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Makefile: introduce NO_PTHREADS 

This introduces make variable NO_PTHREADS for platforms that lack the
support for pthreads library or people who do not want to use it for
whatever reason.  When defined, it makes the multi-threaded index
preloading into a no-op, and also disables threaded delta searching by
pack-objects.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Mike Ralphson <mike@abacus.co.uk>
Tested-by: Johannes Sixt <j6t@kdbg.org> (AIX 4.3.x)
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2008-11-15 04:08:14 -08:00
parent 5413812f08
commit 46059cc632
4 changed files with 31 additions and 1 deletions
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17
Makefile
View File

@ -90,6 +90,8 @@ all::
#
# Define NO_MMAP if you want to avoid mmap.
#
# Define NO_PTHREADS if you do not have or do not want to use Pthreads.
#
# Define NO_PREAD if you have a problem with pread() system call (e.g.
# cygwin.dll before v1.5.22).
#
@ -164,6 +166,7 @@ uname_M := $(shell sh -c 'uname -m 2>/dev/null || echo not')
uname_O := $(shell sh -c 'uname -o 2>/dev/null || echo not')
uname_R := $(shell sh -c 'uname -r 2>/dev/null || echo not')
uname_P := $(shell sh -c 'uname -p 2>/dev/null || echo not')
uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')
# CFLAGS and LDFLAGS are for the users to override from the command line.
@ -722,6 +725,11 @@ ifeq ($(uname_S),AIX)
INTERNAL_QSORT = UnfortunatelyYes
NEEDS_LIBICONV=YesPlease
BASIC_CFLAGS += -D_LARGE_FILES
ifneq ($(shell expr "$(uname_V)" : '[1234]'),1)
THREADED_DELTA_SEARCH = YesPlease
else
NO_PTHREADS = YesPlease
endif
endif
ifeq ($(uname_S),GNU)
# GNU/Hurd
@ -766,6 +774,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
NO_STRCASESTR = YesPlease
NO_STRLCPY = YesPlease
NO_MEMMEM = YesPlease
NO_PTHREADS = YesPlease
NEEDS_LIBICONV = YesPlease
OLD_ICONV = YesPlease
NO_C99_FORMAT = YesPlease
@ -1017,9 +1026,15 @@ ifdef INTERNAL_QSORT
COMPAT_OBJS += compat/qsort.o
endif
ifdef NO_PTHREADS
THREADED_DELTA_SEARCH =
BASIC_CFLAGS += -DNO_PTHREADS
else
EXTLIBS += $(PTHREAD_LIBS)
endif
ifdef THREADED_DELTA_SEARCH
BASIC_CFLAGS += -DTHREADED_DELTA_SEARCH
EXTLIBS += $(PTHREAD_LIBS)
LIB_OBJS += thread-utils.o
endif
ifdef DIR_HAS_BSD_GROUP_SEMANTICS

1
config.mak.in
View File

@ -51,4 +51,5 @@ OLD_ICONV=@OLD_ICONV@
NO_DEFLATE_BOUND=@NO_DEFLATE_BOUND@
FREAD_READS_DIRECTORIES=@FREAD_READS_DIRECTORIES@
SNPRINTF_RETURNS_BOGUS=@SNPRINTF_RETURNS_BOGUS@
NO_PTHREADS=@NO_PTHREADS@
PTHREAD_LIBS=@PTHREAD_LIBS@

5
configure.ac
View File

@ -490,6 +490,8 @@ AC_SUBST(NO_MKDTEMP)
# Define NO_SYMLINK_HEAD if you never want .git/HEAD to be a symbolic link.
# Enable it on Windows. By default, symrefs are still used.
#
# Define NO_PTHREADS if we do not have pthreads
#
# Define PTHREAD_LIBS to the linker flag used for Pthread support.
AC_LANG_CONFTEST([AC_LANG_PROGRAM(
[[#include <pthread.h>]],
@ -502,9 +504,12 @@ else
${CC} -lpthread conftest.c -o conftest.o > /dev/null 2>&1
if test $? -eq 0;then
PTHREAD_LIBS="-lpthread"
else
NO_PTHREADS=UnfortunatelyYes
fi
fi
AC_SUBST(PTHREAD_LIBS)
AC_SUBST(NO_PTHREADS)
## Site configuration (override autodetection)
## --with-PACKAGE[=ARG] and --without-PACKAGE

9
preload-index.c
View File

@ -2,6 +2,14 @@
* Copyright (C) 2008 Linus Torvalds
*/
#include "cache.h"
#ifdef NO_PTHREADS
static void preload_index(struct index_state *index, const char **pathspec)
{
; /* nothing */
}
#else
#include <pthread.h>
/*
@ -81,6 +89,7 @@ static void preload_index(struct index_state *index, const char **pathspec)
die("unable to join threaded lstat");
}
}
#endif
int read_index_preload(struct index_state *index, const char **pathspec)
{