[CMake] Teach the build system to codesign built products

Automatically codesign all executables and dynamic libraries if a
codesigning identity is given (via LLVM_CODESIGNING_IDENTITY). This
option is darwin only for now.

Also update platforms/iOS.cmake to pick up the right versions of
codesign and codesign_allocate.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336708 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 49 insertions, 0 deletions

diff --git a/cmake/modules/AddLLVM.cmake b/cmake/modules/AddLLVM.cmake
index 2f88f585db2..5ea2024d1c8 100644
--- a/cmake/modules/AddLLVM.cmake
+++ b/cmake/modules/AddLLVM.cmake
@@ -580,6 +580,7 @@ function(llvm_add_library name)
 
   if(ARG_SHARED OR ARG_MODULE)
     llvm_externalize_debuginfo(${name})
+    llvm_codesign(${name})
   endif()
 endfunction()
 
@@ -784,6 +785,8 @@ macro(add_llvm_executable name)
     # API for all shared libaries loaded by this executable.
     target_link_libraries(${name} PRIVATE ${LLVM_PTHREAD_LIB})
   endif()
+
+  llvm_codesign(${name})
 endmacro(add_llvm_executable name)
 
 function(export_executable_symbols target)
@@ -1590,6 +1593,32 @@ function(llvm_externalize_debuginfo name)
   endif()
 endfunction()
 
+function(llvm_codesign name)
+  if(NOT LLVM_CODESIGNING_IDENTITY)
+    return()
+  endif()
+
+  if(APPLE)
+    if(NOT CMAKE_CODESIGN)
+      set(CMAKE_CODESIGN xcrun codesign)
+    endif()
+    if(NOT CMAKE_CODESIGN_ALLOCATE)
+      execute_process(
+        COMMAND xcrun -f codesign_allocate
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+        OUTPUT_VARIABLE CMAKE_CODESIGN_ALLOCATE
+      )
+    endif()
+    add_custom_command(
+      TARGET ${name} POST_BUILD
+      COMMAND ${CMAKE_COMMAND} -E
+              env CODESIGN_ALLOCATE=${CMAKE_CODESIGN_ALLOCATE}
+              ${CMAKE_CODESIGN} -s ${LLVM_CODESIGNING_IDENTITY}
+              $<TARGET_FILE:${name}>
+    )
+  endif()
+endfunction()
+
 function(llvm_setup_rpath name)
   if(CMAKE_INSTALL_RPATH)
     return()
diff --git a/cmake/platforms/iOS.cmake b/cmake/platforms/iOS.cmake
index d15db933a6b..69f8479721d 100644
--- a/cmake/platforms/iOS.cmake
+++ b/cmake/platforms/iOS.cmake
@@ -80,3 +80,23 @@ IF(NOT CMAKE_LIBTOOL)
   SET(CMAKE_LIBTOOL ${CMAKE_LIBTOOL_val} CACHE FILEPATH "Libtool")
   message(STATUS "Using libtool ${CMAKE_LIBTOOL}")
 ENDIF()
+
+IF(NOT CMAKE_CODESIGN)
+  execute_process(COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT} -find codesign
+   OUTPUT_VARIABLE CMAKE_CODESIGN_val
+   ERROR_QUIET
+   OUTPUT_STRIP_TRAILING_WHITESPACE)
+  SET(CMAKE_CODESIGN ${CMAKE_CODESIGN_val} CACHE FILEPATH "Codesign")
+  message(STATUS "Using codesign ${CMAKE_CODESIGN}")
+ENDIF()
+
+IF(NOT CMAKE_CODESIGN_ALLOCATE)
+  execute_process(
+    COMMAND xcrun -sdk ${CMAKE_OSX_SYSROOT} -find codesign_allocate
+    OUTPUT_VARIABLE CMAKE_CODESIGN_ALLOCATE_val
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+  SET(CMAKE_CODESIGN_ALLOCATE ${CMAKE_CODESIGN_ALLOCATE_val} CACHE
+      FILEPATH "Codesign_Allocate")
+  message(STATUS "Using codesign_allocate ${CMAKE_CODESIGN_ALLOCATE}")
+ENDIF()