[ASan] Optional support for dynamic ASan runtime on Linux.

Based on http://llvm-reviews.chandlerc.com/D3042 by Yuri Gribov!


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@205308 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/Modules/AddCompilerRT.cmake b/cmake/Modules/AddCompilerRT.cmake
index 556ada4..82947ea 100644
--- a/cmake/Modules/AddCompilerRT.cmake
+++ b/cmake/Modules/AddCompilerRT.cmake
@@ -45,7 +45,7 @@
 #                         DEFS <compile definitions>)
 macro(add_compiler_rt_runtime name arch type)
   if(CAN_TARGET_${arch})
-    parse_arguments(LIB "SOURCES;CFLAGS;DEFS" "" ${ARGN})
+    parse_arguments(LIB "SOURCES;CFLAGS;DEFS;OUTPUT_NAME" "" ${ARGN})
     add_library(${name} ${type} ${LIB_SOURCES})
     # Setup compile flags and definitions.
     set_target_compile_flags(${name}
@@ -58,6 +58,10 @@
     set_target_properties(${name} PROPERTIES
       ARCHIVE_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR}
       LIBRARY_OUTPUT_DIRECTORY ${COMPILER_RT_LIBRARY_OUTPUT_DIR})
+    if (LIB_OUTPUT_NAME)
+      set_target_properties(${name} PROPERTIES
+        OUTPUT_NAME ${LIB_OUTPUT_NAME})
+    endif()
     # Add installation command.
     install(TARGETS ${name}
       ARCHIVE DESTINATION ${COMPILER_RT_LIBRARY_INSTALL_DIR}