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      1 function(get_system_libs return_var)
      2   message(AUTHOR_WARNING "get_system_libs no longer needed")
      3   set(${return_var} "" PARENT_SCOPE)
      4 endfunction()
      5 
      6 
      7 function(link_system_libs target)
      8   message(AUTHOR_WARNING "link_system_libs no longer needed")
      9 endfunction()
     10 
     11 
     12 function(is_llvm_target_library library return_var)
     13   # Sets variable `return_var' to ON if `library' corresponds to a
     14   # LLVM supported target. To OFF if it doesn't.
     15   set(${return_var} OFF PARENT_SCOPE)
     16   string(TOUPPER "${library}" capitalized_lib)
     17   string(TOUPPER "${LLVM_ALL_TARGETS}" targets)
     18   foreach(t ${targets})
     19     if( capitalized_lib STREQUAL t OR
     20         capitalized_lib STREQUAL "LLVM${t}" OR
     21         capitalized_lib STREQUAL "LLVM${t}CODEGEN" OR
     22         capitalized_lib STREQUAL "LLVM${t}ASMPARSER" OR
     23         capitalized_lib STREQUAL "LLVM${t}ASMPRINTER" OR
     24         capitalized_lib STREQUAL "LLVM${t}DISASSEMBLER" OR
     25         capitalized_lib STREQUAL "LLVM${t}INFO" )
     26       set(${return_var} ON PARENT_SCOPE)
     27       break()
     28     endif()
     29   endforeach()
     30 endfunction(is_llvm_target_library)
     31 
     32 
     33 macro(llvm_config executable)
     34   explicit_llvm_config(${executable} ${ARGN})
     35 endmacro(llvm_config)
     36 
     37 
     38 function(explicit_llvm_config executable)
     39   set( link_components ${ARGN} )
     40 
     41   llvm_map_components_to_libnames(LIBRARIES ${link_components})
     42   get_target_property(t ${executable} TYPE)
     43   if("${t}" STREQUAL "STATIC_LIBRARY")
     44     target_link_libraries(${executable} ${cmake_2_8_12_INTERFACE} ${LIBRARIES})
     45   elseif("${t}" STREQUAL "SHARED_LIBRARY" OR "${t}" STREQUAL "MODULE_LIBRARY")
     46     target_link_libraries(${executable} ${cmake_2_8_12_PRIVATE} ${LIBRARIES})
     47   else()
     48     # Use plain form for legacy user.
     49     target_link_libraries(${executable} ${LIBRARIES})
     50   endif()
     51 endfunction(explicit_llvm_config)
     52 
     53 
     54 # This is a variant intended for the final user:
     55 function(llvm_map_components_to_libraries OUT_VAR)
     56   explicit_map_components_to_libraries(result ${ARGN})
     57   set( ${OUT_VAR} ${result} ${sys_result} PARENT_SCOPE )
     58 endfunction(llvm_map_components_to_libraries)
     59 
     60 # Map LINK_COMPONENTS to actual libnames.
     61 function(llvm_map_components_to_libnames out_libs)
     62   set( link_components ${ARGN} )
     63   if(NOT LLVM_AVAILABLE_LIBS)
     64     # Inside LLVM itself available libs are in a global property.
     65     get_property(LLVM_AVAILABLE_LIBS GLOBAL PROPERTY LLVM_LIBS)
     66   endif()
     67   string(TOUPPER "${LLVM_AVAILABLE_LIBS}" capitalized_libs)
     68 
     69   # Expand some keywords:
     70   list(FIND LLVM_TARGETS_TO_BUILD "${LLVM_NATIVE_ARCH}" have_native_backend)
     71   list(FIND link_components "engine" engine_required)
     72   if( NOT engine_required EQUAL -1 )
     73     list(FIND LLVM_TARGETS_WITH_JIT "${LLVM_NATIVE_ARCH}" have_jit)
     74     if( NOT have_native_backend EQUAL -1 AND NOT have_jit EQUAL -1 )
     75       list(APPEND link_components "jit")
     76       list(APPEND link_components "native")
     77     else()
     78       list(APPEND link_components "interpreter")
     79     endif()
     80   endif()
     81   list(FIND link_components "native" native_required)
     82   if( NOT native_required EQUAL -1 )
     83     if( NOT have_native_backend EQUAL -1 )
     84       list(APPEND link_components ${LLVM_NATIVE_ARCH})
     85     endif()
     86   endif()
     87 
     88   # Translate symbolic component names to real libraries:
     89   foreach(c ${link_components})
     90     # add codegen, asmprinter, asmparser, disassembler
     91     list(FIND LLVM_TARGETS_TO_BUILD ${c} idx)
     92     if( NOT idx LESS 0 )
     93       if( TARGET LLVM${c}CodeGen )
     94         list(APPEND expanded_components "LLVM${c}CodeGen")
     95       else()
     96         if( TARGET LLVM${c} )
     97           list(APPEND expanded_components "LLVM${c}")
     98         else()
     99           message(FATAL_ERROR "Target ${c} is not in the set of libraries.")
