STL_MSFT created this revision.
This is a minimally intrusive change, which I've verified works for both x86
and x64.
The idea is to add another bool data member, `IsDevDivInternal`. (This could be
unified with `IsVS2017OrNewer`, since it's a 3-way setting. Either a build is
DevDiv-internal, released VS 2017 or newer, or released VS 2015 or older. I can
easily make such a change if desired.) When looking at the directory structure,
if instead of `"VC"` we see `"x86ret"`, `"x86chk"`, `"amd64ret"`, or
`"amd64chk"`, we recognize this as a DevDiv-internal build.
After we get past the directory structure validation, we use this knowledge to
regenerate paths appropriately. `llvmArchToDevDivInternalArch()` knows how we
use `"i386"` subdirectories, and `MSVCToolChain::getSubDirectoryPath()` uses
that. It also knows that DevDiv-internal builds have an `"inc"` subdirectory
instead of `"include"`.
This may still not be the "right" fix in any sense, but I believe that it's
non-intrusive in the sense that if the special directory names aren't found,
`IsDevDivInternal` remains `false` and no codepaths are affected. I searched
for all references to `IsVS2017OrNewer`, which are places where Clang cares
about VS's directory structure, and the only one that isn't being patched is
some logic to deal with cross-compilation. I'm fine with that not working for
DevDiv-internal builds for the moment (we typically test the native compilers).
Is there still time to get a patch like this into 5.0.0, or is it too late?
https://reviews.llvm.org/D36860
Files:
lib/Driver/ToolChains/MSVC.cpp
lib/Driver/ToolChains/MSVC.h
Index: lib/Driver/ToolChains/MSVC.h
===================================================================
--- lib/Driver/ToolChains/MSVC.h
+++ lib/Driver/ToolChains/MSVC.h
@@ -131,6 +131,7 @@
private:
std::string VCToolChainPath;
bool IsVS2017OrNewer = false;
+ bool IsDevDivInternal = false;
CudaInstallationDetector CudaInstallation;
};
Index: lib/Driver/ToolChains/MSVC.cpp
===================================================================
--- lib/Driver/ToolChains/MSVC.cpp
+++ lib/Driver/ToolChains/MSVC.cpp
@@ -76,7 +76,8 @@
// Check various environment variables to try and find a toolchain.
static bool findVCToolChainViaEnvironment(std::string &Path,
- bool &IsVS2017OrNewer) {
+ bool &IsVS2017OrNewer,
+ bool &IsDevDivInternal) {
// These variables are typically set by vcvarsall.bat
// when launching a developer command prompt.
if (llvm::Optional<std::string> VCToolsInstallDir =
@@ -138,6 +139,13 @@
Path = ParentPath;
IsVS2017OrNewer = false;
return true;
+ } else if (llvm::sys::path::filename(ParentPath) == "x86ret"
+ || llvm::sys::path::filename(ParentPath) == "x86chk"
+ || llvm::sys::path::filename(ParentPath) == "amd64ret"
+ || llvm::sys::path::filename(ParentPath) == "amd64chk") {
+ Path = ParentPath;
+ IsDevDivInternal = true;
+ return true;
}
} else {
@@ -677,7 +685,7 @@
// what they want to use.
// Failing that, just try to find the newest Visual Studio version we can
// and use its default VC toolchain.
- findVCToolChainViaEnvironment(VCToolChainPath, IsVS2017OrNewer) ||
+ findVCToolChainViaEnvironment(VCToolChainPath, IsVS2017OrNewer, IsDevDivInternal) ||
findVCToolChainViaSetupConfig(VCToolChainPath, IsVS2017OrNewer) ||
findVCToolChainViaRegistry(VCToolChainPath, IsVS2017OrNewer);
}
@@ -766,6 +774,21 @@
}
}
+// Similar to the above function, but for DevDiv internal builds.
+static const char *llvmArchToDevDivInternalArch(llvm::Triple::ArchType Arch) {
+ using ArchType = llvm::Triple::ArchType;
+ switch (Arch) {
+ case ArchType::x86:
+ return "i386";
+ case ArchType::x86_64:
+ return "amd64";
+ case ArchType::arm:
+ return "arm";
+ default:
+ return "";
+ }
+}
+
// Get the path to a specific subdirectory in the current toolchain for
// a given target architecture.
// VS2017 changed the VC toolchain layout, so this should be used instead
@@ -776,7 +799,9 @@
llvm::SmallString<256> Path(VCToolChainPath);
switch (Type) {
case SubDirectoryType::Bin:
- if (IsVS2017OrNewer) {
+ if (IsDevDivInternal) {
+ llvm::sys::path::append(Path, "bin", llvmArchToDevDivInternalArch(TargetArch));
+ } else if (IsVS2017OrNewer) {
bool HostIsX64 =
llvm::Triple(llvm::sys::getProcessTriple()).isArch64Bit();
llvm::sys::path::append(Path, "bin", (HostIsX64 ? "HostX64" : "HostX86"),
@@ -787,12 +812,20 @@
}
break;
case SubDirectoryType::Include:
- llvm::sys::path::append(Path, "include");
+ if (IsDevDivInternal) {
+ llvm::sys::path::append(Path, "inc");
+ } else {
+ llvm::sys::path::append(Path, "include");
+ }
break;
case SubDirectoryType::Lib:
- llvm::sys::path::append(
- Path, "lib", IsVS2017OrNewer ? llvmArchToWindowsSDKArch(TargetArch)
- : llvmArchToLegacyVCArch(TargetArch));
+ if (IsDevDivInternal) {
+ llvm::sys::path::append(Path, "lib", llvmArchToDevDivInternalArch(TargetArch));
+ } else if (IsVS2017OrNewer) {
+ llvm::sys::path::append(Path, "lib", llvmArchToWindowsSDKArch(TargetArch));
+ } else {
+ llvm::sys::path::append(Path, "lib", llvmArchToLegacyVCArch(TargetArch));
+ }
break;
}
return Path.str();
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