On 14 Apr 2017, at 22:40, Mark Millard <mar...@dsl-only.net> wrote: > > man src.conf (from -r315914 ) reports: > > WITH_LLD_IS_LD > Set to use LLVM's LLD as the system linker, instead of GNU > binutils ld. > > This is a default setting on arm64/aarch64. When set, these > options are also in effect: > > WITHOUT_SYSTEM_COMPILER (unless WITH_SYSTEM_COMPILER is set > explicitly) > > I'm curious about: > > A) Why there is a bias to avoid the system compiler?
These are just the defaults, detected by the script that generates src.conf.5. The setting of MK_SYSTEM_COMPILER is actually dependent on the host, so it's technically incorrect to have src.conf.5 mention that it is off by default. > and by contrast: > > B) What sort of context justifies explicitly setting > WITH_SYSTEM_COMPILER when WITH_LLD_IS_LD is in use? The settings are mostly orthogonal. MK_SYSTEM_COMPILER was created to avoid building a bootstrap compiler, if the system (host) compiler is new enough. At some point you could also image a MK_SYSTEM_LINKER setting, which would avoid building the bootstrap linker, if the system linker is new enough. -Dimitry
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