Insert a placeholder that MacPorts will replace with its CFLAGS since this configure script overwrites the CFLAGS environment variable. https://github.com/nh13/BFAST/issues/5 --- configure.orig 2011-10-29 14:32:59.000000000 -0500 +++ configure 2022-01-29 02:24:29.000000000 -0600 @@ -3581,7 +3581,7 @@ # set CFLAGS and CXXFLAGS -default_CFLAGS="-Wall -g -O2 -pthread"; +default_CFLAGS="-Wall -g @CFLAGS@ -pthread"; extended_CFLAGS="";# "-m64 -D_FILE_OFFSET_BITS=64"; # Define some variables