Using `$libdir` doesn't work and produces an error when configuring with ` ./configure --with-unixodbc=$(brew --prefix)`
> configure:21209: gcc -o conftest -g -O2 -Wall -Werror -L/opt/homebrew/${exec_prefix}/lib conftest.c -lodbcinst >&5
> ld: warning: directory not found for option '-L/opt/homebrew/${exec_prefix}/lib'
> ld: library not found for -lodbcinst
> clang: error: linker command failed with exit code 1 (use -v to see invocation)
Note that `warning: directory not found for option '-L/.../${exec_prefix}/lib'` is always emitted but if unixodbc is installed in `/usr/local/lib` linking would still work.
Cédric Luthi