From 353222262a77e0c9f23dfde1dfb78bfb3fe96c31 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Mon, 11 Jul 2016 16:28:24 -0400
Subject: [PATCH] CMakeParseImplicitLinkInfo: Exclude libclang_rt libraries

These libraries are used for Clang runtime analysis support with
flags like `-fsanitize=memory` and are not actually implicitly
linked libraries.

Fixes #16194.
---
 Modules/CMakeParseImplicitLinkInfo.cmake       | 2 +-
 Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/Modules/CMakeParseImplicitLinkInfo.cmake b/Modules/CMakeParseImplicitLinkInfo.cmake
index ef9a2eb1d..da029bc4d 100644
--- a/Modules/CMakeParseImplicitLinkInfo.cmake
+++ b/Modules/CMakeParseImplicitLinkInfo.cmake
@@ -124,7 +124,7 @@ function(CMAKE_PARSE_IMPLICIT_LINK_INFO text lib_var dir_var fwk_var log_var obj
   # We remove items that are not language-specific.
   set(implicit_libs "")
   foreach(lib IN LISTS implicit_libs_tmp)
-    if("x${lib}" MATCHES "^x(crt.*\\.o|gcc.*|System.*)$")
+    if("x${lib}" MATCHES "^x(crt.*\\.o|gcc.*|System.*|.*libclang_rt.*)$")
       set(log "${log}  remove lib [${lib}]\n")
     elseif(IS_ABSOLUTE "${lib}")
       get_filename_component(abs "${lib}" ABSOLUTE)
diff --git a/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in b/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in
index da614e996..1313dbf32 100644
--- a/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in
+++ b/Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in
@@ -112,6 +112,12 @@ set(linux64_test3_libs "gfortran;m;quadmath;m;c")
 set(linux64_test3_dirs "/usr/lib/gcc/x86_64-redhat-linux/5.1.1;/usr/lib64;/lib64;/usr/lib")
 list(APPEND platforms linux64_test3)
 
+# clang -fsanitize=memory
+set(linux64_clang_sanitize_memory_text [[ "/usr/bin/ld" --hash-style=both --build-id --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o a.out /usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../x86_64-linux-gnu/crt1.o /usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../x86_64-linux-gnu/crti.o /usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/crtbegin.o -L/usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0 -L/usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../x86_64-linux-gnu -L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../.. -L/usr/lib/llvm-3.8/bin/../lib -L/lib -L/usr/lib -whole-archive /usr/lib/llvm-3.8/bin/../lib/clang/3.8.0/lib/linux/libclang_rt.msan-x86_64.a -no-whole-archive --dynamic-list=/usr/lib/llvm-3.8/bin/../lib/clang/3.8.0/lib/linux/libclang_rt.msan-x86_64.a.syms /tmp/dummy-27898d.o --no-as-needed -lpthread -lrt -lm -ldl -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed /usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/crtend.o /usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../x86_64-linux-gnu/crtn.o]])
+set(linux64_clang_sanitize_memory_libs "pthread;rt;m;dl;c")
+set(linux64_clang_sanitize_memory_dirs "/usr/lib/gcc/x86_64-linux-gnu/5.4.0;/usr/lib/x86_64-linux-gnu;/lib/x86_64-linux-gnu;/lib64;/usr/lib;/usr/lib/llvm-3.8/lib;/lib")
+list(APPEND platforms linux64_clang_sanitize_memory)
+
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 # Mac