Commit Graph

9 Commits

Author SHA1 Message Date
Brad King 8479dc46f1 liblzma: Avoid possible overflow on signed left shift
Use an unsigned value to produce the needed mask.
2016-05-25 10:02:02 -04:00
Brad King a2df4a3f76 liblzma: Disable XL compiler optimizations altogether
Revert commit 82c51a8a (liblzma: Disable XL compiler optimizations in
one source to avoid crash, 2015-04-02) and instead add a compiler flag
to disable optimizations in every source of liblzma.  Somehow the XL
compiler optimizations create incorrect behavior in liblzma and lead
to crashes or truncated output during compression.
2015-04-08 13:08:53 -04:00
Brad King 82c51a8ac6 liblzma: Disable XL compiler optimizations in one source to avoid crash
Somehow optimizations of lzma_lzma_optimum_normal by the IBM XL C
compiler cause it to crash.  Simply disable optimizations of this source
file with a pragma.
2015-04-02 13:17:57 -04:00
Chuck Atkins 2dd17a546f liblzma: Fix compilation with PGI compiler
- sha265.c is using some C99 specific features, in particular static
array dimensions in a function parameter array (see section 6.7.5-7
of the C99 spec).  A #ifndef check was in place to prevent compilation
under MSVC but it actually needed to check for C99 compliance instead.
Even still, the C99 code fails on a few compilers (PGI being one) so for
compatibility reasons, the C99 version of the function declaration is
removed entirely, leaving only the C89 version.

- CHECK_SYMBOL_EXISTS is used to determine the presense of bswap
functions from byteswap.h.  Most compilers re-dedefine the bswap_N
functions as a __bswap_N function implemented by the compiler.  Since
bswap_N is usually defined as a macro then it's mere presence passes
the check.  Some versions of the PGI compiler though have shipped
broken headers for byteswap.h, in particular 11.3 for x64 linux
provides byteswap.h but is missing an associated bits/byteswap.h which
causes some of the bswap_N macros to be defined but broken and unusable.
The bswap_N checks have been converted to CHECK_SOURCE_COMPILES to
ensure that the bswap_N calls are actually usable and not just merely
defined.
2014-08-04 10:12:51 -04:00
Brad King 73eab246fb liblzma: Avoid defining a 'restrict' macro
Any "#define restrict ..." line may conflict with MSVC header files
that use "__declspec(restrict)".  Define our own LZMA_RESTRICT macro
in "Utilities/cmliblzma/config.h.in" and transform liblzma code to
use it:

 git grep -lE '\<restrict\>' Utilities/cmliblzma/liblzma |
   xargs sed -i 's/\<restrict\>/LZMA_RESTRICT/g'
2014-07-29 08:45:36 -04:00
Daniel Pfeifer 7a92eddbcb liblzma: Port from C99 to C89/90
Remove use of designated initializers and declarations of variables
after statements.  Leave "//" comments as-is for now.
2014-07-29 08:44:36 -04:00
Daniel Pfeifer b2a07ca49c liblzma: Add CMake build system
Modify sources just enough to build without the full xz common
directory.
2014-07-23 10:34:55 -04:00
Brad King d44ad1612b liblzma: Remove unused Makefile.* files
We will provide our own CMake-based build system.
2014-07-23 10:34:55 -04:00
Brad King 133d42fe59 Merge branch 'liblzma-upstream' into add-liblzma 2014-07-21 15:54:44 -04:00