fix compatibility in old version cmake

Author: spinpx

.gitignore

@@ -19,3 +19,4 @@ auto/
 /bin/
 obj-intel64/
 .DS_Store
+llvm_mode/build/

llvm_mode/pass/CMakeLists.txt

@@ -12,37 +12,35 @@ else()
     message(FATAL_ERROR "You haven't install LLVM !")
 endif()
 
-if (NOT TARGET LLVMPassConfig)
 
-    EXECUTE_PROCESS(
-        COMMAND cat ${CMAKE_CURRENT_SOURCE_DIR}/../../common/src/config.rs          
-        COMMAND grep "pub const MAP_SIZE_POW2"
-        COMMAND cut -f2 -d "="  
-        COMMAND grep -o "[[:digit:]]*"
-        COMMAND tr -d "\n" 
-        OUTPUT_VARIABLE MAP_SIZE_POW2
-    )
-    message(STATUS "MAP_SIZE_POW2: ${MAP_SIZE_POW2}")
-    
+EXECUTE_PROCESS(
+    COMMAND cat ${CMAKE_CURRENT_SOURCE_DIR}/../../common/src/config.rs          
+    COMMAND grep "pub const MAP_SIZE_POW2"
+    COMMAND cut -f2 -d "="  
+    COMMAND grep -o "[[:digit:]]*"
+    COMMAND tr -d "\n" 
+    OUTPUT_VARIABLE MAP_SIZE_POW2
+)
+message(STATUS "MAP_SIZE_POW2: ${MAP_SIZE_POW2}")
+
+if (NOT TARGET LLVMPassConfig)
     add_library(LLVMPassConfig INTERFACE IMPORTED)
-    # fix pass bug: https://github.com/sampsyo/llvm-pass-skeleton/issues/7#issuecomment-401834287
     set_target_properties(LLVMPassConfig PROPERTIES
         INTERFACE_COMPILE_OPTIONS "-fno-rtti" #-fpic
         INTERFACE_INCLUDE_DIRECTORIES "${LLVM_INCLUDE_DIRS}"
         INTERFACE_LINK_DIRECTORIES "${LLVM_LIBRARY_DIRS}"
-        INTERFACE_LINK_OPTIONS "-Wl,-znodelete"
         INTERFACE_COMPILE_DEFINITIONS "LLVM_VERSION_MAJOR=${LLVM_VERSION_MAJOR};LLVM_VERSION_MINOR=${LLVM_VERSION_MINOR};MAP_SIZE_POW2=${MAP_SIZE_POW2}"
-        # INTERFACE_COMPILE_FEATURES "cxx_std_11"
-    )
-    if(APPLE)
-        set_target_properties(LLVMPassConfig PROPERTIES
-            # User teor2345 reports that this is required to make things work on MacOS X.
-            LINK_FLAGS "-Wl,-flat_namespace -Wl,-undefined,suppress"
+        # INTERFACE_LINK_OPTIONS "-Wl,-znodelete"
     )
-    endif(APPLE)
 endif()
 
-set(CMAKE_CXX_STANDARD 11)
+set (CMAKE_CXX_STANDARD 11)
+# fix pass bug: https://github.com/sampsyo/llvm-pass-skeleton/issues/7#issuecomment-401834287
+set (CMAKE_MODULE_LINKER_FLAGS "-Wl,-znodelete")
+if(APPLE)
+    # User teor2345 reports that this is required to make things work on MacOS X.
+    set (CMAKE_MODULE_LINK_FLAGS "${CMAKE_CXX_LINK_FLAGS} -Wl,-flat_namespace -Wl,-undefined,suppress")
+endif(APPLE)
 
 add_library(UnfoldBranchPass MODULE UnfoldBranchPass.cc)
 target_link_libraries(UnfoldBranchPass LLVMPassConfig)