Use libcrypto's checksum implementations if available, for speed.

On commonly used platform libcrypto uses architecture-specific
assembly code, which is significantly faster than the C code we
were using.  See Pádraig Brady's note in
<http://lists.gnu.org/archive/html/bug-gnulib/2013-12/msg00000.html>.
Merge from gnulib, incorporating:
2013-12-07 md5, sha1, sha256, sha512: add gl_SET_CRYPTO_CHECK_DEFAULT
2013-12-07 md5, sha1, sha256, sha512: add 'auto', and set-default method
2013-12-04 include_next: minimize code duplication
2013-12-03 md5, sha1, sha256, sha512: support mandating use of openssl
2013-12-02 md5, sha1, sha256, sha512: use openssl routines if available
* configure.ac (--without-all): Set with_openssl_default too.
Use gl_SET_CRYPTO_CHECK_DEFAULT to default to 'auto'.
(HAVE_LIB_CRYPTO): New var.
Say whether Emacs is configured to use a crypto library.
* lib/gl_openssl.h, m4/absolute-header.m4, m4/gl-openssl.m4:
New files, copied from gnulib.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* lib/md5.c, lib/md5.h, lib/sha1.c, lib/sha1.h:
* lib/sha256.c, lib/sha256.h, lib/sha512.c, lib/sha512.h:
* m4/include_next.m4, m4/md5.m4, m4/sha1.m4, m4/sha256.m4, m4/sha512.m4:
Update from gnulib.
* src/Makefile.in (LIB_CRYPTO): New macro.
(LIBES): Use it.

2 files changed, 6 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 5daf1dc5a7c..1eba6bb71c4 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,9 @@
 2013-12-08  Paul Eggert  <eggert@cs.ucla.edu>
 
+        Use libcrypto's checksum implementations if available, for speed.
+        * Makefile.in (LIB_CRYPTO): New macro.
+        (LIBES): Use it.
+
         * frame.h (SET_FRAME_VISIBLE): Now an inline function.
         The macro didn't conform to C99 due to type mismatch,
         which caused compilation failure with Sun C 5.12,
diff --git a/src/Makefile.in b/src/Makefile.in
index 7d91928acfe..cef1ba5ed2e 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -139,6 +139,7 @@ M17N_FLT_LIBS = @M17N_FLT_LIBS@
 
 LIB_ACL=@LIB_ACL@
 LIB_CLOCK_GETTIME=@LIB_CLOCK_GETTIME@
+LIB_CRYPTO=@LIB_CRYPTO@
 LIB_EACCESS=@LIB_EACCESS@
 LIB_FDATASYNC=@LIB_FDATASYNC@
 LIB_TIMER_TIME=@LIB_TIMER_TIME@
@@ -403,6 +404,7 @@ ALLOBJS = $(FIRSTFILE_OBJ) $(VMLIMIT_OBJ) $(obj) $(otherobj)
 LIBES = $(LIBS) $(W32_LIBS) $(LIBS_GNUSTEP) $(LIBX_BASE) $(LIBIMAGE) \
    $(LIBX_OTHER) $(LIBSOUND) \
    $(RSVG_LIBS) $(IMAGEMAGICK_LIBS) $(LIB_ACL) $(LIB_CLOCK_GETTIME) \
+   $(LIB_CRYPTO) \
    $(LIB_EACCESS) $(LIB_FDATASYNC) $(LIB_TIMER_TIME) $(DBUS_LIBS) \
    $(LIB_EXECINFO) $(XRANDR_LIBS) $(XINERAMA_LIBS) \
    $(LIBXML2_LIBS) $(LIBGPM) $(LIBRESOLV) $(LIBS_SYSTEM) \