ARM Compiler toolchain v4.1 for µVision Using the Compiler

Getting started with the Compiler
3.19 Minimizing compilation build time with a single armcc invocation
The following type of script incurs multiple loads and unloads of the compiler and multiple
license checkouts:
armcc file1.c ...
armcc file2.c ...
armcc file3.c ...
Instead, you can try modifying your script to compile multiple files within a single invocation
of armcc. For example, armcc file1.c file2.c file3.c ...
For convenience, you can also list all your .c files in a single via file invoked with armcc -via
sources.txt.
Although this mechanism can dramatically reduce license checkouts and loading and unloading
of the compiler to give significant improvements in build time, the following limitations apply:
• All files are compiled with the same options.
• Converting existing build systems could be difficult.
• Usability depends on source file structure and dependencies.
• An IDE might be unable to report which file had compilation errors.
• After detecting an error, the compiler does not compile subsequent files.
• Compiling these files at optimization level -O3 enables multifile compilation, which
might increase build times. Use --no_multifile to disable multifile compilation.
3.19.1 See also
Tasks
• How to minimize compilation build time on page 3-26.
Concepts
Introducing the ARM Compiler toolchain:
• Licensed features of the toolchain on page 2-8
Reference
Compiler Reference:
• --multifile, --no_multifile on page 3-67
• -Onum on page 3-71
• --via=filename on page 3-95.
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