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* Added autoconf support for cacheline_aligned and SMP_CACHE_BYTES.

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git-svn-id: svn://rakshasa.no/libtorrent/trunk/rtorrent@1115 e378c898-3ddf-0310-93e7-cc216c733640
This commit is contained in:
rakshasa
2009-12-18 21:56:14 +00:00
parent 2304983f4f
commit 5470e50ffb
8 changed files with 38 additions and 19 deletions
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scripts/common.m4
+20
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@@ -181,6 +181,26 @@ AC_DEFUN([TORRENT_CHECK_MADVISE], [
])
])
AC_DEFUN([TORRENT_CHECK_CACHELINE], [
AC_MSG_CHECKING(for cacheline)
AC_COMPILE_IFELSE(
[[#include <stdlib.h>
#include <linux/cache.h>
void* vptr __cacheline_aligned;
void f() { posix_memalign(&vptr, SMP_CACHE_BYTES, 42); }
]],
[
AC_MSG_RESULT(found builtin)
AC_DEFINE(LT_SMP_CACHE_BYTES, SMP_CACHE_BYTES, Largest L1 cache size we know of, should work on all archs.)
AC_DEFINE(lt_cacheline_aligned, __cacheline_aligned, LibTorrent defined cacheline aligned.)
], [
AC_MSG_RESULT(using default 128 bytes)
AC_DEFINE(LT_SMP_CACHE_BYTES, 128, Largest L1 cache size we know of, should work on all archs.)
AC_DEFINE(lt_cacheline_aligned, __attribute__((__aligned__(LT_SMP_CACHE_BYTES))), LibTorrent defined cacheline aligned.)
])
])
AC_DEFUN([TORRENT_CHECK_EXECINFO], [
AC_MSG_CHECKING(for execinfo.h)