Connect libclang_rt to the build, for specific architectures. This

contains the libraries for Address Sanitizer (asan), Undefined Behavior
Sanitizer (ubsan) and Profile Guided Optimization.

ASan is a fast memory error detector. It can detect the following types
of bugs:

    Out-of-bounds accesses to heap, stack and globals
    Use-after-free
    Use-after-return (to some extent)
    Double-free, invalid free
    Memory leaks (experimental)

Typical slowdown introduced by AddressSanitizer is 2x.

UBSan is a fast and compatible undefined behavior checker. It enables a
number of undefined behavior checks that have small runtime cost and no
impact on address space layout or ABI.

PLEASE NOTE: the sanitizers still have some rough edges on FreeBSD,
particularly on i386.  These will hopefully be smoothed out in the
coming time.

Differential Revision: https://reviews.freebsd.org/D1505

2 files changed, 16 insertions, 0 deletions

diff --git a/etc/mtree/BSD.debug.dist b/etc/mtree/BSD.debug.dist
index 7797a4c4173d..62d33e6ed091 100644
--- a/etc/mtree/BSD.debug.dist
+++ b/etc/mtree/BSD.debug.dist
@@ -24,6 +24,14 @@
             games
             ..
             lib
+                clang
+                    3.5.0
+                        lib
+                            freebsd
+                            ..
+                        ..
+                    ..
+                ..
                 engines
                 ..
                 i18n
diff --git a/etc/mtree/BSD.usr.dist b/etc/mtree/BSD.usr.dist
index 57509847bf22..022db7aa3f21 100644
--- a/etc/mtree/BSD.usr.dist
+++ b/etc/mtree/BSD.usr.dist
@@ -14,6 +14,14 @@
     lib
         aout
         ..
+        clang
+            3.5.0
+                lib
+                    freebsd
+                    ..
+                ..
+            ..
+        ..
         compat
             aout
             ..