--puresize=VALUE Override default amount of space for pure Lisp code.
--rel-alloc Use the relocating allocator (default for this option
+--with-dlmalloc Control usage of Doug Lea malloc on systems that have
+ it in the standard C library (default is to use it if
--with-clash-detection Use lock files to detect multiple edits of the same file.
The default is to not do clash detection.
--lockdir=DIR The directory to put clash detection files in, such as