[compiler-rt] [rtsan] Add dl, rt, m, and log libraries as unit test dependencies, get rid of atomic (PR #98264)

[Chris Apple via llvm-commits]

https://github.com/cjappl created https://github.com/llvm/llvm-project/pull/98264

Fixing test failures in #98256 

There are two issues being fixed here:

```
ld.lld: error: undefined symbol: dlvsym
ld.lld: error: undefined symbol: dlvsym
```

Fixed by linking dl

```
FAILED: ... -lstdc++ -no-pie -pthread -latomic -m64
/opt/rh/devtoolset-11/root/usr/lib/gcc/ppc64-redhat-linux/11/../../../../bin/ld: cannot find /usr/lib64/libatomic.so.1
```

Fixed by removing atomic from the dependencies, I don't think we were even using it.

I added in all of the dependencies used by the parent library in the tests, hopefully getting ahead of any other issues, adding rt and m, even if we haven't had issues with them yet 

>From 1f31c3f92c384235acb07be806cb6ffd17b57210 Mon Sep 17 00:00:00 2001
From: Chris Apple <14171107+cjappl at users.noreply.github.com>
Date: Tue, 9 Jul 2024 19:18:10 -0700
Subject: [PATCH] [rtsan] Add dl, rt, m, and log libraries as unit test
 dependencies

---
 compiler-rt/lib/rtsan/tests/CMakeLists.txt | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/compiler-rt/lib/rtsan/tests/CMakeLists.txt b/compiler-rt/lib/rtsan/tests/CMakeLists.txt
index a379e4029633e..9eda116541ae3 100644
--- a/compiler-rt/lib/rtsan/tests/CMakeLists.txt
+++ b/compiler-rt/lib/rtsan/tests/CMakeLists.txt
@@ -36,15 +36,17 @@ set(RTSAN_UNITTEST_LINK_FLAGS
   ${SANITIZER_TEST_CXX_LIBRARIES}
   -no-pie)
 
+append_list_if(COMPILER_RT_HAS_LIBDL -ldl RTSAN_UNITTEST_LINK_FLAGS)
+append_list_if(COMPILER_RT_HAS_LIBRT -lrt RTSAN_UNITTEST_LINK_FLAGS)
+append_list_if(COMPILER_RT_HAS_LIBM -lm RTSAN_UNITTEST_LINK_FLAGS)
 append_list_if(COMPILER_RT_HAS_LIBPTHREAD -pthread RTSAN_UNITTEST_LINK_FLAGS)
+append_list_if(COMPILER_RT_HAS_LIBLOG -llog RTSAN_UNITTEST_LINK_FLAGS)
 
 if (APPLE)
   add_weak_symbols("sanitizer_common" WEAK_SYMBOL_LINK_FLAGS)
   list(APPEND RTSAN_UNITTEST_LINK_FLAGS ${WEAK_SYMBOL_LINK_FLAGS})
   list(APPEND RTSAN_UNITTEST_LINK_FLAGS ${DARWIN_osx_LINK_FLAGS})
   list(APPEND RTSAN_UNITTEST_CFLAGS ${DARWIN_osx_CFLAGS})
-else()
-  list(APPEND RTSAN_UNITTEST_LINK_FLAGS -latomic)
 endif()
 
 set(COMPILER_RT_GOOGLETEST_SOURCES ${COMPILER_RT_GTEST_SOURCE} ${COMPILER_RT_GMOCK_SOURCE})