[Modules] Extend Darwin hack to include the modification time of SystemVersion.plist.
Fixes <rdar://problem/13856838>.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181635 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 9c8eea1..6af3663 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -30,6 +30,7 @@
#include "llvm/Support/Host.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/system_error.h"
+#include <sys/stat.h>
using namespace clang;
//===----------------------------------------------------------------------===//
@@ -1689,7 +1690,8 @@
hsOpts.UseStandardCXXIncludes,
hsOpts.UseLibcxx);
- // Darwin-specific hack: if we have a sysroot, use the contents of
+ // Darwin-specific hack: if we have a sysroot, use the contents and
+ // modification time of
// $sysroot/System/Library/CoreServices/SystemVersion.plist
// as part of the module hash.
if (!hsOpts.Sysroot.empty()) {
@@ -1702,6 +1704,10 @@
llvm::sys::path::append(systemVersionFile, "SystemVersion.plist");
if (!llvm::MemoryBuffer::getFile(systemVersionFile, buffer)) {
code = hash_combine(code, buffer.get()->getBuffer());
+
+ struct stat statBuf;
+ if (stat(systemVersionFile.c_str(), &statBuf) == 0)
+ code = hash_combine(code, statBuf.st_mtime);
}
}