/^CFLAGS *=/s!=.*$!=-O2 -g!
/^C_SWITCH_SYSTEM *=/s!=.*$!=-DMSDOS!
/^C_SWITCH_MACHINE *=/s/@C_SWITCH_MACHINE@//
+/^C_WARNINGS_SWITCH *=/s/@C_WARNINGS_SWITCH@//
+/^PROFILING_CFLAGS *=/s/@PROFILING_CFLAGS@//
+/^PROFILING_LDFLAGS *=/s/@PROFILING_LDFLAGS@//
/^LOADLIBES *=/s!=.*$!=!
/^ALLOCA *=/s!@ALLOCA@!!
/^EXEEXT *=/s!@EXEEXT@!!