Revision 9de0834663f28bee9e6b2c4647ed6128241ed26f authored by Linus Torvalds on 17 October 2006, 02:58:54 UTC, committed by Junio C Hamano on 17 October 2006, 04:27:44 UTC
Jim Mayering noticed that xdiff library took insanely long time
when comparing files with many identical lines.

This was because the hash function used in the library is broken
on 64-bit architectures and caused too many collisions.

http://thread.gmane.org/gmane.comp.version-control.git/28962/focus=28994

Acked-by: Davide Libenzi <davidel@xmaliserver.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
1 parent 6fe5b7f
Raw File
Makefile
# The default target of this Makefile is...
all:

# Define MOZILLA_SHA1 environment variable when running make to make use of
# a bundled SHA1 routine coming from Mozilla. It is GPL'd and should be fast
# on non-x86 architectures (e.g. PowerPC), while the OpenSSL version (default
# choice) has very fast version optimized for i586.
#
# Define NO_OPENSSL environment variable if you do not have OpenSSL.
# This also implies MOZILLA_SHA1.
#
# Define NO_CURL if you do not have curl installed.  git-http-pull and
# git-http-push are not built, and you cannot use http:// and https://
# transports.
#
# Define CURLDIR=/foo/bar if your curl header and library files are in
# /foo/bar/include and /foo/bar/lib directories.
#
# Define NO_EXPAT if you do not have expat installed.  git-http-push is
# not built, and you cannot push using http:// and https:// transports.
#
# Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
#
# Define NO_D_TYPE_IN_DIRENT if your platform defines DT_UNKNOWN but lacks
# d_type in struct dirent (latest Cygwin -- will be fixed soonish).
#
# Define NO_C99_FORMAT if your formatted IO functions (printf/scanf et.al.)
# do not support the 'size specifiers' introduced by C99, namely ll, hh,
# j, z, t. (representing long long int, char, intmax_t, size_t, ptrdiff_t).
# some c compilers supported these specifiers prior to C99 as an extension.
#
# Define NO_STRCASESTR if you don't have strcasestr.
#
# Define NO_STRLCPY if you don't have strlcpy.
#
# Define NO_SETENV if you don't have setenv in the C library.
#
# 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_SVN_TESTS if you want to skip time-consuming SVN interoperability
# tests.  These tests take up a significant amount of the total test time
# but are not needed unless you plan to talk to SVN repos.
#
# Define NO_FINK if you are building on Darwin/Mac OS X, have Fink
# installed in /sw, but don't want GIT to link against any libraries
# installed there.  If defined you may specify your own (or Fink's)
# include directories and library directories by defining CFLAGS
# and LDFLAGS appropriately.
#
# Define NO_DARWIN_PORTS if you are building on Darwin/Mac OS X,
# have DarwinPorts installed in /opt/local, but don't want GIT to
# link against any libraries installed there.  If defined you may
# specify your own (or DarwinPort's) include directories and
# library directories by defining CFLAGS and LDFLAGS appropriately.
#
# Define PPC_SHA1 environment variable when running make to make use of
# a bundled SHA1 routine optimized for PowerPC.
#
# Define ARM_SHA1 environment variable when running make to make use of
# a bundled SHA1 routine optimized for ARM.
#
# Define NEEDS_SSL_WITH_CRYPTO if you need -lcrypto with -lssl (Darwin).
#
# Define NEEDS_LIBICONV if linking with libc is not enough (Darwin).
#
# Define NEEDS_SOCKET if linking with libc is not enough (SunOS,
# Patrick Mauritz).
#
# Define NO_MMAP if you want to avoid mmap.
#
# Define WITH_OWN_SUBPROCESS_PY if you want to use with python 2.3.
#
# Define NO_IPV6 if you lack IPv6 support and getaddrinfo().
#
# Define NO_SOCKADDR_STORAGE if your platform does not have struct
# sockaddr_storage.
#
# Define NO_ICONV if your libc does not properly support iconv.
#
# Define NO_ACCURATE_DIFF if your diff program at least sometimes misses
# a missing newline at the end of the file.
#
# Define NO_PYTHON if you want to lose all benefits of the recursive merge.
#
# Define COLLISION_CHECK below if you believe that SHA1's
# 1461501637330902918203684832716283019655932542976 hashes do not give you
# sufficient guarantee that no collisions between objects will ever happen.

