function(get_system_libs return_var)
# Returns in `return_var' a list of system libraries used by LLVM.
if( NOT MSVC )
if( MINGW )
set(system_libs ${system_libs} imagehlp psapi)
elseif( CMAKE_HOST_UNIX )
if( HAVE_LIBDL )
set(system_libs ${system_libs} ${CMAKE_DL_LIBS})
endif()
if( LLVM_ENABLE_THREADS AND HAVE_LIBPTHREAD )
set(system_libs ${system_libs} pthread)
endif()
endif( MINGW )
endif( NOT MSVC )
set(${return_var} ${system_libs} PARENT_SCOPE)
endfunction(get_system_libs)
function(link_system_libs target)
get_system_libs(llvm_system_libs)
target_link_libraries(${target} ${llvm_system_libs})
endfunction(link_system_libs)
function(is_llvm_target_library library return_var)
# Sets variable `return_var' to ON if `library' corresponds to a
# LLVM supported target. To OFF if it doesn't.
set(${return_var} OFF PARENT_SCOPE)
string(TOUPPER "${library}" capitalized_lib)
string(TOUPPER "${LLVM_ALL_TARGETS}" targets)
foreach(t ${targets})
if( capitalized_lib STREQUAL t OR
capitalized_lib STREQUAL "LLVM${t}" OR
capitalized_lib STREQUAL "LLVM${t}CODEGEN" OR
capitalized_lib STREQUAL "LLVM${t}ASMPARSER" OR
capitalized_lib STREQUAL "LLVM${t}ASMPRINTER" OR
capitalized_lib STREQUAL "LLVM${t}DISASSEMBLER" OR
capitalized_lib STREQUAL "LLVM${t}INFO" )
set(${return_var} ON PARENT_SCOPE)
break()
endif()
endforeach()
endfunction(is_llvm_target_library)
macro(llvm_config executable)
explicit_llvm_config(${executable} ${ARGN})
endmacro(llvm_config)
function(explicit_llvm_config executable)
set( link_components ${ARGN} )
explicit_map_components_to_libraries(LIBRARIES ${link_components})
target_link_libraries(${executable} ${LIBRARIES})
endfunction(explicit_llvm_config)
# This is a variant intended for the final user:
function(llvm_map_components_to_libraries OUT_VAR)
explicit_map_components_to_libraries(result ${ARGN})
get_system_libs(sys_result)
set( ${OUT_VAR} ${result} ${sys_result} PARENT_SCOPE )
endfunction(llvm_map_components_to_libraries)
function(explicit_map_components_to_libraries out_libs)
set( link_components ${ARGN} )
get_property(llvm_libs GLOBAL PROPERTY LLVM_LIBS)
string(TOUPPER "${llvm_libs}" capitalized_libs)
# Expand some keywords:
list(FIND LLVM_TARGETS_TO_BUILD "${LLVM_NATIVE_ARCH}" have_native_backend)
list(FIND link_components "engine" engine_required)
if( NOT engine_required EQUAL -1 )
list(FIND LLVM_TARGETS_WITH_JIT "${LLVM_NATIVE_ARCH}" have_jit)
if( NOT have_native_backend EQUAL -1 AND NOT have_jit EQUAL -1 )
list(APPEND link_components "jit")
list(APPEND link_components "native")
else()
list(APPEND link_components "interpreter")
endif()
endif()
list(FIND link_components "native" native_required)
if( NOT native_required EQUAL -1 )
if( NOT have_native_backend EQUAL -1 )
list(APPEND link_components ${LLVM_NATIVE_ARCH})
endif()
endif()
# Translate symbolic component names to real libraries:
foreach(c ${link_components})
# add codegen, asmprinter, asmparser, disassembler
list(FIND LLVM_TARGETS_TO_BUILD ${c} idx)
if( NOT idx LESS 0 )
list(FIND llvm_libs "LLVM${c}CodeGen" idx)
if( NOT idx LESS 0 )
list(APPEND expanded_components "LLVM${c}CodeGen")
else()
list(FIND llvm_libs "LLVM${c}" idx)
if( NOT idx LESS 0 )
list(APPEND expanded_components "LLVM${c}")
else()
message(FATAL_ERROR "Target ${c} is not in the set of libraries.")
