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Compiler Command-line Options
Default
The default is --no_multifile, unless the option -O3 is specified.
If the option -O3 is specified, then the default is --multifile.
Usage
When --multifile is selected, the compiler might be able to perform additional
optimizations by compiling across several source files.
There is no limit to the number of source files that can be specified on the command
line, but ten files is a practical limit, because --multifile requires large amounts of
memory while compiling. For the best optimization results, choose small groups of
functionally related source files.
Example
armcc -c --multifile test1.c ... testn.c -o test.o
The resulting object file is named test.o, instead of test1.c, and empty object files
test2.o to testn.o are created for each source file test1.c ... testn.c specified on the
command line.
See also
• -c on page 2-21
• --default_extension=ext on page 2-38
• --ltcg on page 2-88
• -o filename on page 2-95
• -Onum on page 2-96
• --whole_program on page 2-136.
2.1.116 --multiply_latency=cycles
This option tells the compiler the number of cycles used by the hardware multiplier.
Syntax
--multiply_latency=cycles
Where cycles is the number of cycles used.
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