projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| f67539c2 TL |
1 | # Copyright 2019 Dmitry Arkhipov |
| 2 | # Distributed under the Boost Software License, Version 1.0. | |
| 3 | # (See accompanying file LICENSE_1_0.txt or copy at | |
| 4 | # http://www.boost.org/LICENSE_1_0.txt) | |
| 5 | ||
| 6 | import feature ; | |
| 7 | ||
| 8 | #| tag::doc[] | |
| 9 | ||
| 10 | [[bbv2.builtin.features.lto]]`lto`:: | |
| 11 | *Allowed values:* `on`. | |
| 12 | + | |
| 13 | Enables link time optimizations (also known as interprocedural optimizations or | |
| 14 | whole-program optimizations). Currently supported toolsets are <<GNU {CPP}>>, | |
| 15 | clang and <<Microsoft Visual {CPP}>>. The feature is optional. | |
| 16 | ||
| 17 | |# # end::doc[] | |
| 18 | ||
| 19 | feature.feature lto | |
| 20 | : on | |
| 21 | : optional propagated ; | |
| 22 | ||
| 23 | #| tag::doc[] | |
| 24 | ||
| 25 | [[bbv2.builtin.features.lto-mode]]`lto-mode`:: | |
| 26 | *Subfeature of* `lto` | |
| 27 | + | |
| 28 | *Allowed values:* `full`, `thin`, `fat`. | |
| 29 | + | |
| 30 | Specifies the type of LTO to use. | |
| 31 | + | |
| 32 | `full`::: Use the monolithic LTO: on linking all input is merged into a single | |
| 33 | module. | |
| 34 | `thin`::: Use clang's ThinLTO: each compiled file contains a summary of the | |
| 35 | module, these summaries are merged into a single index. This allows to avoid | |
| 36 | merging all modules together, which greatly reduces linking time. | |
| 37 | `fat`::: Produce gcc's fat LTO objects: compiled files contain both the | |
| 38 | intermidiate language suitable for LTO and object code suitable for regular | |
| 39 | linking. | |
| 40 | ||
| 41 | |# # end::doc[] | |
| 42 | ||
| 43 | feature.subfeature lto | |
| 44 | : mode | |
| 45 | : full thin fat | |
| 46 | : propagated ; |