Under certain terrible circumstances (<rdar://problem/10805775>),
top-level frameworks can actually be symlinked over to embedded
frameworks, and accessed via the top-level framework's headers. In
this case, we need to determine that the framework was *actually* an
embedded framework, so we can load the appropriate top-level module.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164620 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/HeaderSearch.cpp b/lib/Lex/HeaderSearch.cpp
index e793ea1..33bba9b 100644
--- a/lib/Lex/HeaderSearch.cpp
+++ b/lib/Lex/HeaderSearch.cpp
@@ -905,7 +905,20 @@
SubmodulePath.push_back(Name);
// Walk the directory structure to find any enclosing frameworks.
+#ifdef LLVM_ON_UNIX
+ // Note: as an egregious but useful hack we use the real path here, because
+ // frameworks moving from top-level frameworks to embedded frameworks tend
+ // to be symlinked from the top-level location to the embedded location,
+ // and we need to resolve lookups as if we had found the embedded location.
+ char RealDirName[PATH_MAX];
+ StringRef DirName;
+ if (realpath(Dir->getName(), RealDirName))
+ DirName = RealDirName;
+ else
+ DirName = Dir->getName();
+#else
StringRef DirName = Dir->getName();
+#endif
do {
// Get the parent directory name.
DirName = llvm::sys::path::parent_path(DirName);