From: Akira Hatanaka <ahatanaka@apple.com>
Date: Tue, 7 Jul 2015 08:28:42 +0000 (+0000)
Subject: Add a comment to explain how the decision to pass feature "+long-calls" is made.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=37f3a94e953908ba3767f7637d7647b479989d67;p=clang

Add a comment to explain how the decision to pass feature "+long-calls" is made.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@241568 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 4aa4bf1464..058fdf574d 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -708,6 +708,9 @@ static void getARMTargetFeatures(const Driver &D, const llvm::Triple &Triple,
     Features.insert(Features.begin(), "+v8.1a");
   }
 
+  // Look for the last occurrence of -mlong-calls or -mno-long-calls. If
+  // neither options are specified, see if we are compiling for kernel/kext and
+  // decide whether to pass "+long-calls" based on the OS and its version.
   if (Arg *A = Args.getLastArg(options::OPT_mlong_calls,
                                options::OPT_mno_long_calls)) {
     if (A->getOption().matches(options::OPT_mlong_calls))