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9d178c92 |
| 10-Apr-2021 |
Ed Maste <emaste@FreeBSD.org> |
Drop 'Set to' from most src.conf(5) knobs
The description is clearly what effect the knob has when set, so the additional text was unnecessary.
Reviewed by: jhb, se Sponsored by: The FreeBSD Founda
Drop 'Set to' from most src.conf(5) knobs
The description is clearly what effect the knob has when set, so the additional text was unnecessary.
Reviewed by: jhb, se Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D29583
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cbafd263 |
| 22-Jun-2018 |
Dimitry Andric <dim@FreeBSD.org> |
Add support for selectively enabling LLVM targets
This makes it possible, through src.conf(5) settings, to select which LLVM targets you want to build during buildworld. The current list is:
* (WI
Add support for selectively enabling LLVM targets
This makes it possible, through src.conf(5) settings, to select which LLVM targets you want to build during buildworld. The current list is:
* (WITH|WITHOUT)_LLVM_TARGET_AARCH64 * (WITH|WITHOUT)_LLVM_TARGET_ARM * (WITH|WITHOUT)_LLVM_TARGET_MIPS * (WITH|WITHOUT)_LLVM_TARGET_POWERPC * (WITH|WITHOUT)_LLVM_TARGET_SPARC * (WITH|WITHOUT)_LLVM_TARGET_X86
To not influence anything right now, all of these are on by default, in situations where clang is enabled.
Selectively turning a few targets off manually should work. Turning on only one target should work too, even if that target does not correspond to the build architecture. (In that case, LLVM_NATIVE_ARCH will not be defined, and you can only use the resulting clang executable for cross-compiling.)
I performed a few measurements on one of the FreeBSD.org reference machines, building clang from scratch, with all targets enabled, and with only the x86 target enabled. The latter was ~12% faster in real time (on a 32-core box), and ~14% faster in user time. For a full buildworld the difference will probably be less pronounced, though.
Reviewed by: bdrewery MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D11077
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