When a directive such as (A), below, is encountered by qpc
, it notes
that the QOF file being produced has a dependency on basics.qof
in the
library. The dependency is not stored as an absolute filename, so that
when (B) is called (recall that the -d
option
causes qld
to pull in all the dependencies of the specified
QOF files), basics.qof
will be sought wherever the current libraries
are located. These need not be in the same place as at compilation
time; in particular the QOF file may have been moved to a different
machine.
:- ensure_loaded(library(basics)). (A) % qld -d ... (B)
The -L
option of qpc
and qld
allow
prepending library directory definitions to the already existing ones.
The -f
and -F
options perform similar functions but are more
flexible than -L
: -f
appends a file search path definition
to the already existing set, while -F
prepends a file search path. A
-f
option, as exemplified in (C), corresponds to a
file_search_path/2
call, (D). In such calls, path
can itself
be a file search path, as in (E).
-f pathname:path (C) file_search_path(pathname, path) (D) -f "mypath:library(mypackage)" (E)
For more detail on these options, see too-too.