    100         endif()
    101       endif()
    102       if( TARGET LLVM${c}AsmPrinter )
    103         list(APPEND expanded_components "LLVM${c}AsmPrinter")
    104       endif()
    105       if( TARGET LLVM${c}AsmParser )
    106         list(APPEND expanded_components "LLVM${c}AsmParser")
    107       endif()
    108       if( TARGET LLVM${c}Info )
    109         list(APPEND expanded_components "LLVM${c}Info")
    110       endif()
    111       if( TARGET LLVM${c}Disassembler )
    112         list(APPEND expanded_components "LLVM${c}Disassembler")
    113       endif()
    114     elseif( c STREQUAL "native" )
    115       # already processed
    116     elseif( c STREQUAL "nativecodegen" )
    117       list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}CodeGen")
    118     elseif( c STREQUAL "backend" )
    119       # same case as in `native'.
    120     elseif( c STREQUAL "engine" )
    121       # already processed
    122     elseif( c STREQUAL "all" )
    123       list(APPEND expanded_components ${LLVM_AVAILABLE_LIBS})
    124     else( NOT idx LESS 0 )
    125       # Canonize the component name:
    126       string(TOUPPER "${c}" capitalized)
    127       list(FIND capitalized_libs LLVM${capitalized} lib_idx)
    128       if( lib_idx LESS 0 )
    129         # The component is unknown. Maybe is an omitted target?
    130         is_llvm_target_library(${c} iltl_result)
    131         if( NOT iltl_result )
    132           message(FATAL_ERROR "Library `${c}' not found in list of llvm libraries.")
    133         endif()
    134       else( lib_idx LESS 0 )
    135         list(GET LLVM_AVAILABLE_LIBS ${lib_idx} canonical_lib)
    136         list(APPEND expanded_components ${canonical_lib})
    137       endif( lib_idx LESS 0 )
    138     endif( NOT idx LESS 0 )
    139   endforeach(c)
    140 
    141   set(${out_libs} ${expanded_components} PARENT_SCOPE)
    142 endfunction()
    143 
    144 # Expand dependencies while topologically sorting the list of libraries:
    145 function(llvm_expand_dependencies out_libs)
    146   set(expanded_components ${ARGN})
    147   list(LENGTH expanded_components lst_size)
    148   set(cursor 0)
    149   set(processed)
    150   while( cursor LESS lst_size )
    151     list(GET expanded_components ${cursor} lib)
    152     get_property(lib_deps GLOBAL PROPERTY LLVMBUILD_LIB_DEPS_${lib})
    153     list(APPEND expanded_components ${lib_deps})
    154     # Remove duplicates at the front:
    155     list(REVERSE expanded_components)
    156     list(REMOVE_DUPLICATES expanded_components)
    157     list(REVERSE expanded_components)
    158     list(APPEND processed ${lib})
    159     # Find the maximum index that doesn't have to be re-processed:
    160     while(NOT "${expanded_components}" MATCHES "^${processed}.*" )
    161       list(REMOVE_AT processed -1)
    162     endwhile()
    163     list(LENGTH processed cursor)
    164     list(LENGTH expanded_components lst_size)
    165   endwhile( cursor LESS lst_size )
    166   set(${out_libs} ${expanded_components} PARENT_SCOPE)
    167 endfunction()
    168 
    169 function(explicit_map_components_to_libraries out_libs)
    170   llvm_map_components_to_libnames(link_libs ${ARGN})
    171   llvm_expand_dependencies(expanded_components ${link_libs})
    172   # Return just the libraries included in this build:
    173   set(result)
    174   foreach(c ${expanded_components})
    175     if( TARGET ${c} )
    176       set(result ${result} ${c})
    177     endif()
    178   endforeach(c)
    179   set(${out_libs} ${result} PARENT_SCOPE)
    180 endfunction(explicit_map_components_to_libraries)
    181