# Define USE_NSEC below if you want git to care about sub-second file mtimes
# and ctimes. Note that you need recent glibc (at least 2.2.4) for this, and
# it will BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely
# randomly break unless your underlying filesystem supports those sub-second
# times (my ext3 doesn't).

# Define USE_STDEV below if you want git to care about the underlying device
# change being considered an inode change from the update-cache perspective.

GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
	@$(SHELL_PATH) ./GIT-VERSION-GEN
-include GIT-VERSION-FILE

uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not')
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')

# CFLAGS and LDFLAGS are for the users to override from the command line.

CFLAGS = -g -O2 -Wall
LDFLAGS =
ALL_CFLAGS = $(CFLAGS)
ALL_LDFLAGS = $(LDFLAGS)
STRIP ?= strip

prefix = $(HOME)
bindir = $(prefix)/bin
gitexecdir = $(bindir)
template_dir = $(prefix)/share/git-core/templates/
GIT_PYTHON_DIR = $(prefix)/share/git-core/python
# DESTDIR=

export prefix bindir gitexecdir template_dir GIT_PYTHON_DIR

CC = gcc
AR = ar
TAR = tar
INSTALL = install
RPMBUILD = rpmbuild

# sparse is architecture-neutral, which means that we need to tell it
# explicitly what architecture to check for. Fix this up for yours..
SPARSE_FLAGS = -D__BIG_ENDIAN__ -D__powerpc__



### --- END CONFIGURATION SECTION ---

SCRIPT_SH = \
	git-bisect.sh git-branch.sh git-checkout.sh \
	git-cherry.sh git-clean.sh git-clone.sh git-commit.sh \
	git-fetch.sh \
	git-ls-remote.sh \
	git-merge-one-file.sh git-parse-remote.sh \
	git-pull.sh git-rebase.sh \
	git-repack.sh git-request-pull.sh git-reset.sh \
	git-resolve.sh git-revert.sh git-sh-setup.sh \
	git-tag.sh git-verify-tag.sh \
	git-applymbox.sh git-applypatch.sh git-am.sh \
	git-merge.sh git-merge-stupid.sh git-merge-octopus.sh \
	git-merge-resolve.sh git-merge-ours.sh \
	git-lost-found.sh git-quiltimport.sh

SCRIPT_PERL = \
	git-archimport.perl git-cvsimport.perl git-relink.perl \
	git-shortlog.perl git-rerere.perl \
	git-annotate.perl git-cvsserver.perl \
	git-svnimport.perl git-cvsexportcommit.perl \
	git-send-email.perl git-svn.perl

SCRIPT_PYTHON = \
	git-merge-recursive.py

SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \
	  $(patsubst %.perl,%,$(SCRIPT_PERL)) \
	  $(patsubst %.py,%,$(SCRIPT_PYTHON)) \
	  git-cherry-pick git-status git-instaweb

# The ones that do not have to link with lcrypto, lz nor xdiff.
SIMPLE_PROGRAMS = \
	git-daemon$X

# ... and all the rest that could be moved out of bindir to gitexecdir
PROGRAMS = \
	git-checkout-index$X \
	git-convert-objects$X git-fetch-pack$X git-fsck-objects$X \
	git-hash-object$X git-index-pack$X git-local-fetch$X \
	git-merge-base$X \
	git-merge-index$X git-mktag$X git-mktree$X git-pack-objects$X git-patch-id$X \
	git-peek-remote$X git-receive-pack$X \
	git-send-pack$X git-shell$X \
	git-show-index$X git-ssh-fetch$X \
	git-ssh-upload$X git-unpack-file$X \
	git-unpack-objects$X git-update-server-info$X \
	git-upload-pack$X git-verify-pack$X \
	git-symbolic-ref$X \
	git-name-rev$X git-pack-redundant$X git-var$X \
	git-describe$X git-merge-tree$X git-blame$X git-imap-send$X

BUILT_INS = git-log$X git-whatchanged$X git-show$X git-update-ref$X \
	git-count-objects$X git-diff$X git-push$X git-mailsplit$X \
	git-grep$X git-add$X git-rm$X git-rev-list$X git-stripspace$X \
	git-check-ref-format$X git-rev-parse$X git-mailinfo$X \
	git-init-db$X git-tar-tree$X git-upload-tar$X git-format-patch$X \
	git-ls-files$X git-ls-tree$X git-get-tar-commit-id$X \
	git-read-tree$X git-commit-tree$X git-write-tree$X \
	git-apply$X git-show-branch$X git-diff-files$X git-update-index$X \
	git-diff-index$X git-diff-stages$X git-diff-tree$X git-cat-file$X \
	git-fmt-merge-msg$X git-prune$X git-mv$X git-prune-packed$X \
	git-repo-config$X

