[PATCH v2 0/3] update sha1dc from PR #36

A v2 addressing comments to the v1, tbdiff below. Just fixes the subject line on 1/3 & gets rid of the redundant _BIG_ENDIAN detection for Solaris, we can just use __sparc (and indeed we did before this).

Junio C Hamano (1):
  sha1collisiondetection: automatically enable when submodule is
    populated

Ævar Arnfjörð Bjarmason (2):
  sha1dc: correct endian detection for Solaris (and others?)
  sha1dc: optionally use sha1collisiondetection as a submodule

 .gitmodules            |  4 +++
 Makefile               | 16 +++++++++++
 hash.h                 |  4 +++
 sha1collisiondetection |  1 +
 sha1dc/sha1.c          | 73 +++++++++++++++++++++++++++++++++++++-------------
 5 files changed, 79 insertions(+), 19 deletions(-)
 create mode 100644 .gitmodules
 create mode 160000 sha1collisiondetection

    @@ -1,6 +1,6 @@
     Author: Ævar Arnfjörð Bjarmason <avarab@gmail.com>

    -    sha1dc: update from my PR #36
    +    sha1dc: correct endian detection for Solaris (and others?)

         Update sha1dc from my PR #36[1] which'll hopefully be integrated by
         upstream soon.
    @@ -96,22 +96,15 @@
     +
     +#if defined(SHA1DC_ON_INTEL_LIKE_PROCESSOR)
     +/*
    -+ * As a last resort before we fall back on _BIG_ENDIAN or whatever
    -+ * else we're not 100% sure about below, we blacklist specific
    -+ * processors here. We could add more, see
    -+ * e.g. https://wiki.debian.org/ArchitectureSpecificsMemo
    ++ * As a last resort before we do anything else we're not 100% sure
    ++ * about below, we blacklist specific processors here. We could add
    ++ * more, see e.g. https://wiki.debian.org/ArchitectureSpecificsMemo
     + */
     +#else /* Not under GCC-alike or glibc or <processor whitelist>  or <processor blacklist> */
     +
    -+#ifdef _BIG_ENDIAN
    -+/*
    -+ * Solaris / illumos defines either _LITTLE_ENDIAN or _BIG_ENDIAN in
    -+ * <sys/isa_defs.h>.
    -+ */
    -+#define SHA1DC_BIGENDIAN
    -+#else
    ++/* We do nothing more here for now */
     +/*#error "Uncomment this to see if you fall through all the detection"*/
    -+#endif /* Big Endian because of _BIG_ENDIAN (Solaris)*/
    ++
     +#endif /* !SHA1DC_ON_INTEL_LIKE_PROCESSOR */
     +#endif /* Big Endian under whitelist of processors */
     +#endif /* Big Endian under glibc */
2: 63a5d0cb2a ! 2: 28750d3c24 sha1dc: optionally use sha1collisiondetection as a submodule
    @@ -79,4 +79,4 @@
     --- /dev/null
     +++ b/sha1collisiondetection
     @@
    -+Subproject commit 56ab30c4c998e1e7f3075705087a2f0c4c4202d7
    ++Subproject commit 9d3a0b3783afab335a1819543d039cf2980577bb