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VS: Do not use native unity builds on VS 2017 versions less than 15.8

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VS 2017 version 15.8 introduced support for unity builds implemented
in part by the `$(VCTargetsPath)/Microsoft.Cpp.Unity.targets` file.
Do not enable unity builds on VS 15 versions that do not have that file.

Fixes: #20284
This commit is contained in:
Brad King 2020-02-04 11:37:22 -05:00
parent 21e60da5bb
commit 9135954e2f
3 changed files with 12 additions and 7 deletions
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6
Source/cmGlobalVisualStudio10Generator.cxx
View File

@ -230,6 +230,12 @@ bool cmGlobalVisualStudio10Generator::SetGeneratorToolset(
}
}
this->SupportsUnityBuilds =
this->Version >= cmGlobalVisualStudioGenerator::VS16 ||
(this->Version == cmGlobalVisualStudioGenerator::VS15 &&
cmSystemTools::PathExists(this->VCTargetsPath +
"/Microsoft.Cpp.Unity.targets"));
if (this->GeneratorToolsetCuda.empty()) {
// Find the highest available version of the CUDA tools.
std::vector<std::string> cudaTools;

3
Source/cmGlobalVisualStudio10Generator.h
View File

@ -108,6 +108,8 @@ public:
virtual bool IsDefaultToolset(const std::string& version) const;
virtual std::string GetAuxiliaryToolset() const;
bool GetSupportsUnityBuilds() const { return this->SupportsUnityBuilds; }
bool FindMakeProgram(cmMakefile* mf) override;
bool IsIPOSupported() const override { return true; }
@ -172,6 +174,7 @@ protected:
std::string DefaultMasmFlagTableName;
std::string DefaultNasmFlagTableName;
std::string DefaultRCFlagTableName;
bool SupportsUnityBuilds = false;
bool SystemIsWindowsCE;
bool SystemIsWindowsPhone;
bool SystemIsWindowsStore;

10
Source/cmVisualStudio10TargetGenerator.cxx
View File

@ -2085,9 +2085,7 @@ void cmVisualStudio10TargetGenerator::WriteAllSources(Elem& e0)
const bool haveUnityBuild =
this->GeneratorTarget->GetPropertyAsBool("UNITY_BUILD");
if (haveUnityBuild &&
this->GlobalGenerator->GetVersion() >=
cmGlobalVisualStudioGenerator::VS15) {
if (haveUnityBuild && this->GlobalGenerator->GetSupportsUnityBuilds()) {
Elem e1(e0, "PropertyGroup");
e1.Element("EnableUnitySupport", "true");
}
@ -2193,9 +2191,7 @@ void cmVisualStudio10TargetGenerator::WriteAllSources(Elem& e0)
this->WriteSource(e2, si.Source);
bool useNativeUnityBuild = false;
if (haveUnityBuild &&
this->GlobalGenerator->GetVersion() >=
cmGlobalVisualStudioGenerator::VS15) {
if (haveUnityBuild && this->GlobalGenerator->GetSupportsUnityBuilds()) {
// Magic value taken from cmGlobalVisualStudioVersionedGenerator.cxx
static const std::string vs15 = "141";
std::string toolset =
@ -2222,7 +2218,7 @@ void cmVisualStudio10TargetGenerator::WriteAllSources(Elem& e0)
si.Source->GetProperty("UNITY_SOURCE_FILE"));
e2.Attribute("UnityFilesDirectory", unityDir);
} else {
// Visual Studio versions prior to 2017 do not know about unity
// Visual Studio versions prior to 2017 15.8 do not know about unity
// builds, thus we exclude the files alredy part of unity sources.
if (!si.Source->GetPropertyAsBool("SKIP_UNITY_BUILD_INCLUSION")) {
exclude_configs = si.Configs;