# what 'all' will build and 'install' will install, in gitexecdir
ALL_PROGRAMS = $(PROGRAMS) $(SIMPLE_PROGRAMS) $(SCRIPTS)

# Backward compatibility -- to be removed after 1.0
PROGRAMS += git-ssh-pull$X git-ssh-push$X

# Set paths to tools early so that they can be used for version tests.
ifndef SHELL_PATH
	SHELL_PATH = /bin/sh
endif
ifndef PERL_PATH
	PERL_PATH = /usr/bin/perl
endif
ifndef PYTHON_PATH
	PYTHON_PATH = /usr/bin/python
endif

PYMODULES = \
	gitMergeCommon.py

LIB_FILE=libgit.a
XDIFF_LIB=xdiff/lib.a

LIB_H = \
	blob.h cache.h commit.h csum-file.h delta.h \
	diff.h object.h pack.h pkt-line.h quote.h refs.h \
	run-command.h strbuf.h tag.h tree.h git-compat-util.h revision.h \
	tree-walk.h log-tree.h dir.h path-list.h

DIFF_OBJS = \
	diff.o diff-lib.o diffcore-break.o diffcore-order.o \
	diffcore-pickaxe.o diffcore-rename.o tree-diff.o combine-diff.o \
	diffcore-delta.o log-tree.o

LIB_OBJS = \
	blob.o commit.o connect.o csum-file.o cache-tree.o base85.o \
	date.o diff-delta.o entry.o exec_cmd.o ident.o lockfile.o \
	object.o pack-check.o patch-delta.o path.o pkt-line.o \
	quote.o read-cache.o refs.o run-command.o dir.o object-refs.o \
	server-info.o setup.o sha1_file.o sha1_name.o strbuf.o \
	tag.o tree.o usage.o config.o environment.o ctype.o copy.o \
	fetch-clone.o revision.o pager.o tree-walk.o xdiff-interface.o \
	alloc.o merge-file.o path-list.o $(DIFF_OBJS)

BUILTIN_OBJS = \
	builtin-log.o builtin-help.o builtin-count.o builtin-diff.o builtin-push.o \
	builtin-grep.o builtin-add.o builtin-rev-list.o builtin-check-ref-format.o \
	builtin-rm.o builtin-init-db.o builtin-rev-parse.o \
	builtin-tar-tree.o builtin-upload-tar.o builtin-update-index.o \
	builtin-ls-files.o builtin-ls-tree.o builtin-write-tree.o \
	builtin-read-tree.o builtin-commit-tree.o builtin-mailinfo.o \
	builtin-apply.o builtin-show-branch.o builtin-diff-files.o \
	builtin-diff-index.o builtin-diff-stages.o builtin-diff-tree.o \
	builtin-cat-file.o builtin-mailsplit.o builtin-stripspace.o \
	builtin-update-ref.o builtin-fmt-merge-msg.o builtin-prune.o \
	builtin-mv.o builtin-prune-packed.o builtin-repo-config.o

GITLIBS = $(LIB_FILE) $(XDIFF_LIB)
LIBS = $(GITLIBS) -lz

#
# Platform specific tweaks
#

# We choose to avoid "if .. else if .. else .. endif endif"
# because maintaining the nesting to match is a pain.  If
# we had "elif" things would have been much nicer...

