[CMake] add_llvm_symbol_exports: Use unique name for each target.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198164 91177308-0d34-0410-b5e6-96231b3b80d8

Author: chapuni

cmake/modules/AddLLVM.cmake

@@ -4,7 +4,7 @@ include(LLVM-Config)
 
 function(add_llvm_symbol_exports target_name export_file)
   if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
-    set(native_export_file "symbol.exports")
+    set(native_export_file "${target_name}.exports")
     add_custom_command(OUTPUT ${native_export_file}
       COMMAND sed -e "s/^/_/" < ${export_file} > ${native_export_file}
       DEPENDS ${export_file}
@@ -14,7 +14,7 @@ function(add_llvm_symbol_exports target_name export_file)
                  LINK_FLAGS " -Wl,-exported_symbols_list,${CMAKE_CURRENT_BINARY_DIR}/${native_export_file}")
   elseif(LLVM_HAVE_LINK_VERSION_SCRIPT)
     # Gold and BFD ld require a version script rather than a plain list.
-    set(native_export_file "symbol.exports")
+    set(native_export_file "${target_name}.exports")
     # FIXME: Don't write the "local:" line on OpenBSD.
     add_custom_command(OUTPUT ${native_export_file}
       COMMAND echo "{" > ${native_export_file}
@@ -28,7 +28,7 @@ function(add_llvm_symbol_exports target_name export_file)
     set_property(TARGET ${target_name} APPEND_STRING PROPERTY
                  LINK_FLAGS " -Wl,--version-script,${CMAKE_CURRENT_BINARY_DIR}/${native_export_file}")
   else()
-    set(native_export_file "symbol.def")
+    set(native_export_file "${target_name}.def")
 
     set(CAT "type")
     if(CYGWIN)