diff options
| author | Kyle Edwards <kyle.edwards@kitware.com> | 2020-07-29 14:19:56 -0400 |
|---|---|---|
| committer | Brad King <brad.king@kitware.com> | 2020-08-12 11:31:07 -0400 |
| commit | 2e42651dff43c4e962f03fc24281cbf446880ded (patch) | |
| tree | 5a1fa6f2098d9cb5bdc04c7f9285dc454c3a5ebf /Source/cmGeneratorTarget.cxx | |
| parent | 0cd3b5d0ca8d541fc3769f467db71a07a95be7f6 (diff) | |
| download | cmake-2e42651dff43c4e962f03fc24281cbf446880ded.tar.gz | |
Add option to optimize link dependencies for static libraries
Add an `OPTIMIZE_DEPENDENCIES` target property and supporting
`CMAKE_OPTIMIZE_DEPENDENCIES` variable to optionally enable pruning and
flattening of outgoing dependencies from static libraries. Since they
do not actually link, they only depend on side effects of their
dependencies. Therefore we can drop dependencies that contribute no
side effects.
Diffstat (limited to 'Source/cmGeneratorTarget.cxx')
| -rw-r--r-- | Source/cmGeneratorTarget.cxx | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Source/cmGeneratorTarget.cxx b/Source/cmGeneratorTarget.cxx index 889ad7c17b..9611e142e7 100644 --- a/Source/cmGeneratorTarget.cxx +++ b/Source/cmGeneratorTarget.cxx @@ -1084,6 +1084,37 @@ std::vector<cmCustomCommand> const& cmGeneratorTarget::GetPostBuildCommands() return this->Target->GetPostBuildCommands(); } +void cmGeneratorTarget::AppendCustomCommandSideEffects( + std::set<cmGeneratorTarget const*>& sideEffects) const +{ + if (!this->GetPreBuildCommands().empty() || + !this->GetPreLinkCommands().empty() || + !this->GetPostBuildCommands().empty()) { + sideEffects.insert(this); + } else { + for (auto const& source : this->GetAllConfigSources()) { + if (source.Source->GetCustomCommand() != nullptr) { + sideEffects.insert(this); + break; + } + } + } +} + +void cmGeneratorTarget::AppendLanguageSideEffects( + std::map<std::string, std::set<cmGeneratorTarget const*>>& sideEffects) const +{ + static const std::set<cm::string_view> LANGS_WITH_NO_SIDE_EFFECTS = { + "C"_s, "CXX"_s, "OBJC"_s, "OBJCXX"_s, "ASM"_s, "CUDA"_s, + }; + + for (auto const& lang : this->GetAllConfigCompileLanguages()) { + if (!LANGS_WITH_NO_SIDE_EFFECTS.count(lang)) { + sideEffects[lang].insert(this); + } + } +} + bool cmGeneratorTarget::IsInBuildSystem() const { if (this->IsImported()) { |