ifeq ($(uname_S),Linux)
	NO_STRLCPY = YesPlease
endif
ifeq ($(uname_S),GNU/kFreeBSD)
	NO_STRLCPY = YesPlease
endif
ifeq ($(uname_S),Darwin)
	NEEDS_SSL_WITH_CRYPTO = YesPlease
	NEEDS_LIBICONV = YesPlease
	NO_STRLCPY = YesPlease
	ifndef NO_FINK
		ifeq ($(shell test -d /sw/lib && echo y),y)
			ALL_CFLAGS += -I/sw/include
			ALL_LDFLAGS += -L/sw/lib
		endif
	endif
	ifndef NO_DARWIN_PORTS
		ifeq ($(shell test -d /opt/local/lib && echo y),y)
			ALL_CFLAGS += -I/opt/local/include
			ALL_LDFLAGS += -L/opt/local/lib
		endif
	endif
endif
ifeq ($(uname_S),SunOS)
	NEEDS_SOCKET = YesPlease
	NEEDS_NSL = YesPlease
	SHELL_PATH = /bin/bash
	NO_STRCASESTR = YesPlease
	NO_STRLCPY = YesPlease
	ifeq ($(uname_R),5.8)
		NEEDS_LIBICONV = YesPlease
		NO_UNSETENV = YesPlease
		NO_SETENV = YesPlease
		NO_C99_FORMAT = YesPlease
	endif
	ifeq ($(uname_R),5.9)
		NO_UNSETENV = YesPlease
		NO_SETENV = YesPlease
		NO_C99_FORMAT = YesPlease
	endif
	INSTALL = ginstall
	TAR = gtar
	ALL_CFLAGS += -D__EXTENSIONS__
endif
ifeq ($(uname_O),Cygwin)
	NO_D_TYPE_IN_DIRENT = YesPlease
	NO_D_INO_IN_DIRENT = YesPlease
	NO_STRCASESTR = YesPlease
	NO_SYMLINK_HEAD = YesPlease
	NEEDS_LIBICONV = YesPlease
	NO_C99_FORMAT = YesPlease
	# There are conflicting reports about this.
	# On some boxes NO_MMAP is needed, and not so elsewhere.
	# Try uncommenting this if you see things break -- YMMV.
	# NO_MMAP = YesPlease
	NO_IPV6 = YesPlease
	X = .exe
endif
ifeq ($(uname_S),FreeBSD)
	NEEDS_LIBICONV = YesPlease
	ALL_CFLAGS += -I/usr/local/include
	ALL_LDFLAGS += -L/usr/local/lib
endif
ifeq ($(uname_S),OpenBSD)
	NO_STRCASESTR = YesPlease
	NEEDS_LIBICONV = YesPlease
	ALL_CFLAGS += -I/usr/local/include
	ALL_LDFLAGS += -L/usr/local/lib
endif
ifeq ($(uname_S),NetBSD)
	ifeq ($(shell expr "$(uname_R)" : '[01]\.'),2)
		NEEDS_LIBICONV = YesPlease
	endif
	ALL_CFLAGS += -I/usr/pkg/include
	ALL_LDFLAGS += -L/usr/pkg/lib -Wl,-rpath,/usr/pkg/lib
endif
ifeq ($(uname_S),AIX)
	NO_STRCASESTR=YesPlease
	NO_STRLCPY = YesPlease
	NEEDS_LIBICONV=YesPlease
endif
ifeq ($(uname_S),IRIX64)
	NO_IPV6=YesPlease
	NO_SETENV=YesPlease
	NO_STRCASESTR=YesPlease
	NO_STRLCPY = YesPlease
	NO_SOCKADDR_STORAGE=YesPlease
	SHELL_PATH=/usr/gnu/bin/bash
	ALL_CFLAGS += -DPATH_MAX=1024
	# for now, build 32-bit version
	ALL_LDFLAGS += -L/usr/lib32
endif
ifneq (,$(findstring arm,$(uname_M)))
	ARM_SHA1 = YesPlease
endif

-include config.mak.autogen
-include config.mak

ifdef WITH_OWN_SUBPROCESS_PY
	PYMODULES += compat/subprocess.py
else
	ifeq ($(NO_PYTHON),)
		ifneq ($(shell $(PYTHON_PATH) -c 'import subprocess;print"OK"' 2>/dev/null),OK)
			PYMODULES += compat/subprocess.py
		endif
	endif
endif

ifndef NO_CURL
	ifdef CURLDIR
		# This is still problematic -- gcc does not always want -R.
		ALL_CFLAGS += -I$(CURLDIR)/include
		CURL_LIBCURL = -L$(CURLDIR)/lib -R$(CURLDIR)/lib -lcurl
	else
		CURL_LIBCURL = -lcurl
	endif
	PROGRAMS += git-http-fetch$X
	curl_check := $(shell (echo 070908; curl-config --vernum) | sort -r | sed -ne 2p)
	ifeq "$(curl_check)" "070908"
		ifndef NO_EXPAT
			PROGRAMS += git-http-push$X
		endif
	endif
	ifndef NO_EXPAT
		EXPAT_LIBEXPAT = -lexpat
	endif
endif

