Use library discovery for curses and panel

[krytarowski]

Summary

This approach is tunable with custom paths for curses library.

It also detects whether there are requirements met.

I make use of it on NetBSD.

cmake/LLDBDependencies.cmake

set( CLANG_USED_LIBS
   )
 
 set(LLDB_SYSTEM_LIBS)
 if (NOT CMAKE_SYSTEM_NAME MATCHES "Windows" AND NOT __ANDROID_NDK__)
   if (NOT LLDB_DISABLE_LIBEDIT)
     list(APPEND LLDB_SYSTEM_LIBS edit)
   endif()
   if (NOT LLDB_DISABLE_CURSES)
-    list(APPEND LLDB_SYSTEM_LIBS panel ncurses)
+    list(APPEND LLDB_SYSTEM_LIBS ${CURSES_LIBRARIES})
     if(LLVM_ENABLE_TERMINFO AND HAVE_TERMINFO)
       list(APPEND LLDB_SYSTEM_LIBS ${TERMINFO_LIBS})
     endif()
   endif()
 endif()
 # On FreeBSD/NetBSD backtrace() is provided by libexecinfo, not libc.
 if (CMAKE_SYSTEM_NAME MATCHES "FreeBSD" OR CMAKE_SYSTEM_NAME MATCHES "NetBSD")
   list(APPEND LLDB_SYSTEM_LIBS execinfo)

cmake/modules/LLDBConfig.cmake

if (CMAKE_SYSTEM_NAME MATCHES "Darwin")
   find_library(CARBON_LIBRARY Carbon)
   find_library(FOUNDATION_LIBRARY Foundation)
   find_library(CORE_FOUNDATION_LIBRARY CoreFoundation)
   find_library(CORE_SERVICES_LIBRARY CoreServices)
   find_library(SECURITY_LIBRARY Security)
   find_library(DEBUG_SYMBOLS_LIBRARY DebugSymbols PATHS "/System/Library/PrivateFrameworks")
 
   add_definitions( -DLIBXML2_DEFINED )
-  list(APPEND system_libs xml2 ncurses panel)
+  list(APPEND system_libs xml2 ${CURSES_LIBRARIES})
   list(APPEND system_libs ${CARBON_LIBRARY} ${FOUNDATION_LIBRARY}
   ${CORE_FOUNDATION_LIBRARY} ${CORE_SERVICES_LIBRARY} ${SECURITY_LIBRARY}
   ${DEBUG_SYMBOLS_LIBRARY})
 
 else()
   if (LIBXML2_FOUND)
     add_definitions( -DLIBXML2_DEFINED )
     list(APPEND system_libs ${LIBXML2_LIBRARIES})

 
 # Figure out if lldb could use debugserver.  If so, then we'll
 # ensure we build debugserver when we build lldb.
 if ( CMAKE_SYSTEM_NAME MATCHES "Darwin" )
     set(LLDB_CAN_USE_DEBUGSERVER 1)
 else()
     set(LLDB_CAN_USE_DEBUGSERVER 0)
 endif()
+
+if (NOT LLDB_DISABLE_CURSES)
+    find_package(Curses REQUIRED)
+
+    find_library(CURSES_PANEL_LIBRARY NAMES panel DOC "The curses panel library")
+    if (NOT CURSES_PANEL_LIBRARY)
+        message(FATAL_ERROR "A required curses' panel library not found.")
+    endif ()
+
+    # Add panels to the library path
+    set (CURSES_LIBRARIES ${CURSES_LIBRARIES} ${CURSES_PANEL_LIBRARY})
+
+    list(APPEND system_libs ${CURSES_LIBRARIES})
+    include_directories(${CURSES_INCLUDE_DIR})
+endif ()