Add a script which generates patchelf command for binary distribution.

This script use your local Nix store to find occurences of similar libraries
name and generate a patchelf command based on the package name found inside
your Nix store.

svn path=/nixpkgs/trunk/; revision=17089

maintainers/scripts/patchelf-hints.sh

@@ -0,0 +1,84 @@
+
+usage() {
+    echo "
+$0 <path to unpacked binary distribution directory>
+
+This program return the list of libraries and where to find them based on
+your currently installed programs.
+";
+    exit 1
+}
+
+if test $# -ne 1; then
+  usage
+fi
+
+binaryDist=$1
+
+hasBinaries=false
+for bin in $(find $binaryDist -executable -type f) :; do
+    if test $bin = ":"; then
+        $hasBinaries || \
+            echo "No patchable found in this directory."
+        break
+    fi
+    hasBinaries=true
+
+    echo ""
+    echo "$bin:"
+    hasLibraries=false
+    unset interpreter
+    unset addRPath
+    for lib in $(strings $bin | grep '^\(/\|\)lib.*\.so' | sort | uniq) :; do
+        if test $lib = ":"; then
+            $hasLibraries || \
+                echo "  This program is a script or it is statically linked."
+            break
+        fi
+        hasLibraries=true
+
+        echo "  $lib:";
+
+        libPath=$lib
+        lib=$(basename $lib)
+
+        #versionLessLib=$(echo $lib | sed 's,[.][.0-9]*$,,')
+
+        libs="$(
+            find /nix/store/*/lib* \( -type f -or -type l \) -name $lib |
+            grep -v '\(bootstrap-tools\|system-path\|user-environment\|extra-utils\)'
+        )"
+
+        echo "$libs" |
+        sed 's,^/nix/store/[a-z0-9]*-\([^/]*\)/.*/\([^/]*\)$,    \1 -> \2,' |
+        sort |
+        uniq;
+
+        names=$(
+            echo "$libs" |
+            sed 's,^/nix/store/[a-z0-9]*-\([^/]*\)-[.0-9]*/.*$,\1,' |
+            sort |
+            uniq;
+        )
+
+        if test "$names" = "glibc"; then names="stdenv.glibc"; fi
+        if echo $names | grep -c "gcc" &> /dev/null; then names="stdenv.gcc"; fi
+
+        if test $lib != $libPath; then
+            interpreter="--interpreter \${$names}/lib/$lib"
+        elif echo $addRPath | grep -c "$names" &> /dev/null; then
+            :
+        else
+            addRPath=${addRPath+$addRPath:}"\${$names}/lib"
+        fi
+    done;
+    $hasLibraries && \
+        echo "
+  Patchelf command:
+
+    patchelf $interpreter \\
+      ${addRPath+--set-rpath $addRPath \\
+}      \$out/$bin
+
+"
+done;