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ZBasic Language Reference
118
ZX Microcontroller Family
string-pooling
Code size is reduced by detecting identical strings. Each string
appears just once in Program Memory but may be referred to in
multiple places.
unreachable-code
Code that cannot possibly be executed may be eliminated.
unreferenced-code
Routines that are not used are not included in the generated code.
unreferenced-vars
Variables that are not referenced or are eliminated by optimization
may not be allocated space.
use-identities
Expression complexity may be reduced by applying algebraic or
logical identities. For example, i * j can be replaced by i if j is
known to have the value 1.
useless-code
Code that is known to have no useful effect may be eliminated. For
example, assigning a value to a local variable that is never used is
considered useless.
The invocation option –-help-optimize displays similar information and also indicates which
optimizations are on by default.
--out=<file>
This option explicitly specifies the name for the file for the generated code. In the absence of this option,
the output file name is derived from either the project file, if specified, or the first file compiled. If an
earlier or later option specifies that no code should be generated this option is ignored.
--project=<file>
This option specifies the name of a project file. A project file is similar to an arguments file in that it may
contain additional compiler options and filenames that are processed before processing subsequent
command line options. Additionally, however, several other file names (e.g. map file, output file) are
derived from the first-specified project’s filename in the absence of other overriding options. Project files
may contain blank lines and comment lines (beginning with a pound sign or an apostrophe). Project files
may not be nested but an arguments file may be specified within a project file and vice versa.
--strict={On|Off|Default}
This option specifies whether strict syntax mode should be on, off or the default state for the selected
language. See Section 2.3.1 for more information on the default state of this option for the supported
language variants and the effects of strict mode.
--string-size=<value>
This option specifies the default string length, in decimal, for statically allocated strings in modules
subsequently processed. It may be overridden in any module by the Option StringSize directive.
See Section 2.3.1 for more information on how this value is used.
--target-CPU=<target>
This option is deprecated, use –-target-device instead.
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