shithub: libvpx

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Make sure diff is present at configure time.

This avoids an endless build loop at vpx_version.h
creation time when diff is not present.

Change-Id: I16ae386dbdaf14f9a2b85e4c5d1aaa6c08f52a45

--- a/configure

+++ b/configure

@@ -170,10 +170,13 @@

     [ -f "${source_path}/${t}.mk" ] && enable_feature ${t}

 done

+if ! diff --version >/dev/null; then

+  die "diff missing: Try installing diffutils via your package manager."

+fi

+

 if ! perl --version >/dev/null; then

     die "Perl is required to build"

 fi

-

 if [ "`cd \"${source_path}\" && pwd`" != "`pwd`" ]; then

   # test to see if source_path already configured