Sapporo will now use an environment variable to find kernels, also removed unused files.

sapporo2/get_sapporo.sh

@@ -3,7 +3,29 @@ commit=7c3f80acf1df5a8907118706a2260184cfccc6a1
 archive_md5sum=b7b17eeded2cb5dfb9e174424b3f7ecb
 url=https://github.com/treecode/sapporo2/archive/$commit.tar.gz
 wget -O sapporo2.tar.gz $url
+
+# Verify source.
 md5sum --check <<<"$archive_md5sum sapporo2.tar.gz"
+
+# Protect .gitignore.
+cp -rp .gitignore .gitignore~
+
+# Untar original source.
 tar --strip-components=1 -xvf sapporo2.tar.gz
-rm -f sapporo2.tar.gz
+
+# Restore .gitignore
+mv .gitignore~ .gitignore
+
+# Cleanup unused bits
+rm -rf sapporo2.tar.gz                  \
+       lib/include/vec.h                \
+       lib/include/ocldev.h*            \
+       lib/include/SSE_AVX              \
+       lib/interfaces/sapporo6thlib.cpp \
+       lib/interfaces/sapporoG5lib.cpp  \
+       lib/interfaces/sapporoYeblib.cpp \
+       lib/Makefile_ocl                 \
+       lib/OpenCLKernels
+
+# Patch source.
 patch -p0 < patch.diff