On Wed, 2 Nov 2016, Ximin Luo wrote:

> This patch series adds a new environment variable SOURCE_PREFIX_MAP. When this
> is set, GCC will treat this as an implicit "-fdebug-prefix-map=$value"
> command-line argument. This makes the final binary output reproducible, and

Only one argument?  Sometimes you may want multiple -fdebug-prefix-map 
options (for both source and build directories, for example).  Perhaps the 
value should be split on spaces to provide multiple such mappings?

-- 
Joseph S. Myers
jos...@codesourcery.com

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