ifndef NO_OPENSSL
	OPENSSL_LIBSSL = -lssl
	ifdef OPENSSLDIR
		# Again this may be problematic -- gcc does not always want -R.
		ALL_CFLAGS += -I$(OPENSSLDIR)/include
		OPENSSL_LINK = -L$(OPENSSLDIR)/lib -R$(OPENSSLDIR)/lib
	else
		OPENSSL_LINK =
	endif
else
	ALL_CFLAGS += -DNO_OPENSSL
	MOZILLA_SHA1 = 1
	OPENSSL_LIBSSL =
endif
ifdef NEEDS_SSL_WITH_CRYPTO
	LIB_4_CRYPTO = $(OPENSSL_LINK) -lcrypto -lssl
else
	LIB_4_CRYPTO = $(OPENSSL_LINK) -lcrypto
endif
ifdef NEEDS_LIBICONV
	ifdef ICONVDIR
		# Again this may be problematic -- gcc does not always want -R.
		ALL_CFLAGS += -I$(ICONVDIR)/include
		ICONV_LINK = -L$(ICONVDIR)/lib -R$(ICONVDIR)/lib
	else
		ICONV_LINK =
	endif
	LIBS += $(ICONV_LINK) -liconv
endif
ifdef NEEDS_SOCKET
	LIBS += -lsocket
	SIMPLE_LIB += -lsocket
endif
ifdef NEEDS_NSL
	LIBS += -lnsl
	SIMPLE_LIB += -lnsl
endif
ifdef NO_D_TYPE_IN_DIRENT
	ALL_CFLAGS += -DNO_D_TYPE_IN_DIRENT
endif
ifdef NO_D_INO_IN_DIRENT
	ALL_CFLAGS += -DNO_D_INO_IN_DIRENT
endif
ifdef NO_C99_FORMAT
	ALL_CFLAGS += -DNO_C99_FORMAT
endif
ifdef NO_SYMLINK_HEAD
	ALL_CFLAGS += -DNO_SYMLINK_HEAD
endif
ifdef NO_STRCASESTR
	COMPAT_CFLAGS += -DNO_STRCASESTR
	COMPAT_OBJS += compat/strcasestr.o
endif
ifdef NO_STRLCPY
	COMPAT_CFLAGS += -DNO_STRLCPY
	COMPAT_OBJS += compat/strlcpy.o
endif
ifdef NO_SETENV
	COMPAT_CFLAGS += -DNO_SETENV
	COMPAT_OBJS += compat/setenv.o
endif
ifdef NO_SETENV
	COMPAT_CFLAGS += -DNO_UNSETENV
	COMPAT_OBJS += compat/unsetenv.o
endif
ifdef NO_MMAP
	COMPAT_CFLAGS += -DNO_MMAP
	COMPAT_OBJS += compat/mmap.o
endif
ifdef NO_IPV6
	ALL_CFLAGS += -DNO_IPV6
endif
ifdef NO_SOCKADDR_STORAGE
ifdef NO_IPV6
	ALL_CFLAGS += -Dsockaddr_storage=sockaddr_in
else
	ALL_CFLAGS += -Dsockaddr_storage=sockaddr_in6
endif
endif
ifdef NO_INET_NTOP
	LIB_OBJS += compat/inet_ntop.o
endif

ifdef NO_ICONV
	ALL_CFLAGS += -DNO_ICONV
endif

ifdef PPC_SHA1
	SHA1_HEADER = "ppc/sha1.h"
	LIB_OBJS += ppc/sha1.o ppc/sha1ppc.o
else
ifdef ARM_SHA1
	SHA1_HEADER = "arm/sha1.h"
	LIB_OBJS += arm/sha1.o arm/sha1_arm.o
else
ifdef MOZILLA_SHA1
	SHA1_HEADER = "mozilla-sha1/sha1.h"
	LIB_OBJS += mozilla-sha1/sha1.o
else
	SHA1_HEADER = <openssl/sha.h>
	LIBS += $(LIB_4_CRYPTO)
endif
endif
endif
ifdef NO_ACCURATE_DIFF
	ALL_CFLAGS += -DNO_ACCURATE_DIFF
endif

# Shell quote (do not use $(call) to accommodate ancient setups);

SHA1_HEADER_SQ = $(subst ','\'',$(SHA1_HEADER))

DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
bindir_SQ = $(subst ','\'',$(bindir))
gitexecdir_SQ = $(subst ','\'',$(gitexecdir))
template_dir_SQ = $(subst ','\'',$(template_dir))
prefix_SQ = $(subst ','\'',$(prefix))

SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
PERL_PATH_SQ = $(subst ','\'',$(PERL_PATH))
PYTHON_PATH_SQ = $(subst ','\'',$(PYTHON_PATH))
GIT_PYTHON_DIR_SQ = $(subst ','\'',$(GIT_PYTHON_DIR))

