdb.h to netinet/in.h
5f3b652 add powerpc64 and s390x to list of supported archs in INSTALL
file
9d4c902 fix undefined behavior in memset due to missing sequence points
c7f56b4 __init_libc: add fallbacks for __progname setup
cc08669 add SIOCGSTAMPNS socket ioctl macro to ioctl.h
02b50c9 fix mips ioctl macros to match linux asm/sockios.h
670d6d0 fix unsynchronized access to FILE structure in fflush(0)
Tested on cns3xxx & imx6
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Changes:
1698fe6 fix build failure for sh4a due to missing colon in asm statement
80bf595 trap UB from attempts to join a detached thread
e31c8c2 ppc64: fix setjmp/longjmp handling of TOC pointer
52cf5c1 qsort: add a short comment about the algorithm
dc2f368 disable global visibility override hack (vis.h) by default
947d330 add _NL_LOCALE_NAME extension to nl_langinfo
a08910f fix missing volatile qualifier on lock in __get_locale
2e6e084 remove ineffective compiler assist from printf
bc42dcb fix undefined behavior in ptrace
d906fa3 unify the use of FUTEX_PRIVATE
60ab365 fix undefined behavior in free
f688884 reapply va_arg hacks removal to wprintf
bd00cc8 remove useless declarations in string.h
f3055e0 allow specifying argv[0] when invoking a program via ldso
command
43c423a fix regression in dlopen promotion from RTLD_LOCAL to
RTLD_GLOBAL
66b53cf ldso: avoid spurious & possible erroneous work for libs with no
deps
94f7441 powerpc64: add single-instruction math functions
9d12a6a fix clang CFLAGS checks and silence unused argument warnings
ce385fc s390x: add single-instruction math functions
e6def54 fix arm run-time abi string functions
91d34c4 fix regression in getspnam[_r] error code for insufficient
buffer size
5948bc1 fix omission of microblaze user.h definitions
b7bfb5c fix iconv conversions for iso88592-iso885916
64f8558 handle errors from localtime_r in ctime_r
2d7d05f set errno when getpw*_r, getgr*_r, and getspnam_r fail
5c10c33 handle localtime errors in ctime
1c86c7f handle mremap failure in realloc of mmap-serviced allocations
1080008 getdate: correctly specify error number
af05173 catopen: set errno to EOPNOTSUPP
84eff79 fix glob failure to match plain "/" to root directory
bc313e8 use hard-coded sh4a atomic opcodes to avoid linker errors on sh
179766a towupper/towlower: fast path for ascii chars
1c49700 remove long-obsolete clang workarounds from mips* syscall_arch.h
files
4073f03 fix fstatat syscall on mips64
81f4a12 fix fchown fallback on arches without chown(2)
97bd6b0 fix iconv conversions to legacy 8bit encodings
f9f686b have posix_spawnattr_setflags check for supported flags
77e895d add no-op POSIX_SPAWN_USEVFORK to spawn.h
5555041 s390x: provide sigcontext struct definition
bb439bb implement new posix_spawn flag POSIX_SPAWN_SETSID
58e2396 remove va_arg hacks in printf core with undefined behavior
e1232f5 make ttyname[_r] return ENODEV rather than ENOENT
1a7fa5e fix regression in support for resolv.conf attempts option
8c44a06 fix scalbn when result is in the subnormal range
2577b1b allow full-range file offsets to mmap on archs with 64-bit
syscall args
b3751c3 fix dl_iterate_phdr in static PIE binaries
1ca5975 fix read past end of buffer in getaddrinfo backend
54807d4 aarch64: add single instruction math functions
b6e1fe0 fix strptime output for %C without %y
834ef7a fix processing of strptime %p format
85dfab7 fix off-by-one in strptime %j
9571c53 regex: fix newline matching with negated brackets
e6917ec increase limit on locale name length from 15 to 23 bytes
e4fc9ad search locale name variants for gettext translations
16319a5 make setlocale return a single name for LC_ALL if all categories
match
0c53178 fix dlopen/dlsym regression opening libs already loaded at
startup
dbff2bb fix POSIX-format TZ dst transition times for southern hemisphere
74bca42 s390x: fix fpreg_t and remove unused per_struct
a393d5c precalculate gnu hash rather than doing it lazily in find_sym
inner loop
8cba1dc fix threshold constants in j0f, y0f, j1f, y1f
cb52539 remove unused refcnt field for shared libraries
c49d3c8 avoid loading of multiple libc versions via explicit pathname
3ec8b3a fix one-byte overflow in legacy getpass function
733d1ea fix wide scanf's use of a compound literal past its lifetime
6a209f1 fix possible fd leak, unrestored cancellation state on dns
socket fail
