[llvm] r220490 - Adding llvm-shlib to CMake build system with a few new bells and whistles
Chris Bieneman
beanz at apple.com
Thu Oct 23 10:22:15 PDT 2014
Author: cbieneman
Date: Thu Oct 23 12:22:14 2014
New Revision: 220490
URL: http://llvm.org/viewvc/llvm-project?rev=220490&view=rev
Log:
Adding llvm-shlib to CMake build system with a few new bells and whistles
Summary:
This patch adds a new CMake build setting LLVM_BUILD_LLVM_DYLIB, which defaults to OFF. When set to ON, this will generate a shared library containing most of LLVM. The contents of the shared library can be overriden by specifying LLVM_DYLIB_COMPONENTS. LLVM_DYLIB_COMPONENTS can be set to a semi-colon delimited list of any LLVM components that you llvm-config can resolve.
On Windows, unless you are using Cygwin, you must specify an explicit symbol export file using LLVM_EXPORTED_SYMBOL_FILE. On Cygwin and all unix-like platforms if you do not specify LLVM_EXPORTED_SYMBOL_FILE, an export file containing only the LLVM C API will be auto-generated from the list of LLVM components specified in LLVM_DYLIB_COMPONENTS.
Reviewers: rnk
Reviewed By: rnk
Subscribers: rnk, llvm-commits
Differential Revision: http://reviews.llvm.org/D5890
Added:
llvm/trunk/tools/llvm-shlib/CMakeLists.txt
llvm/trunk/tools/llvm-shlib/libllvm.cpp
Modified:
llvm/trunk/CMakeLists.txt
llvm/trunk/tools/CMakeLists.txt
Modified: llvm/trunk/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/CMakeLists.txt?rev=220490&r1=220489&r2=220490&view=diff
==============================================================================
--- llvm/trunk/CMakeLists.txt (original)
+++ llvm/trunk/CMakeLists.txt Thu Oct 23 12:22:14 2014
@@ -302,6 +302,8 @@ option (LLVM_ENABLE_SPHINX "Use Sphinx t
option (LLVM_BUILD_EXTERNAL_COMPILER_RT
"Build compiler-rt as an external project." OFF)
+option(LLVM_BUILD_LLVM_DYLIB "Build libllvm dynamic library" OFF)
+
# All options referred to from HandleLLVMOptions have to be specified
# BEFORE this include, otherwise options will not be correctly set on
# first cmake run
Modified: llvm/trunk/tools/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/CMakeLists.txt?rev=220490&r1=220489&r2=220490&view=diff
==============================================================================
--- llvm/trunk/tools/CMakeLists.txt (original)
+++ llvm/trunk/tools/CMakeLists.txt Thu Oct 23 12:22:14 2014
@@ -74,6 +74,12 @@ else()
ignore_llvm_tool_subdirectory(gold)
endif()
+if( LLVM_BUILD_LLVM_DYLIB )
+ add_llvm_tool_subdirectory(llvm-shlib)
+else()
+ ignore_llvm_tool_subdirectory(llvm-shlib)
+endif()
+
add_llvm_external_project(clang)
if( NOT LLVM_INCLUDE_TOOLS STREQUAL "bootstrap-only" )
Added: llvm/trunk/tools/llvm-shlib/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-shlib/CMakeLists.txt?rev=220490&view=auto
==============================================================================
--- llvm/trunk/tools/llvm-shlib/CMakeLists.txt (added)
+++ llvm/trunk/tools/llvm-shlib/CMakeLists.txt Thu Oct 23 12:22:14 2014
@@ -0,0 +1,95 @@
+# This tool creates a shared library from the LLVM libraries. Generating this
+# library is enabled by setting LLVM_BUILD_LLVM_DYLIB=yes on the CMake
+# commandline. By default the shared library only exports the LLVM C API.
+
+
+# You can configure which libraries from LLVM you want to include in the shared
+# library by setting LLVM_DYLIB_COMPONENTS to a semi-colon delimited list of
+# LLVM components. All compoenent names handled by llvm-config are valid.
