feat: Add support for -fprofile-prefix-path gcc option (#1507) #1515
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jrosdahl
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Sep 21, 2024
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Current CCache (4.10.2) doesn't support shared caching for coverage builds in different build workspaces using gcc as the "apparent real path" of the object file is always part of the cache key.
This is needed as gcc by default uses the "apparent real path" of the object file to create gcda files and therefore these paths will be embedded in the object file.
gcc 10+ added the -fprofile-prefix-path=path option that can be used to lstrip the gcda filenames and enable the same object files to be created in different build workspaces when using --coverage.
This change adds support for -fprofile-prefix-path=path thus enables ccache to reuse object files across build workspaces with the correct settings.
See #1507 for more details.