rebar.config cleanup, much smaller snappy.so object

Removed unnecessary linking with all the shared objects from google-snappy
(it even linked with the unit tests object). The final snappy.so NIF object is
now about 135Kb instead of 400Kb.

Makefile

@@ -1,6 +1,7 @@
 all: snappy eunit
 
 snappy:
+	./support/build-google-snappy.sh
 	./rebar compile
 
 eunit:
@@ -9,6 +10,7 @@ eunit:
 check: eunit
 
 clean:
+	./support/clean-google-snappy.sh
 	./rebar clean
 	rm -fr priv ebin
 

rebar.config

@@ -1,20 +1,9 @@
-{port_sources, ["c_src/*.cc", "c_src/google-snappy/*.cc"]}.
-{so_name, "snappy.so"}.
-
+{erl_opts, [debug_info, warn_unused_vars, nowarn_shadow_vars, warn_unused_import]}.
+{port_sources, ["c_src/*.cc"]}.
 {port_envs, [
-    %% Make sure to link -lstdc++ on linux or solaris
+    {"CXXFLAGS", "$CXXFLAGS -Ic_src"},
     {"(linux|solaris)", "LDFLAGS", "$LDFLAGS -lstdc++"},
-
-    %% OS X Leopard flags for 64-bit
-    {"darwin9.*-64$", "CXXFLAGS", "-m64"},
-    {"darwin9.*-64$", "LDFLAGS", "-arch x86_64"},
-
-    %% OS X Snow Leopard flags for 32-bit
-    {"darwin10.*-32$", "CXXFLAGS", "-m32"},
-    {"darwin10.*-32$", "LDFLAGS", "-arch i386"}
+    {"LDFLAGS", "$LDFLAGS c_src/google-snappy/snappy.o c_src/google-snappy/snappy-sinksource.o"}
 ]}.
-
-{port_pre_script, {"support/build-google-snappy.sh", ""}}.
-{port_cleanup_script, "support/clean-google-snappy.sh"}.
-
+{so_name, "snappy.so"}.
 {eunit_opts, [verbose]}.