+
+if(NOT DEFINED LLVM_DYLIB_COMPONENTS)
+ set(LLVM_LINK_COMPONENTS
+ ${LLVM_TARGETS_TO_BUILD}
+ Analysis
+ AsmPrinter
+ BitWriter
+ CodeGen
+ Core
+ ExecutionEngine
+ IPA
+ IPO
+ IRReader
+ InstCombine
+ Instrumentation
+ Interpreter
+ Linker
+ MC
+ MCJIT
+ ObjCARCOpts
+ Object
+ ScalarOpts
+ SelectionDAG
+ Support
+ Target
+ TransformUtils
+ Vectorize
+ native
+ )
+else()
+ set(LLVM_LINK_COMPONENTS ${LLVM_DYLIB_COMPONENTS})
+endif()
+
+add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
+
+set(SOURCES
+ libllvm.cpp
+ )
+
+if(NOT DEFINED LLVM_EXPORTED_SYMBOL_FILE)
+
+ if( WIN32 AND NOT CYGWIN )
+ message(FATAL_ERROR "Auto-generation not implemented for Win32 without GNU utils. Please specify LLVM_EXPORTED_SYMBOL_FILE.")
+ endif()
+
+ # To get the export list for a single llvm library:
+ # nm ${LIB_PATH} | awk "/T _LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_PATH}.exports
+
+ set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm.exports)
+
+ llvm_map_components_to_libnames(LIB_NAMES ${LLVM_LINK_COMPONENTS})
+
+ foreach (lib ${LIB_NAMES})
+
+ set(LIB_DIR ${CMAKE_BINARY_DIR}/${CMAKE_CFG_INTDIR}/lib)
+ set(LIB_NAME ${LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}${lib})
+ set(LIB_PATH ${LIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX})
+ set(LIB_EXPORTS_PATH ${LIB_NAME}.exports)
+
+ list(APPEND LLVM_DYLIB_REQUIRED_EXPORTS ${LIB_EXPORTS_PATH})
+
+ add_custom_command(OUTPUT ${LIB_EXPORTS_PATH}
+ COMMAND nm ${LIB_PATH} | awk "/T _LLVM/ || /T LLVM/ { print $3 }" | sort -u | sed -e "s/^_//g" > ${LIB_EXPORTS_PATH}
+ WORKING_DIRECTORY ${LIB_DIR}
+ DEPENDS ${lib}
+ COMMENT "Generating Export list for ${lib}..."
+ VERBATIM )
+ endforeach ()
+
+ add_custom_command(OUTPUT ${LLVM_EXPORTED_SYMBOL_FILE}
+ COMMAND cat ${LLVM_DYLIB_REQUIRED_EXPORTS} > ${LLVM_EXPORTED_SYMBOL_FILE}
+ WORKING_DIRECTORY ${LIB_DIR}
+ DEPENDS ${LLVM_DYLIB_REQUIRED_EXPORTS}
+ COMMENT "Generating combined export list...")
+
+endif()
+
+add_llvm_library(LLVM SHARED ${SOURCES})
+
+add_dependencies(LLVM ${LLVM_EXPORTED_SYMBOL_FILE})
+
+if (APPLE)
+ set_property(TARGET LLVM APPEND_STRING PROPERTY
+ LINK_FLAGS
+ " -compatibility_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR} -current_version ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}")
+endif()
+
Added: llvm/trunk/tools/llvm-shlib/libllvm.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-shlib/libllvm.cpp?rev=220490&view=auto
==============================================================================
--- llvm/trunk/tools/llvm-shlib/libllvm.cpp (added)
+++ llvm/trunk/tools/llvm-shlib/libllvm.cpp Thu Oct 23 12:22:14 2014
@@ -0,0 +1,13 @@
+//===-libllvm.cpp - LLVM Shared Library -----------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is empty and serves only the purpose of making CMake happy because
+// you can't define a target with no sources.
+//
+//===----------------------------------------------------------------------===//
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