[compiler-rt] r370153 - [compiler-rt] Don't use libcxx if it's not enabled by LLVM_ENABLE_PROJECTS

[Vitaly Buka via llvm-commits]

Author: vitalybuka
Date: Tue Aug 27 19:41:14 2019
New Revision: 370153

URL: http://llvm.org/viewvc/llvm-project?rev=370153&view=rev
Log:
[compiler-rt] Don't use libcxx if it's not enabled by LLVM_ENABLE_PROJECTS

This fixes sanitizer-x86_64-linux-fuzzer which switched to new layout and not it
can't link as libcxx is always there.
We should support and tests libcxx but still it was unexpected that libfuzzer
ignored LLVM_ENABLE_PROJECTS_USED.

Modified:
    compiler-rt/trunk/CMakeLists.txt

Modified: compiler-rt/trunk/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/CMakeLists.txt?rev=370153&r1=370152&r2=370153&view=diff
==============================================================================
--- compiler-rt/trunk/CMakeLists.txt (original)
+++ compiler-rt/trunk/CMakeLists.txt Tue Aug 27 19:41:14 2019
@@ -463,24 +463,30 @@ add_subdirectory(include)
 option(COMPILER_RT_USE_LIBCXX
   "Enable compiler-rt to use libc++ from the source tree" ON)
 if(COMPILER_RT_USE_LIBCXX)
-  foreach(path IN ITEMS ${LLVM_MAIN_SRC_DIR}/projects/libcxx
-                        ${LLVM_MAIN_SRC_DIR}/runtimes/libcxx
-                        ${LLVM_MAIN_SRC_DIR}/../libcxx
-                        ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR})
-    if(IS_DIRECTORY ${path})
-      set(COMPILER_RT_LIBCXX_PATH ${path})
-      break()
-    endif()
-  endforeach()
-  foreach(path IN ITEMS ${LLVM_MAIN_SRC_DIR}/projects/libcxxabi
-                        ${LLVM_MAIN_SRC_DIR}/runtimes/libcxxabi
-                        ${LLVM_MAIN_SRC_DIR}/../libcxxabi
-                        ${LLVM_EXTERNAL_LIBCXXABI_SOURCE_DIR})
-    if(IS_DIRECTORY ${path})
-      set(COMPILER_RT_LIBCXXABI_PATH ${path})
-      break()
-    endif()
-  endforeach()
+  if(LLVM_ENABLE_PROJECTS_USED)
+    # Don't use libcxx if LLVM_ENABLE_PROJECTS does not enable it.
+    set(COMPILER_RT_LIBCXX_PATH ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR})
+    set(COMPILER_RT_LIBCXXABI_PATH ${LLVM_EXTERNAL_LIBCXXABI_SOURCE_DIR})
+  else()
+    foreach(path IN ITEMS ${LLVM_MAIN_SRC_DIR}/projects/libcxx
+                          ${LLVM_MAIN_SRC_DIR}/runtimes/libcxx
+                          ${LLVM_MAIN_SRC_DIR}/../libcxx
+                          ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR})
+      if(IS_DIRECTORY ${path})
+        set(COMPILER_RT_LIBCXX_PATH ${path})
+        break()
+      endif()
+    endforeach()
+    foreach(path IN ITEMS ${LLVM_MAIN_SRC_DIR}/projects/libcxxabi
+                          ${LLVM_MAIN_SRC_DIR}/runtimes/libcxxabi
+                          ${LLVM_MAIN_SRC_DIR}/../libcxxabi
+                          ${LLVM_EXTERNAL_LIBCXXABI_SOURCE_DIR})
+      if(IS_DIRECTORY ${path})
+        set(COMPILER_RT_LIBCXXABI_PATH ${path})
+        break()
+      endif()
+    endforeach()
+  endif()
 endif()
 
 set(COMPILER_RT_LLD_PATH ${LLVM_MAIN_SRC_DIR}/tools/lld)