ALL_CFLAGS += -DSHA1_HEADER='$(SHA1_HEADER_SQ)' $(COMPAT_CFLAGS)
LIB_OBJS += $(COMPAT_OBJS)
export prefix TAR INSTALL DESTDIR SHELL_PATH template_dir
### Build rules

all: $(ALL_PROGRAMS) $(BUILT_INS) git$X gitk

all:
	$(MAKE) -C templates

strip: $(PROGRAMS) git$X
	$(STRIP) $(STRIP_OPTS) $(PROGRAMS) git$X

git$X: git.c common-cmds.h $(BUILTIN_OBJS) $(GITLIBS) GIT-CFLAGS
	$(CC) -DGIT_VERSION='"$(GIT_VERSION)"' \
		$(ALL_CFLAGS) -o $@ $(filter %.c,$^) \
		$(BUILTIN_OBJS) $(ALL_LDFLAGS) $(LIBS)

builtin-help.o: common-cmds.h

$(BUILT_INS): git$X
	rm -f $@ && ln git$X $@

common-cmds.h: Documentation/git-*.txt
	./generate-cmdlist.sh > $@+
	mv $@+ $@

$(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
	rm -f $@ $@+
	sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
	    -e 's|@@PERL@@|$(PERL_PATH_SQ)|g' \
	    -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
	    -e 's/@@NO_CURL@@/$(NO_CURL)/g' \
	    -e 's/@@NO_PYTHON@@/$(NO_PYTHON)/g' \
	    $@.sh >$@+
	chmod +x $@+
	mv $@+ $@

$(patsubst %.perl,%,$(SCRIPT_PERL)) : % : %.perl
	rm -f $@ $@+
	sed -e '1s|#!.*perl|#!$(PERL_PATH_SQ)|' \
	    -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
	    $@.perl >$@+
	chmod +x $@+
	mv $@+ $@

$(patsubst %.py,%,$(SCRIPT_PYTHON)) : % : %.py GIT-CFLAGS
	rm -f $@ $@+
	sed -e '1s|#!.*python|#!$(PYTHON_PATH_SQ)|' \
	    -e 's|@@GIT_PYTHON_PATH@@|$(GIT_PYTHON_DIR_SQ)|g' \
	    -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
	    $@.py >$@+
	chmod +x $@+
	mv $@+ $@

git-cherry-pick: git-revert
	cp $< $@+
	mv $@+ $@

git-status: git-commit
	cp $< $@+
	mv $@+ $@

git-instaweb: git-instaweb.sh gitweb/gitweb.cgi gitweb/gitweb.css
	rm -f $@ $@+
	sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
	    -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
	    -e 's/@@NO_CURL@@/$(NO_CURL)/g' \
	    -e 's/@@NO_PYTHON@@/$(NO_PYTHON)/g' \
	    -e '/@@GITWEB_CGI@@/r gitweb/gitweb.cgi' \
	    -e '/@@GITWEB_CGI@@/d' \
	    -e '/@@GITWEB_CSS@@/r gitweb/gitweb.css' \
	    -e '/@@GITWEB_CSS@@/d' \
	    $@.sh | sed "s|/usr/bin/git|$(bindir)/git|" > $@+
	chmod +x $@+
	mv $@+ $@

# These can record GIT_VERSION
git$X git.spec \
	$(patsubst %.sh,%,$(SCRIPT_SH)) \
	$(patsubst %.perl,%,$(SCRIPT_PERL)) \
	$(patsubst %.py,%,$(SCRIPT_PYTHON)) \
	: GIT-VERSION-FILE

%.o: %.c GIT-CFLAGS
	$(CC) -o $*.o -c $(ALL_CFLAGS) $<
%.o: %.S
	$(CC) -o $*.o -c $(ALL_CFLAGS) $<

exec_cmd.o: exec_cmd.c GIT-CFLAGS
	$(CC) -o $*.o -c $(ALL_CFLAGS) '-DGIT_EXEC_PATH="$(gitexecdir_SQ)"' $<
builtin-init-db.o: builtin-init-db.c GIT-CFLAGS
	$(CC) -o $*.o -c $(ALL_CFLAGS) -DDEFAULT_GIT_TEMPLATE_DIR='"$(template_dir_SQ)"' $<

http.o: http.c GIT-CFLAGS
	$(CC) -o $*.o -c $(ALL_CFLAGS) -DGIT_USER_AGENT='"git/$(GIT_VERSION)"' $<

ifdef NO_EXPAT
http-fetch.o: http-fetch.c http.h GIT-CFLAGS
	$(CC) -o $*.o -c $(ALL_CFLAGS) -DNO_EXPAT $<
endif

git-%$X: %.o $(GITLIBS)
	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)

