From 8756a8db5b14fac4ad7e3a0a11cc0b3c115e826d Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Tue, 23 Jun 2009 18:30:17 +0000
Subject: [PATCH] CMake: remove support for llvm-config-generated dependencies
 in the build

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73979 91177308-0d34-0410-b5e6-96231b3b80d8
---
 CMakeLists.txt                 | 18 -------------
 cmake/modules/AddLLVM.cmake    |  6 +----
 cmake/modules/LLVMConfig.cmake | 46 ++--------------------------------
 tools/CMakeLists.txt           |  4 ++-
 4 files changed, 6 insertions(+), 68 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2ee79a568d3..d94506ff463 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -100,24 +100,6 @@ configure_file(
 
 set(llvm_builded_incs_dir ${LLVM_BINARY_DIR}/include/llvm)
 
-# The USE_EXPLICIT_DEPENDENCIES variable will be TRUE to indicate that
-# we should use the library dependencies explicitly specified in the
-# CMakeLists.txt files rather than those determined by
-# llvm-config. This value must be true for non-make and IDE
-# generators.
-if (MSVC_IDE)
-  set(DEFAULT_USE_EXPLICIT_DEPENDENCIES ON)
-elseif (XCODE)
-  set(DEFAULT_USE_EXPLICIT_DEPENDENCIES ON)
-else ()
- set(DEFAULT_USE_EXPLICIT_DEPENDENCIES OFF)
-endif ()
-
-option(USE_EXPLICIT_DEPENDENCIES 
-  "Use explicit dependencies instead of llvm-config" 
-  ${DEFAULT_USE_EXPLICIT_DEPENDENCIES})
-mark_as_advanced(USE_EXPLICIT_DEPENDENCIES)
-
 # Add path for custom modules
 set(CMAKE_MODULE_PATH
   ${CMAKE_MODULE_PATH}
diff --git a/cmake/modules/AddLLVM.cmake b/cmake/modules/AddLLVM.cmake
index 6dd1e475cf6..b196c63e7be 100755
--- a/cmake/modules/AddLLVM.cmake
+++ b/cmake/modules/AddLLVM.cmake
@@ -26,11 +26,7 @@ macro(add_llvm_executable name)
   if( LLVM_LINK_COMPONENTS )
     llvm_config(${name} ${LLVM_LINK_COMPONENTS})
   endif( LLVM_LINK_COMPONENTS )
-  if( USE_EXPLICIT_DEPENDENCIES )
-    target_link_libraries(${name} ${llvm_libs})
-  else( )
-    add_dependencies(${name} llvm-config.target)
-  endif( )
+  target_link_libraries(${name} ${llvm_libs})
   get_system_libs(llvm_system_libs)
   if( llvm_system_libs )
     target_link_libraries(${name} ${llvm_system_libs})
diff --git a/cmake/modules/LLVMConfig.cmake b/cmake/modules/LLVMConfig.cmake
index fd924951874..5fa08a39d6a 100755
--- a/cmake/modules/LLVMConfig.cmake
+++ b/cmake/modules/LLVMConfig.cmake
@@ -20,12 +20,7 @@ endfunction(get_system_libs)
 
 
 macro(llvm_config executable)
-  # extra args is the list of link components.
-  if( USE_EXPLICIT_DEPENDENCIES )
-    explicit_llvm_config(${executable} ${ARGN})
-  else( )
-    nix_llvm_config(${executable} ${ARGN})
-  endif( )
+  explicit_llvm_config(${executable} ${ARGN})
 endmacro(llvm_config)
 
 
@@ -127,44 +122,7 @@ function(explicit_map_components_to_libraries out_libs)
   set(${out_libs} ${result} PARENT_SCOPE)
 endfunction(explicit_map_components_to_libraries)
 
-
-macro(nix_llvm_config executable)
-  set(lc "")
-  foreach(c ${ARGN})
-    set(lc "${lc} ${c}")
-  endforeach(c)
-  if( NOT HAVE_LLVM_CONFIG )
-    target_link_libraries(${executable}
-      "`${LLVM_TOOLS_BINARY_DIR}/llvm-config --libs ${lc}`")
-  else( NOT HAVE_LLVM_CONFIG )
-    # tbi: Error handling.
-    if( NOT PERL_EXECUTABLE )
-      message(FATAL_ERROR "Perl required but not found!")
-    endif( NOT PERL_EXECUTABLE )
-    execute_process(
-      COMMAND sh -c "${PERL_EXECUTABLE} ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/llvm-config --libs ${lc}"
-      RESULT_VARIABLE rv
-      OUTPUT_VARIABLE libs
-      OUTPUT_STRIP_TRAILING_WHITESPACE)
-    if(NOT rv EQUAL 0)
-      message(FATAL_ERROR "llvm-config failed for executable ${executable}")
-    endif(NOT rv EQUAL 0)
-    string(REPLACE " " ";" libs ${libs})
-    foreach(c ${libs})
-      if(c MATCHES ".*\\.o")
-	get_filename_component(fn ${c} NAME)
-	target_link_libraries(${executable}
-	  ${CMAKE_ARCHIVE_OUTPUT_DIRECTORY}/${CMAKE_CFG_INTDIR}/${fn})
-      else(c MATCHES ".*\\.o")
-	string(REPLACE "-l" "" fn ${c})
-	target_link_libraries(${executable} ${fn})
-      endif(c MATCHES ".*\\.o")
-    endforeach(c)
-  endif( NOT HAVE_LLVM_CONFIG )
-endmacro(nix_llvm_config)
-
-
-# This data is used on MSVC for stablishing executable/library
+# This data is used to establish executable/library
 # dependencies.  Comes from the llvm-config script, which is built and
 # installed on the bin directory for MinGW or Linux. At the end of the
 # script, you'll see lines like this:
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 7191d803541..1273c25cd79 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -2,7 +2,9 @@
 # large and three small executables. This is done to minimize memory load
 # in parallel builds.  Please retain this ordering.
 
-if (NOT USE_EXPLICIT_DEPENDENCIES)
+# FIXME: We don't yet have the ability to build llvm-config with CMake
+# based on explicit dependencies.
+if (FALSE)
  add_subdirectory(llvm-config)
 endif()
 
-- 
2.34.1