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Swift: Ninja: Remove module dependency for executables

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We shouldn't include the swiftmodule in the ninja dependency graph
unless that target emits a swiftmodule.

Fixes: #25869
This commit is contained in:
Evan Wilde 2024-04-05 14:13:22 -07:00
parent 5fc6d6165c
commit 579472d877
No known key found for this signature in database
2 changed files with 30 additions and 14 deletions
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41
Source/cmNinjaTargetGenerator.cxx
View File

@ -2016,11 +2016,21 @@ void cmNinjaTargetGenerator::WriteSwiftObjectBuildStatement(
this->LocalGenerator->AppendFlags(vars["FLAGS"], "-static");
}
// Does this swift target emit a module file for importing into other
// targets?
auto isImportableTarget = [](cmGeneratorTarget const& tgt) -> bool {
// Everything except for executables that don't export anything should emit
// some way to import them.
if (tgt.GetType() == cmStateEnums::EXECUTABLE) {
return tgt.IsExecutableWithExports();
}
return true;
};
// Swift modules only make sense to emit from things that can be imported.
// Executables that don't export symbols can't be imported, so don't try to
// emit a swiftmodule for them. It will break.
if (target.GetType() != cmStateEnums::EXECUTABLE ||
target.IsExecutableWithExports()) {
if (isImportableTarget(target)) {
std::string const emitModuleFlag = "-emit-module";
std::string const modulePathFlag = "-emit-module-path";
this->LocalGenerator->AppendFlags(
@ -2089,18 +2099,21 @@ void cmNinjaTargetGenerator::WriteSwiftObjectBuildStatement(
if (!dep->IsLanguageUsed("Swift", config)) {
continue;
}
// Add dependencies on the emitted swiftmodule file from swift targets we
// depend on
std::string const depModuleName =
getTargetPropertyOrDefault(*dep, "Swift_MODULE_NAME", dep->GetName());
std::string const depModuleDir = getTargetPropertyOrDefault(
*dep, "Swift_MODULE_DIRECTORY",
dep->LocalGenerator->GetCurrentBinaryDirectory());
std::string const depModuleFilename = getTargetPropertyOrDefault(
*dep, "Swift_MODULE", cmStrCat(depModuleName, ".swiftmodule"));
std::string const depModuleFilepath =
this->ConvertToNinjaPath(cmStrCat(depModuleDir, '/', depModuleFilename));
objBuild.ImplicitDeps.push_back(depModuleFilepath);
// If the dependency emits a swiftmodule, add a dependency edge on that
// swiftmodule to the ninja build graph.
if (isImportableTarget(*dep)) {
std::string const depModuleName =
getTargetPropertyOrDefault(*dep, "Swift_MODULE_NAME", dep->GetName());
std::string const depModuleDir = getTargetPropertyOrDefault(
*dep, "Swift_MODULE_DIRECTORY",
dep->LocalGenerator->GetCurrentBinaryDirectory());
std::string const depModuleFilename = getTargetPropertyOrDefault(
*dep, "Swift_MODULE", cmStrCat(depModuleName, ".swiftmodule"));
std::string const depModuleFilepath = this->ConvertToNinjaPath(
cmStrCat(depModuleDir, '/', depModuleFilename));
objBuild.ImplicitDeps.push_back(depModuleFilepath);
}
}
objBuild.OrderOnlyDeps.push_back(this->OrderDependsTargetForTarget(config));

3
Tests/SwiftOnly/CMakeLists.txt
View File

@ -50,6 +50,9 @@ if(NOT XCODE_VERSION OR XCODE_VERSION VERSION_GREATER_EQUAL 9.0)
set_target_properties(O PROPERTIES Swift_COMPILATION_MODE "incremental")
endif()
add_library(P L.swift)
add_dependencies(P SwiftOnly)
# Dummy to make sure generation works with such targets.
add_library(SwiftIface INTERFACE)
target_link_libraries(SwiftOnly PRIVATE SwiftIface)