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ModuleInterface/Serialization: allow library authors to define a custom module version number

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This allows library authors to pass down a project version number so that library users can conditionally
import that library based on the available version in the search paths.

Needed for rdar://73992299
This commit is contained in:
Xi Ge
2021-04-29 15:59:56 -07:00
parent dfec9e6434
commit fe5c7ef995
17 changed files with 79 additions and 6 deletions
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6
lib/Serialization/Serialization.cpp
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@@ -961,10 +961,16 @@ void Serializer::writeHeader(const SerializationOptions &options) {
size_t compatibilityVersionStringLength =
versionString.tell() - shortVersionStringLength - 1;
versionString << ")/" << version::getSwiftFullVersion();
auto userModuleMajor = options.UserModuleVersion.getMajor();
auto userModuleMinor = 0;
if (auto minor = options.UserModuleVersion.getMinor()) {
userModuleMinor = *minor;
}
Metadata.emit(ScratchRecord,
SWIFTMODULE_VERSION_MAJOR, SWIFTMODULE_VERSION_MINOR,
shortVersionStringLength,
compatibilityVersionStringLength,
userModuleMajor, userModuleMinor,
versionString.str());
Target.emit(ScratchRecord, M->getASTContext().LangOpts.Target.str());