$(SIMPLE_PROGRAMS) : $(LIB_FILE)
$(SIMPLE_PROGRAMS) : git-%$X : %.o
	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
		$(LIB_FILE) $(SIMPLE_LIB)

ssh-pull.o: ssh-fetch.c
ssh-push.o: ssh-upload.c
git-local-fetch$X: fetch.o
git-ssh-fetch$X: rsh.o fetch.o
git-ssh-upload$X: rsh.o
git-ssh-pull$X: rsh.o fetch.o
git-ssh-push$X: rsh.o

git-imap-send$X: imap-send.o $(LIB_FILE)

http.o http-fetch.o http-push.o: http.h
git-http-fetch$X: fetch.o http.o http-fetch.o $(GITLIBS)
	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
		$(LIBS) $(CURL_LIBCURL) $(EXPAT_LIBEXPAT)

git-http-push$X: revision.o http.o http-push.o $(GITLIBS)
	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
		$(LIBS) $(CURL_LIBCURL) $(EXPAT_LIBEXPAT)

$(LIB_OBJS) $(BUILTIN_OBJS): $(LIB_H)
$(patsubst git-%$X,%.o,$(PROGRAMS)): $(LIB_H) $(wildcard */*.h)
$(DIFF_OBJS): diffcore.h

$(LIB_FILE): $(LIB_OBJS)
	rm -f $@ && $(AR) rcs $@ $(LIB_OBJS)

XDIFF_OBJS=xdiff/xdiffi.o xdiff/xprepare.o xdiff/xutils.o xdiff/xemit.o

$(XDIFF_LIB): $(XDIFF_OBJS)
	rm -f $@ && $(AR) rcs $@ $(XDIFF_OBJS)


doc:
	$(MAKE) -C Documentation all

TAGS:
	rm -f TAGS
	find . -name '*.[hcS]' -print | xargs etags -a

tags:
	rm -f tags
	find . -name '*.[hcS]' -print | xargs ctags -a

### Detect prefix changes
TRACK_CFLAGS = $(subst ','\'',$(ALL_CFLAGS)):$(GIT_PYTHON_DIR_SQ):\
             $(bindir_SQ):$(gitexecdir_SQ):$(template_dir_SQ):$(prefix_SQ)

GIT-CFLAGS: .FORCE-GIT-CFLAGS
	@FLAGS='$(TRACK_CFLAGS)'; \
	    if test x"$$FLAGS" != x"`cat GIT-CFLAGS 2>/dev/null`" ; then \
		echo 1>&2 "    * new build flags or prefix"; \
		echo "$$FLAGS" >GIT-CFLAGS; \
            fi

### Testing rules

# GNU make supports exporting all variables by "export" without parameters.
# However, the environment gets quite big, and some programs have problems
# with that.

export NO_PYTHON
export NO_SVN_TESTS

test: all
	$(MAKE) -C t/ all

test-date$X: test-date.c date.o ctype.o
	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) test-date.c date.o ctype.o

test-delta$X: test-delta.c diff-delta.o patch-delta.o
	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $^

test-dump-cache-tree$X: dump-cache-tree.o $(GITLIBS)
	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)

test-sha1$X: test-sha1.o $(GITLIBS)
	$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(LIBS)

check-sha1:: test-sha1$X
	./test-sha1.sh

check:
	for i in *.c; do sparse $(ALL_CFLAGS) $(SPARSE_FLAGS) $$i || exit; done



### Installation rules

install: all
	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(bindir_SQ)'
	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(gitexecdir_SQ)'
	$(INSTALL) $(ALL_PROGRAMS) '$(DESTDIR_SQ)$(gitexecdir_SQ)'
	$(INSTALL) git$X gitk '$(DESTDIR_SQ)$(bindir_SQ)'
	$(MAKE) -C templates DESTDIR='$(DESTDIR_SQ)' install
	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(GIT_PYTHON_DIR_SQ)'
	$(INSTALL) $(PYMODULES) '$(DESTDIR_SQ)$(GIT_PYTHON_DIR_SQ)'
	if test 'z$(bindir_SQ)' != 'z$(gitexecdir_SQ)'; \
	then \
		ln -f '$(DESTDIR_SQ)$(bindir_SQ)/git$X' \
			'$(DESTDIR_SQ)$(gitexecdir_SQ)/git$X' || \
		cp '$(DESTDIR_SQ)$(bindir_SQ)/git$X' \
			'$(DESTDIR_SQ)$(gitexecdir_SQ)/git$X'; \
	fi
	$(foreach p,$(BUILT_INS), rm -f '$(DESTDIR_SQ)$(gitexecdir_SQ)/$p' && ln '$(DESTDIR_SQ)$(gitexecdir_SQ)/git$X' '$(DESTDIR_SQ)$(gitexecdir_SQ)/$p' ;)

