Makefile: fix default regex settings on Darwin

t0070-fundamental.sh fails on Mac OS X 10.8:

	$ uname -a
	Darwin lustrous 12.2.0 Darwin Kernel Version 12.2.0:
	Sat Aug 25 00:48:52 PDT 2012;
	root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64

	$ ./t0070-fundamental.sh -v
	fatal: regex bug confirmed: re-build git with NO_REGEX=1

Fix it by using Git's regex library.

Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
compate/clipped-write.c: large write(2) fails on Mac OS X/XNU

Due to a bug in the Darwin kernel, write(2) calls have a maximum size
of INT_MAX bytes.

Introduce a new compat function, clipped_write(), that only writes
at most INT_MAX bytes and returns the number of bytes written, as
a substitute for write(2), and allow platforms that need this to
enable it from the build mechanism with NEEDS_CLIPPED_WRITE.

Set it for Mac OS X by default.  It may be necessary to include this
function on Windows, too.

Signed-off-by: Filipe Cabecinhas <filcab+git@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Makefile: add support for Apple CommonCrypto facility

As of Mac OS X 10.7, Apple deprecated all OpenSSL functions due to
OpenSSL ABI instability, thus leading to build warnings.  As a
replacement, Apple encourages developers to migrate to its own (stable)
CommonCrypto facility.

Introduce boilerplate which controls whether Apple's CommonCrypto
facility is employed (enabled by default).  Also add a
NO_APPLE_COMMON_CRYPTO build flag with which the user can opt out to
use OpenSSL instead.

[es: extracted CommonCrypto-related Makefile boilerplate into separate
introductory patch]

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
cache.h: eliminate SHA-1 deprecation warnings on Mac OS X

As of Mac OS X 10.7, Apple deprecated all OpenSSL functions due to
OpenSSL ABI instability, thus leading to build diagnostics such as:

	warning: 'SHA1_Init' is deprecated
	(declared at /usr/include/openssl/sha.h:121)

Silence the warnings by using Apple's CommonCrypto SHA-1 replacement
functions for SHA1_Init(), SHA1_Update(), and SHA1_Final().

COMMON_DIGEST_FOR_OPENSSL is defined to instruct
<CommonCrypto/CommonDigest.h> to provide compatibility macros
associating OpenSSL SHA-1 functions with their CommonCrypto
counterparts.

[es: reworded commit message]

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
imap-send: eliminate HMAC deprecation warnings on Mac OS X

As of Mac OS X 10.7, Apple deprecated all OpenSSL functions due to
OpenSSL ABI instability.  Silence the warnings by using Apple's
CommonCrypto HMAC replacement functions.

[es: reworded commit message; check APPLE_COMMON_CRYPTO instead of
abusing COMMON_DIGEST_FOR_OPENSSL]

Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
test: spell 'ls-files --delete' option correctly in test descriptions

The option is spelled '--deleted'.

Signed-off-by: SZEDER Gábor <szeder@ira.uka.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
check-ignore doc: fix broken link to ls-files page

Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'da/darwin' into maint

Newer MacOS X encourages the programs to compile and link with their
CommonCrypto, not with OpenSSL.

* da/darwin:
  imap-send: eliminate HMAC deprecation warnings on Mac OS X
  cache.h: eliminate SHA-1 deprecation warnings on Mac OS X
  Makefile: add support for Apple CommonCrypto facility
  Makefile: fix default regex settings on Darwin
Merge branch 'fc/macos-x-clipped-write' into maint

Mac OS X does not like to write(2) more than INT_MAX number of
bytes; work it around by chopping write(2) into smaller pieces.

* fc/macos-x-clipped-write:
  compate/clipped-write.c: large write(2) fails on Mac OS X/XNU
Start preparing for 1.8.3.3

Signed-off-by: Junio C Hamano <gitster@pobox.com>