EXPORTED_SYMBOL_FILE support for cmake

The cmake build didn't support EXPORTED_SYMBOL_FILE. Instead, it had a
Windows-only implementation in tools/lto/CMakeLists.txt, a linux-only
implementation in tools/gold/CMakeLists.txt, and a darwin-only implementation
in tools/clang/tools/libclang/CMakeLists.txt.

This attempts to consolidate these one-offs into a single place. Clients can now
just set LLVM_EXPORTED_SYMBOL_FILE and things (hopefully) Just Work, like in
the make build.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198136 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 5 insertions, 45 deletions

diff --git a/tools/gold/CMakeLists.txt b/tools/gold/CMakeLists.txt
index 2cc132ff78..e0a3359018 100644
--- a/tools/gold/CMakeLists.txt
+++ b/tools/gold/CMakeLists.txt
@@ -1,6 +1,8 @@
 set(LLVM_BINUTILS_INCDIR "" CACHE PATH
   "PATH to binutils/include containing plugin-api.h for gold plugin.")
 
+set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_CURRENT_SOURCE_DIR}/gold.exports)
+
 if( NOT LLVM_BINUTILS_INCDIR )
   # Nothing to say.
 elseif( NOT EXISTS "${LLVM_BINUTILS_INCDIR}/plugin-api.h" )
@@ -17,30 +19,4 @@ else()
   add_llvm_loadable_module(LLVMgold
     gold-plugin.cpp
     )
-
-  # Makefile.rules contains a special cases for OpenBSD, Darwin and
-  # Windows. We restrict ourselves to Linux for the time being.
-  set(srcexp ${CMAKE_CURRENT_SOURCE_DIR}/gold.exports)
-  add_custom_command(OUTPUT exportsfile
-    COMMAND echo "{" > exportsfile
-    COMMAND grep -q "\\<" ${srcexp} && echo "  global:" >> exportsfile || :
-    COMMAND sed -e "s/$/;/" -e "s/^/    /" < ${srcexp} >> exportsfile
-    COMMAND echo "  local: *;" >> exportsfile
-    COMMAND echo "};" >> exportsfile
-    DEPENDS ${srcexp}
-    VERBATIM
-    COMMENT "Creating export file for gold plugin")
-  add_custom_target(gold_exports DEPENDS exportsfile)
-  set_property(DIRECTORY APPEND
-    PROPERTY ADDITIONAL_MAKE_CLEAN_FILES exportsfile)
-
-  # Force re-linking when the exports file changes. Actually, it
-  # forces recompilation of gold-plugin.cpp. The LINK_DEPENDS target
-  # property only works for makefile-based generators.
-  set_property(SOURCE gold-plugin.cpp APPEND PROPERTY
-    OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/exportsfile)
-
-  target_link_libraries(LLVMgold LTO
-                   -Wl,--version-script,${CMAKE_CURRENT_BINARY_DIR}/exportsfile)
-  add_dependencies(LLVMgold gold_exports)
 endif()
diff --git a/tools/lto/CMakeLists.txt b/tools/lto/CMakeLists.txt
index 1874052062..c54c8efee8 100644
--- a/tools/lto/CMakeLists.txt
+++ b/tools/lto/CMakeLists.txt
@@ -14,26 +14,10 @@ set(SOURCES
   lto.cpp
   )
 
-if( NOT CYGWIN AND LLVM_ENABLE_PIC )
-  if ( WIN32 )
-    # Create .def file containing a list of exports preceeded by
-    # 'EXPORTS'.  The file "lto.exports" already contains the list, so we
-    # massage it into the correct format here to create "lto.exports.def".
-    set(LTO_EXPORTS_DEF ${CMAKE_CURRENT_BINARY_DIR}/lto.exports.def)
-    set(LTO_EXPORTS_DEF_TEMP ${LTO_EXPORTS_DEF}.txt)
-    file(READ "lto.exports" exports_list)
-    file(WRITE ${LTO_EXPORTS_DEF_TEMP} "LIBRARY LTO\n")
-    file(APPEND ${LTO_EXPORTS_DEF_TEMP} "EXPORTS\n")
-    file(APPEND ${LTO_EXPORTS_DEF_TEMP} ${exports_list})
-
-    # Copy the file only if it has changed.
-    execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
-      ${LTO_EXPORTS_DEF_TEMP} ${LTO_EXPORTS_DEF})
+set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_CURRENT_SOURCE_DIR}/lto.exports)
 
-    set(SHARED_LIB_SOURCES ${SOURCES} ${LTO_EXPORTS_DEF})
-  else()
-    set(SHARED_LIB_SOURCES ${SOURCES})
-  endif()
+if( NOT CYGWIN AND LLVM_ENABLE_PIC )
+  set(SHARED_LIB_SOURCES ${SOURCES})
 
   set(bsl ${BUILD_SHARED_LIBS})
   set(BUILD_SHARED_LIBS ON)