[NFC] Add SUPPORT_PLUGINS to add_llvm_executable()

Summary:
this allows us to move logic about when it is appropriate set
LLVM_NO_DEAD_STRIP out of each tool and into add_llvm_executable,
which will enable future platform specific handling.

This is a follow on to the reverted D69356

Reviewers: hubert.reinterpretcast, beanz, lhames

Reviewed By: beanz

Subscribers: mgorny, cfe-commits, llvm-commits

Tags: #clang, #llvm

Differential Revision: https://reviews.llvm.org/D69638

clang/tools/driver/CMakeLists.txt

@@ -19,10 +19,9 @@ set( LLVM_LINK_COMPONENTS
 
 option(CLANG_PLUGIN_SUPPORT "Build clang with plugin support" ON)
 
-# Support plugins. This must be before add_clang_executable as it reads
-# LLVM_NO_DEAD_STRIP.
+# Support plugins.
 if(CLANG_PLUGIN_SUPPORT)
-  set(LLVM_NO_DEAD_STRIP 1)
+  set(support_plugins SUPPORT_PLUGINS)
 endif()
 
 if(NOT CLANG_BUILT_STANDALONE)
@@ -37,6 +36,7 @@ add_clang_tool(clang
 
   DEPENDS
   ${tablegen_deps}
+  ${support_plugins}
   )
 
 clang_target_link_libraries(clang

llvm/cmake/modules/AddLLVM.cmake

@@ -732,7 +732,7 @@ endmacro(add_llvm_library name)
 
 macro(add_llvm_executable name)
   cmake_parse_arguments(ARG
-    "DISABLE_LLVM_LINK_LLVM_DYLIB;IGNORE_EXTERNALIZE_DEBUGINFO;NO_INSTALL_RPATH"
+    "DISABLE_LLVM_LINK_LLVM_DYLIB;IGNORE_EXTERNALIZE_DEBUGINFO;NO_INSTALL_RPATH;SUPPORT_PLUGINS"
     "ENTITLEMENTS;BUNDLE_PATH"
     "DEPENDS"
     ${ARGN})
@@ -782,6 +782,11 @@ macro(add_llvm_executable name)
   if(NOT LLVM_ENABLE_OBJLIB)
     llvm_update_compile_flags(${name})
   endif()
+
+  if (ARG_SUPPORT_PLUGINS)
+    set(LLVM_NO_DEAD_STRIP On)
+  endif()
+
   add_link_opts( ${name} )
 
   # Do not add -Dname_EXPORTS to the command-line when building files in this

llvm/tools/bugpoint/CMakeLists.txt

@@ -21,9 +21,6 @@ set(LLVM_LINK_COMPONENTS
   Vectorize
   )
 
-# Support plugins.
-set(LLVM_NO_DEAD_STRIP 1)
-
 add_llvm_tool(bugpoint
   BugDriver.cpp
   CrashDebugger.cpp
@@ -37,6 +34,7 @@ add_llvm_tool(bugpoint
 
   DEPENDS
   intrinsics_gen
+  SUPPORT_PLUGINS
   )
 export_executable_symbols(bugpoint)
 

llvm/tools/llc/CMakeLists.txt

@@ -19,13 +19,11 @@ set(LLVM_LINK_COMPONENTS
   Vectorize
   )
 
-# Support plugins.
-set(LLVM_NO_DEAD_STRIP 1)
-
 add_llvm_tool(llc
   llc.cpp
 
   DEPENDS
   intrinsics_gen
+  SUPPORT_PLUGINS
   )
 export_executable_symbols(llc)

llvm/tools/opt/CMakeLists.txt

@@ -24,9 +24,6 @@ set(LLVM_LINK_COMPONENTS
   Passes
   )
 
-# Support plugins.
-set(LLVM_NO_DEAD_STRIP 1)
-
 add_llvm_tool(opt
   AnalysisWrappers.cpp
   BreakpointPrinter.cpp
@@ -39,6 +36,7 @@ add_llvm_tool(opt
 
   DEPENDS
   intrinsics_gen
+  SUPPORT_PLUGINS
   )
 export_executable_symbols(opt)