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Compiler User Guide
Minimizing compilation build time with a single armcc invocation
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| Home > Getting Started with the Compiler > 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:
armccfile1.c ...armccfile2.c ...armccfile3.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
-O3enables multifile compilation, which might increase build times. Use--no_multifileto disable multifile compilation.
See also- Tasks
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Compiler Reference:
| Copyright © 2007-2008, 2011-2012 ARM. All rights reserved. | ARM DUI 0375D |
| Non-Confidential | ID062912 |
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