================
@@ -1370,19 +1370,47 @@ ToolChain::CXXStdlibType
ToolChain::GetCXXStdlibType(const ArgList &Args) const{
return *cxxStdlibType;
}
+static void ResolveAndAddSystemIncludePath(const ArgList &DriverArgs,
+ ArgStringList &CC1Args,
+ const Twine &Path) {
+ bool Canonicalize =
+ DriverArgs.hasFlag(options::OPT_canonical_prefixes,
+ options::OPT_no_canonical_prefixes, true);
+
+ if (!Canonicalize) {
+ CC1Args.push_back(DriverArgs.MakeArgString(Path));
+ return;
+ }
+
+ // We canonicalise system include paths that were added automatically if
+ // that yields a shorter path since those can end up quite long otherwise.
+ //
+ // While we would ideally prefer to use FileManager for this, there doesn't
+ // seem to be a way to obtain one in here, so we just resolve these via the
+ // real file system; most system libraries will hopefully correspond to
+ // actual files.
+ IntrusiveRefCntPtr<vfs::FileSystem> VFS = vfs::getRealFileSystem();
+ SmallString<256> Canonical, PathStorage;
+ StringRef SimplifiedPath = Path.toStringRef(PathStorage);
+ if (!VFS->getRealPath(SimplifiedPath, Canonical) &&
+ Canonical.size() < SimplifiedPath.size())
----------------
jyknight wrote:
Should it really be conditional on length? That seems kinda weird to me.
https://github.com/llvm/llvm-project/pull/148745
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