The default behavior of amake can be overridden by
assigning values to makefile variables. Of course, they can
be target-specific assignments.
   
A variable is considered to be “set” if and only if it has
a value and that value is not of length zero. In other
words, this does not “set” variable FOO:
FOO:=
but this does:
FOO:=1
These are the variables:
ACCESS_ANYCMD: If set, .cmd file content is
    ignored. 
ACCESS_DIR: This specifies a directory for dependency
    files. 
ACCESS_CEXT: This overrides the extension for
    .cmd files. 
ACCESS_DEXT: This overrides the extension for
    .dep files. 
ACCESS_SEXT: This overrides the extension for
    .sib files. 
ACCESS_FAIL: This is a pattern for filtering-out
    files-accessed dependencies. 
ACCESS_PASS: This is a pattern for filtering
    files-accessed dependencies. 
ACCESS_ARCH: This overrides the computed host
    architecture. 
ACCESS_CACHE: This enables the target cache.  If set,
    targets are checksummed regardless of the value of
    ACCESS_CHKSUM. 
ACCESS_CHKSUM: This enables checksum comparison of
    dependencies, regardless of the value of
    ACCESS_CACHE.  For a cache-get operation,
    checksum comparison of dependencies is used to analyze
    a candidate. 
ACCESS_LMTIME: This enables last-modification-time
    comparison of dependencies, regardless of the value of
    ACCESS_CACHE.  For a cache-get operation,
    last-modification-time comparison of dependencies is
    used to analyze a candidate. Time comparison is for
    exact equality, not the usual older/newer than. 
ACCESS_ENVVARS: This is a space-separated list of
    environment variables to put in .cmd files. 
ACCESS_PROGRAM: This overrides the name of the
collect script. 
ACCESS_LIBRARY: This overrides the name of wrapper
    library. 
ACCESS_SHLIBS: This enables shared-libraries-opened
    dependency analysis. 
ACCESS_LDD: This overrides the name of the program to
    print shared-library dependencies. 
ACCESS_DEBUG: This enables verbose debugging messages
    from the libaccess wrappers.