Workaround part interconnection problem.

component/gcc/buildout.cfg

@@ -63,6 +63,7 @@ md5sum = d7cd6a27c8801e66cbaa964a039ecfdb
 filename = ecj.jar
 
 [gcc-download]
+hack-revision = ${gcc-interconnection-workaround:hack-revision}
 recipe = hexagonit.recipe.download
 url = http://www.mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-4.5.3/gcc-4.5.3.tar.bz2
 md5sum = 8e0b5c12212e185f3e4383106bfa9cc6
@@ -70,6 +71,7 @@ strip-top-level-dir = True
 destination = ${gcc-source:location}
 
 [gcc-java-download]
+hack-revision = ${gcc-interconnection-workaround:hack-revision}
 recipe = hexagonit.recipe.download
 url = http://www.mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-4.5.3/gcc-java-4.5.3.tar.bz2
 md5sum = 08e045fdbdc22ac9af3aec3b8d16dbab
@@ -78,6 +80,7 @@ destination = ${gcc-source:location}
 ignore-existing = true
 
 [gcc-source]
+hack-revision = ${gcc-interconnection-workaround:hack-revision}
 location = ${buildout:parts-directory}/${:_buildout_section_name_}
 
 [gcc-multiarch.patch]
@@ -95,6 +98,7 @@ filename = ${:_buildout_section_name_}
 download-only = true
 
 [gcc-java-minimal]
+hack-revision = ${gcc-interconnection-workaround:hack-revision}
 depends =
   ${gcc-download:location}
   ${gcc-java-download:location}
@@ -129,6 +133,7 @@ environment =
 make-targets = install -j1
 
 [gcc]
+hack-revision = ${gcc-interconnection-workaround:hack-revision}
 depends =
   ${gcc-download:location}
   ${gcc-java-download:location}
@@ -159,3 +164,10 @@ environment =
   PATH=${zip:location}/bin:%(PATH)s
 # make install does not work when several core are used
 make-targets = install -j1
+
+[gcc-interconnection-workaround]
+# gcc parts are interconnected, so buildout is not capable to clean them up
+# until gcc will be simplified by using more robust build recipe (like
+# slapos.recipe.build) each time any of parts which reuses this one gets updated
+# the hack-revision have to be increased
+hack-revision = 1