endif()
endif()
list(FIND llvm_libs "LLVM${c}AsmPrinter" asmidx)
if( NOT asmidx LESS 0 )
list(APPEND expanded_components "LLVM${c}AsmPrinter")
endif()
list(FIND llvm_libs "LLVM${c}AsmParser" asmidx)
if( NOT asmidx LESS 0 )
list(APPEND expanded_components "LLVM${c}AsmParser")
endif()
list(FIND llvm_libs "LLVM${c}Info" asmidx)
if( NOT asmidx LESS 0 )
list(APPEND expanded_components "LLVM${c}Info")
endif()
list(FIND llvm_libs "LLVM${c}Disassembler" asmidx)
if( NOT asmidx LESS 0 )
list(APPEND expanded_components "LLVM${c}Disassembler")
endif()
elseif( c STREQUAL "native" )
# already processed
elseif( c STREQUAL "nativecodegen" )
list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}CodeGen")
elseif( c STREQUAL "backend" )
# same case as in `native'.
elseif( c STREQUAL "engine" )
# already processed
elseif( c STREQUAL "all" )
list(APPEND expanded_components ${llvm_libs})
else( NOT idx LESS 0 )
# Canonize the component name:
string(TOUPPER "${c}" capitalized)
list(FIND capitalized_libs LLVM${capitalized} lib_idx)
if( lib_idx LESS 0 )
# The component is unknown. Maybe is an omitted target?
is_llvm_target_library(${c} iltl_result)
if( NOT iltl_result )
message(FATAL_ERROR "Library `${c}' not found in list of llvm libraries.")
endif()
else( lib_idx LESS 0 )
list(GET llvm_libs ${lib_idx} canonical_lib)
list(APPEND expanded_components ${canonical_lib})
endif( lib_idx LESS 0 )
endif( NOT idx LESS 0 )
endforeach(c)
# Expand dependencies while topologically sorting the list of libraries:
list(LENGTH expanded_components lst_size)
set(cursor 0)
set(processed)
while( cursor LESS lst_size )
list(GET expanded_components ${cursor} lib)
list(APPEND expanded_components ${MSVC_LIB_DEPS_${lib}})
# Remove duplicates at the front:
list(REVERSE expanded_components)
list(REMOVE_DUPLICATES expanded_components)
list(REVERSE expanded_components)
list(APPEND processed ${lib})
# Find the maximum index that doesn't have to be re-processed:
while(NOT "${expanded_components}" MATCHES "^${processed}.*" )
list(REMOVE_AT processed -1)
endwhile()
list(LENGTH processed cursor)
list(LENGTH expanded_components lst_size)
endwhile( cursor LESS lst_size )
# Return just the libraries included in this build:
set(result)
foreach(c ${expanded_components})
list(FIND llvm_libs ${c} lib_idx)
if( NOT lib_idx LESS 0 )
set(result ${result} ${c})
endif()
endforeach(c)
set(${out_libs} ${result} PARENT_SCOPE)
endfunction(explicit_map_components_to_libraries)
# The library dependency data is contained in the file
# LLVMLibDeps.cmake on this directory. It is automatically generated
# by tools/llvm-config/CMakeLists.txt when the build comprises all the
# targets and we are on a environment Posix enough to build the
# llvm-config script. This, in practice, just excludes MSVC.
# When you remove or rename a library from the build, be sure to
# remove its file from lib/ as well, or the GenLibDeps.pl script will
# include it on its analysis!
# The format generated by GenLibDeps.pl
# LLVMARMAsmPrinter.o: LLVMARMCodeGen.o libLLVMAsmPrinter.a libLLVMCodeGen.a libLLVMCore.a libLLVMSupport.a libLLVMTarget.a
# is translated to:
# set(MSVC_LIB_DEPS_LLVMARMAsmPrinter LLVMARMCodeGen LLVMAsmPrinter LLVMCodeGen LLVMCore LLVMSupport LLVMTarget)
# It is necessary to remove the `lib' prefix and the `.a'.
# This 'sed' script should do the trick:
# sed -e s'#\.a##g' -e 's#libLLVM#LLVM#g' -e 's#: # #' -e 's#\(.*\)#set(MSVC_LIB_DEPS_\1)#' ~/llvm/tools/llvm-config/LibDeps.txt
include(LLVMLibDeps)