build: use cmake to find the libedit content

Use proper cmake techniques to detect where the libedit package resides.
This allows for the use of libedit from an alternative location which is
needed for supporting cross-compilation.

llvm-svn: 333041

lldb/scripts/Python/modules/readline/CMakeLists.txt

@@ -6,9 +6,12 @@ SET(PYTHON_DIRECTORY python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-
 # Build the readline python module
 include_directories(${PYTHON_INCLUDE_DIR})
 add_library(readline SHARED readline.cpp)
+target_include_directories(readline
+                           PRIVATE
+                             ${libedit_INCLUDE_DIRS})
 
 if (NOT LLDB_DISABLE_LIBEDIT)
-  target_link_libraries(readline ${PYTHON_LIBRARY} edit)
+  target_link_libraries(readline ${PYTHON_LIBRARY} ${libedit_LIBRARIES})
 else()
   target_link_libraries(readline ${PYTHON_LIBRARY})
 endif()