updates

build/make.linux64.so.py

@@ -16,6 +16,7 @@ builddir = "./build_linux64"
 
 doinstall = True   #copies the build_output to the install dir when finished
 cc = "gcc" #compiler
+# -fvisibility=hidden -- stripping symbols to avoid namespace pollution doesn't seem to work on Linux
 cflags = "-fPIC -O3 -DEXPORT_AMSCIMGLIB4"
 libraries = "-l{} -ljpeg -lpng -lz -lm".format(libname)
 libdirs = "-L{} -L{}/lib -L{}/lib".format(builddir,commondir,depdir)