Deb Packaging fixes: Build against Mozilla libs for Debian, conflict with "git"

This patch includes two fixes to the git-core Debian package:

    * Conflict with the GNU Interactive Tools package, which _also_
      wants to install /usr/bin/git.

    * Compile against the unencumbered Mozilla SHA1 code, instead of
      the iffy OpenSSL code, as much as possible.  This makes it easier to get
      the package included for distribution with Debian.

This has been based upon the original patch by Sebastian Kuzminsky
<seb@highlab.com>, but has been fixed up based upon feedback.

Signed-off-by: Ryan Anderson <ryan@michonline.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

debian/changelog

@@ -1,3 +1,13 @@
+git-core (0.99-2) unstable; urgency=low
+
+  * Conflict with the GNU Interactive Tools package, which also installs
+    /usr/bin/git.
+  * Use the Mozilla SHA1 code and/or the PPC assembly in preference to
+    OpenSSL.  This is only a partial fix for the license issues with OpenSSL.
+  * Minor tweaks to the Depends.
+
+ -- Ryan Anderson <ryan@michonline.com>  Sat, 23 Jul 2005 14:15:00 -0400
+
 git-core (0.99-1) unstable; urgency=low
 
   * Update deb package support to build correctly. 

debian/control

@@ -7,7 +7,9 @@ Standards-Version: 3.6.1
 
 Package: git-core
 Architecture: any
-Depends: ${misc:Depends}, shellutils, diff, rsync, rcs
+Depends: ${shlibs:Depends}, ${misc:Depends}, patch, diff, rcs
+Recommends: rsync, curl, ssh
+Conflicts: git
 Description: The git content addressable filesystem
  GIT comes in two layers. The bottom layer is merely an extremely fast
  and flexible filesystem-based database designed to store directory trees

debian/rules

@@ -12,6 +12,20 @@ else
 endif
 export CFLAGS
 
+#
+# On PowerPC we compile against the hand-crafted assembly, on all
+# other architectures we compile against GPL'ed sha1 code lifted
+# from Mozilla.  OpenSSL is strangely licensed and best avoided
+# in Debian.
+#
+HOST_ARCH=$(shell dpkg-architecture -qDEB_HOST_ARCH)
+ifeq (${HOST_ARCH},powerpc)
+	export PPC_SHA1=YesPlease
+else
+	export MOZILLA_SHA1=YesPlease
+endif
+
+
 PREFIX := /usr
 MANDIR := /usr/share/man/