From 0e4063eb09c0b47d2e52b3b92478d993db76c163 Mon Sep 17 00:00:00 2001
From: Alexey Samsonov <samsonov@google.com>
Date: Tue, 4 Mar 2014 13:28:21 +0000
Subject: [CMake] Test for libdl and libpthread presence

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@202847 91177308-0d34-0410-b5e6-96231b3b80d8
---
 cmake/config-ix.cmake                     | 5 +++++
 lib/asan/tests/CMakeLists.txt             | 8 +++-----
 lib/msan/tests/CMakeLists.txt             | 4 ++--
 lib/sanitizer_common/tests/CMakeLists.txt | 6 ++++--
 4 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 3d514ecdd..7753c38f1 100644
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -1,4 +1,5 @@
 include(CheckCXXCompilerFlag)
+include(CheckLibraryExists)
 include(CheckSymbolExists)
 
 # CodeGen options.
@@ -38,3 +39,7 @@ check_cxx_compiler_flag(/wd4722 COMPILER_RT_HAS_WD4722_FLAG)
 
 # Symbols.
 check_symbol_exists(__func__ "" COMPILER_RT_HAS_FUNC_SYMBOL)
+
+# Libraries.
+check_library_exists(dl dlopen "" COMPILER_RT_HAS_LIBDL)
+check_library_exists(pthread pthread_create "" COMPILER_RT_HAS_LIBPTHREAD)
diff --git a/lib/asan/tests/CMakeLists.txt b/lib/asan/tests/CMakeLists.txt
index d5040f036..15864c4be 100644
--- a/lib/asan/tests/CMakeLists.txt
+++ b/lib/asan/tests/CMakeLists.txt
@@ -69,11 +69,9 @@ if(NOT ANDROID)
 endif()
 
 set(ASAN_UNITTEST_NOINST_LINKFLAGS
-  ${ASAN_UNITTEST_COMMON_LINKFLAGS}
-  -ldl -lm)
-if(NOT ANDROID)
-  list(APPEND ASAN_UNITTEST_NOINST_LINKFLAGS -lpthread)
-endif()
+  ${ASAN_UNITTEST_COMMON_LINKFLAGS} -lm)
+append_if(ASAN_UNITTEST_NOINST_LINKFLAGS COMPILER_RT_HAS_LIBDL -ldl)
+append_if(ASAN_UNITTEST_NOINST_LINKFLAGS COMPILER_RT_HAS_LIBPTHREAD -lpthread)
 
 # Compile source for the given architecture, using compiler
 # options in ${ARGN}, and add it to the object list.
diff --git a/lib/msan/tests/CMakeLists.txt b/lib/msan/tests/CMakeLists.txt
index 38eb0d141..0ae96d812 100644
--- a/lib/msan/tests/CMakeLists.txt
+++ b/lib/msan/tests/CMakeLists.txt
@@ -23,11 +23,11 @@ set(MSAN_LIBCXX_CFLAGS
   -mno-omit-leaf-frame-pointer)
 set(MSAN_LIBCXX_LINK_FLAGS
   -nodefaultlibs
-  -lpthread
   -lrt
   -lc
   -lstdc++
   -fsanitize=memory)
+append_if(MSAN_LIBCXX_LINK_FLAGS COMPILER_RT_HAS_LIBPTHREAD -lpthread)
 
 # Unittest sources and build flags.
 set(MSAN_UNITTEST_SOURCES msan_test.cc msan_test_main.cc)
@@ -61,10 +61,10 @@ set(MSAN_UNITTEST_INSTRUMENTED_CFLAGS
 )
 set(MSAN_UNITTEST_LINK_FLAGS
   -fsanitize=memory
-  -ldl
   # FIXME: we build libcxx without cxxabi and need libstdc++ to provide it.
   -lstdc++
 )
+append_if(MSAN_UNITTEST_LINK_FLAGS COMPILER_RT_HAS_LIBDL -ldl)
 set(MSAN_LOADABLE_LINK_FLAGS
   -fsanitize=memory
   -shared
diff --git a/lib/sanitizer_common/tests/CMakeLists.txt b/lib/sanitizer_common/tests/CMakeLists.txt
index 54287956e..1e6b38b61 100644
--- a/lib/sanitizer_common/tests/CMakeLists.txt
+++ b/lib/sanitizer_common/tests/CMakeLists.txt
@@ -41,7 +41,9 @@ set(SANITIZER_TEST_CFLAGS_COMMON
   -Wall -Werror -Werror=sign-compare)
 
 set(SANITIZER_TEST_LINK_FLAGS_COMMON
-  -lstdc++ -ldl)
+  -lstdc++)
+append_if(SANITIZER_TEST_LINK_FLAGS_COMMON COMPILER_RT_HAS_LIBDL -ldl)
+append_if(SANITIZER_TEST_LINK_FLAGS_COMMON COMPILER_RT_HAS_LIBPTHREAD -lpthread)
 
 include_directories(..)
 include_directories(../..)
@@ -96,7 +98,7 @@ macro(add_sanitizer_tests_for_arch arch)
                                ${SANITIZER_COMMON_LIB_NAME}
                        DEPS ${SANITIZER_TEST_OBJECTS} ${SANITIZER_COMMON_LIB}
                        LINK_FLAGS ${SANITIZER_TEST_LINK_FLAGS_COMMON}
-                                  -lpthread ${TARGET_FLAGS})
+                                  ${TARGET_FLAGS})
 
   if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux" AND "${arch}" STREQUAL "x86_64")
     # Test that the libc-independent part of sanitizer_common is indeed
-- 
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