Reduce cflag pollution from curl

SConstruct

@@ -79,9 +79,12 @@ if conf.env.WhereIs('dpkg'):
 conf.env.AppendUnique(CPPPATH = [pjoin(cprefix[1], "include")])
 
 # TOOD: this is less than optimal, since curl-config polutes this quite badly :(
-d = conf.env.ParseFlags(clibs[1])
+t = clibs[1].replace('-g0 ', '')
+t = t.replace('-Wno-system-headers ', '')
+t = t.replace('-Os ', '')
+d = conf.env.ParseFlags(t)
 conf.env.MergeFlags(d)
-conf.env.AppendUnique(CPPFLAGS = ["-Wall"])
+conf.env.AppendUnique(CPPFLAGS = ["-Wall", '-O0', '-ggdb'])
 # this is needed on solaris because of its dumb library path issues
 conf.env.AppendUnique(RPATH = conf.env.get('LIBPATH'))
 env = conf.Finish()