install-doc:
	$(MAKE) -C Documentation install




### Maintainer's dist rules

git.spec: git.spec.in
	sed -e 's/@@VERSION@@/$(GIT_VERSION)/g' < $< > $@+
	mv $@+ $@

GIT_TARNAME=git-$(GIT_VERSION)
dist: git.spec git-tar-tree
	./git-tar-tree HEAD^{tree} $(GIT_TARNAME) > $(GIT_TARNAME).tar
	@mkdir -p $(GIT_TARNAME)
	@cp git.spec $(GIT_TARNAME)
	@echo $(GIT_VERSION) > $(GIT_TARNAME)/version
	$(TAR) rf $(GIT_TARNAME).tar \
		$(GIT_TARNAME)/git.spec $(GIT_TARNAME)/version
	@rm -rf $(GIT_TARNAME)
	gzip -f -9 $(GIT_TARNAME).tar

rpm: dist
	$(RPMBUILD) -ta $(GIT_TARNAME).tar.gz

htmldocs = git-htmldocs-$(GIT_VERSION)
manpages = git-manpages-$(GIT_VERSION)
dist-doc:
	rm -fr .doc-tmp-dir
	mkdir .doc-tmp-dir
	$(MAKE) -C Documentation WEBDOC_DEST=../.doc-tmp-dir install-webdoc
	cd .doc-tmp-dir && $(TAR) cf ../$(htmldocs).tar .
	gzip -n -9 -f $(htmldocs).tar
	:
	rm -fr .doc-tmp-dir
	mkdir .doc-tmp-dir .doc-tmp-dir/man1 .doc-tmp-dir/man7
	$(MAKE) -C Documentation DESTDIR=./ \
		man1dir=../.doc-tmp-dir/man1 \
		man7dir=../.doc-tmp-dir/man7 \
		install
	cd .doc-tmp-dir && $(TAR) cf ../$(manpages).tar .
	gzip -n -9 -f $(manpages).tar
	rm -fr .doc-tmp-dir

### Cleaning rules

clean:
	rm -f *.o mozilla-sha1/*.o arm/*.o ppc/*.o compat/*.o xdiff/*.o \
		$(LIB_FILE) $(XDIFF_LIB)
	rm -f $(ALL_PROGRAMS) $(BUILT_INS) git$X
	rm -f *.spec *.pyc *.pyo */*.pyc */*.pyo common-cmds.h TAGS tags
	rm -rf autom4te.cache
	rm -f config.log config.mak.autogen configure config.status config.cache
	rm -rf $(GIT_TARNAME) .doc-tmp-dir
	rm -f $(GIT_TARNAME).tar.gz git-core_$(GIT_VERSION)-*.tar.gz
	rm -f $(htmldocs).tar.gz $(manpages).tar.gz
	$(MAKE) -C Documentation/ clean
	$(MAKE) -C templates clean
	$(MAKE) -C t/ clean
	rm -f GIT-VERSION-FILE GIT-CFLAGS

.PHONY: all install clean strip
.PHONY: .FORCE-GIT-VERSION-FILE TAGS tags .FORCE-GIT-CFLAGS

### Check documentation
#
check-docs::
	@for v in $(ALL_PROGRAMS) $(BUILT_INS) git$X gitk; \
	do \
		case "$$v" in \
		git-merge-octopus | git-merge-ours | git-merge-recursive | \
		git-merge-resolve | git-merge-stupid | \
		git-ssh-pull | git-ssh-push ) continue ;; \
		esac ; \
		test -f "Documentation/$$v.txt" || \
		echo "no doc: $$v"; \
		grep -q "^gitlink:$$v\[[0-9]\]::" Documentation/git.txt || \
		case "$$v" in \
		git) ;; \
		*) echo "no link: $$v";; \
		esac ; \
	done | sort
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