I made an error running configure. I was following the instructions at
https://github.com/tesseract-ocr/tesseract/wiki/Compiling#macos under macOS with Homebrew and Compile.
I typed "./configure CC=gcc-6 CXX=g++-6 CPPFLAGS=-I/usr/local/opt/icu4c/include LDFLAGS=-L/usr/local/opt/icu4c/lib". I got a message saying that the c++ compiler couldn't make executables.
Then I typed "./configure CC=" and Enter, and it worked, but I didn't assign the other environment variables.
I also typed "make" after that and that worked.
How do I start over with configure? Can I just type the command again, or do I have to erase or undo other things first?