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Create USE_ST_TIMESPEC and turn it on for Darwin

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Not all OSes use st_ctim and st_mtim in their struct stat.  In
particular, it appears that OS X uses st_*timespec instead.  So add a
Makefile variable and #define called USE_ST_TIMESPEC to switch the
USE_NSEC defines to use st_*timespec.

This also turns it on by default for OS X (Darwin) machines.  Likely
this is a sane default for other BSD kernels as well, but I don't have
any to test that assumption on.

Signed-off-by: Brian Gernhardt <benji@silverinsanity.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Brian Gernhardt 2009-03-08 16:04:28 -04:00 committed by Junio C Hamano
parent 110c46a909
commit c567383b1e
2 changed files with 12 additions and 0 deletions
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7
Makefile
View File

@ -126,6 +126,9 @@ all::
# randomly break unless your underlying filesystem supports those sub-second
# times (my ext3 doesn't).
#
# Define USE_ST_TIMESPEC if your "struct stat" uses "st_ctimespec" instead of
# "st_ctim"
#
# Define NO_NSEC if your "struct stat" does not have "st_ctim.tv_nsec"
# available. This automatically turns USE_NSEC off.
#
@ -663,6 +666,7 @@ ifeq ($(uname_S),Darwin)
endif
NO_MEMMEM = YesPlease
THREADED_DELTA_SEARCH = YesPlease
USE_ST_TIMESPEC = YesPlease
endif
ifeq ($(uname_S),SunOS)
NEEDS_SOCKET = YesPlease
@ -928,6 +932,9 @@ endif
ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
BASIC_CFLAGS += -DNO_ST_BLOCKS_IN_STRUCT_STAT
endif
ifdef USE_ST_TIMESPEC
BASIC_CFLAGS += -DUSE_ST_TIMESPEC
endif
ifdef NO_NSEC
BASIC_CFLAGS += -DNO_NSEC
endif

5
git-compat-util.h
View File

@ -389,8 +389,13 @@ void git_qsort(void *base, size_t nmemb, size_t size,
#define ST_CTIME_NSEC(st) 0
#define ST_MTIME_NSEC(st) 0
#else
#ifdef USE_ST_TIMESPEC
#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
#else
#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
#endif
#endif
#endif