The configure script does not look for SDL2 framework, it uses pkg-config to find the includes and library flags.
You may be able to get to work by setting the following environment variables before running configure:
Code:
export SDL2_CFLAGS="-I/path/to/dir/containgin/SDL/header/files"
export SDL2_LIBS="-F/path/to/dir/containing/framework -framework SDL2"
(Alternatively, SDL 2.0.1 source tarball here:
https://www.libsdl.org/release/SDL2-2.0.1.tar.gz)