500f5be in static dl_iterate_phdr, fix use of possibly-uninitialized aux
data
6582baa fix free of uninitialized buffer pointer on error in regexec
6476b81 emulate lazy relocation as deferrable relocation
4823b13 reorder addend handling before symbol lookup in relocation code
4ff234f rework ldso handling of global symbol table for consistency
c9783e4 treat STB_WEAK and STB_GNU_UNIQUE like STB_GLOBAL in find_sym
fc85fb3 fix ld-behavior-dependent crash in ppc64 ldso startup
827c4e6 fix lsearch and lfind to pass key as first arg to the compar
callback
0a4a16d allow page size to vary on arm
b261a24 fix build regression in arm atomics asm with new binutils
9201c3a s390x: implement dlsym
d6601f0 avoid unbounded strlen in gettext functions
dbbb373 fix use of uninitialized pointer in gettext core
01e6bbe fix bindtextdomain logic error deactivating other domains
6894f84 fix spurious EINTR errors from multithreaded set*id, etc.
1f53e7d fix crashes in x32 __tls_get_addr
27b3fd6 fix crash from corrupted tls module list after failed dlopen
809ff8c treat base 1 as an error in strtol-family functions
786fda8 fix getopt[_long] clobbering of optopt on success
150747b reduce impact of REG_* namespace pollution in x86[_64] signal.h
Tested on cns3xxx & imx6
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
This patch updates musl to 1.1.16+ [0] and removes all the
backported patches. This is a major release and tagged as such.
For more information visit musl-libc.org or read the WHATSNEW.
Furthermore, this patch also changes musl to download directly
from git. This makes it easier to update musl in the future.
The patch custom Add-format-attribute-to-some-function-declarations.patch
was assigned a new 400- number. This should avoid confusion
since 0xx numbers are usually assigned to backports.
[0] <http://git.musl-libc.org/cgit/musl/commit/?id=769f53598e781ffc89191520f3f8a93cb58db91f>
Cc: Hannu Nyman <hannu.nyman@iki.fi>
Cc: Koen Vandeputte <koen.vandeputte@ncentric.com>
Cc: Jo-Philipp Wich <jo@mein.io>
Cc: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Backport most important fixes up to latest HEAD
- Taken post-commit reverts/fixes into account
Compile tested
Run-tested on cns3xxx & imx6 targets
Signed-off-by: Koen Vandeputte <koen.vandeputte@ncentric.com>
fix parsing of the < > quoted time zone names. Compare the correct
character instead of repeatedly comparing the first character.
Patch has been submitted to upstream as
http://www.openwall.com/lists/musl/2016/10/24/3
Longer explanation in
http://www.openwall.com/lists/musl/2016/10/19/1
Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
[Jo-Philipp Wich: move references into commit message, shorten title prefix]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
The removed patch is already integrated in upstream musl.
Add one additional patch which fixes a regression on mips.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
No extra libc header build step is done, so no extra toolchain is needed
for preparing it.
This saves a significant amount of build time and disk space
Signed-off-by: Felix Fietkau <nbd@nbd.name>
mips returns -ENOSYS in case it can not handle the vdso call and wants
the libc to call the original syscall in such a case. This fixes the
patch to add such handling. I hope this fixes the random reboots I got.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
SVN-Revision: 48501
GCC and Clang are able to check the format arguments given to a
function and warn the user if there is a error in the format arguments
or if there is a potential uncontrolled format string security problem
in the code. GCC does this automatically for some functions like
printf(), but it is also possible to annotate other functions in a way
that it will check them too. This feature is used by glibc for many
functions. This patch adds the attribute to the some functions of musl
expect for these functions where gcc automatically adds it.
GCC automatically adds checks for these functions: printf, fprintf,
sprintf, scanf, fscanf, sscanf, strftime, vprintf, vfprintf and
vsprintf.
The documentation from gcc is here:
https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html
The documentation from Clang is here:
http://clang.llvm.org/docs/AttributeReference.html#format-gnu-format
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
SVN-Revision: 48467
