fix some stupid issue with weak symbols (#56), also minor makefile fixes

flips.cpp

@@ -11,7 +11,6 @@
 void* operator new(size_t n) { return malloc(n); } // forget allocation failures, let them segfault.
 void operator delete(void * p) { free(p); }
 void operator delete(void * p, size_t n) { free(p); }
-extern "C" void __cxa_pure_virtual() { abort(); }
 
 #if __GNUC__ && (__cpp_rtti || __cpp_exceptions)
 #warning "Consider building with -fno-exceptions -fno-rtti, to avoid dependencies on libgcc_s_sjlj-1.dll and libstdc++-6.dll."

make-maintainer.sh

@@ -6,6 +6,7 @@ echo "  edit this script to satisfy its dependencies);"
 echo "if you just want a Linux binary, use make.sh instead."
 
 rm floating.zip
+rm -r obj/* || true
 
 # . rather than ./make.sh, so $FLAGS remains set
 . ./make.sh

make.sh

@@ -10,7 +10,7 @@ FLAGS=$FLAGS' -ffunction-sections -fdata-sections -Wl,--gc-sections -fprofile-di
 LINFLAGS=' -Wl,-z,relro,-z,now,--as-needed,--hash-style=gnu,--relax'
 
 # not a good solution, but imposing Werror on others is rude, and I'm not aware of a better way to detect if it's me
-if [ "$HOME" = "/home/alcaro" ]; then
+if [ "$HOME" = "/home/walrus" ]; then
   FLAGS=$FLAGS" -Werror"
 fi