[compiler-rt] b979263 - [compiler-rt] Make use of undefined symbols configurable

[Petr Hosek via llvm-commits]

Author: Petr Hosek
Date: 2021-06-22T11:49:31-07:00
New Revision: b9792638b0bfb308e0c7c125ac78f4ebf910c11b

URL: https://github.com/llvm/llvm-project/commit/b9792638b0bfb308e0c7c125ac78f4ebf910c11b
DIFF: https://github.com/llvm/llvm-project/commit/b9792638b0bfb308e0c7c125ac78f4ebf910c11b.diff

LOG: [compiler-rt] Make use of undefined symbols configurable

We want to disable the use of undefined symbols on Fuchsia, but there
are cases where it might be desirable so may it configurable.

Differential Revision: https://reviews.llvm.org/D104728

Added: 
    

Modified: 
    compiler-rt/CMakeLists.txt

Removed: 
    


################################################################################
diff  --git a/compiler-rt/CMakeLists.txt b/compiler-rt/CMakeLists.txt
index 5d0e617a5406..24018ca78884 100644
--- a/compiler-rt/CMakeLists.txt
+++ b/compiler-rt/CMakeLists.txt
@@ -437,10 +437,18 @@ else()
 endif()
 
 append_list_if(COMPILER_RT_HAS_LIBC c SANITIZER_COMMON_LINK_LIBS)
+if("${CMAKE_SYSTEM_NAME}" STREQUAL "Fuchsia")
+  list(APPEND SANITIZER_COMMON_LINK_LIBS zircon)
+endif()
 
 if("${CMAKE_SYSTEM_NAME}" STREQUAL "Fuchsia")
+  set(SANITIZER_NO_UNDEFINED_SYMBOLS_DEFAULT ON)
+else()
+  set(SANITIZER_NO_UNDEFINED_SYMBOLS_DEFAULT OFF)
+endif
+option(SANITIZER_NO_UNDEFINED_SYMBOLS ${SANITIZER_NO_UNDEFINED_SYMBOLS_DEFAULT})
+if (SANITIZER_NO_UNDEFINED_SYMBOLS)
   list(APPEND SANITIZER_COMMON_LINK_FLAGS -Wl,-z,defs)
-  list(APPEND SANITIZER_COMMON_LINK_LIBS zircon)
 endif()
 
 # TODO: COMPILER_RT_COMMON_CFLAGS and COMPILER_RT_COMMON_LINK_FLAGS are