1function(get_system_libs return_var)
2  message(AUTHOR_WARNING "get_system_libs no longer needed")
3  set(${return_var} "" PARENT_SCOPE)
4endfunction()
5
6
7function(link_system_libs target)
8  message(AUTHOR_WARNING "link_system_libs no longer needed")
9endfunction()
10
11
12function(is_llvm_target_library library return_var)
13  # Sets variable `return_var' to ON if `library' corresponds to a
14  # LLVM supported target. To OFF if it doesn't.
15  set(${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()
30endfunction(is_llvm_target_library)
31
32
33macro(llvm_config executable)
34  cmake_parse_arguments(ARG "USE_SHARED" "" "" ${ARGN})
35  set(link_components ${ARG_UNPARSED_ARGUMENTS})
36
37  if(USE_SHARED)
38    # If USE_SHARED is specified, then we link against libLLVM,
39    # but also against the component libraries below. This is
40    # done in case libLLVM does not contain all of the components
41    # the target requires.
42    #
43    # TODO strip LLVM_DYLIB_COMPONENTS out of link_components.
44    # To do this, we need special handling for "all", since that
45    # may imply linking to libraries that are not included in
46    # libLLVM.
47    target_link_libraries(${executable} LLVM)
48  endif()
49
50  explicit_llvm_config(${executable} ${link_components})
51endmacro(llvm_config)
52
53
54function(explicit_llvm_config executable)
55  set( link_components ${ARGN} )
56
57  llvm_map_components_to_libnames(LIBRARIES ${link_components})
58  get_target_property(t ${executable} TYPE)
59  if("x${t}" STREQUAL "xSTATIC_LIBRARY")
60    target_link_libraries(${executable} INTERFACE ${LIBRARIES})
61  elseif("x${t}" STREQUAL "xSHARED_LIBRARY" OR "x${t}" STREQUAL "xMODULE_LIBRARY")
62    target_link_libraries(${executable} PRIVATE ${LIBRARIES})
63  else()
64    # Use plain form for legacy user.
65    target_link_libraries(${executable} ${LIBRARIES})
66  endif()
67endfunction(explicit_llvm_config)
68
69
70# This is Deprecated
71function(llvm_map_components_to_libraries OUT_VAR)
72  message(AUTHOR_WARNING "Using llvm_map_components_to_libraries() is deprecated. Use llvm_map_components_to_libnames() instead")
73  explicit_map_components_to_libraries(result ${ARGN})
74  set( ${OUT_VAR} ${result} ${sys_result} PARENT_SCOPE )
75endfunction(llvm_map_components_to_libraries)
76
77# This is a variant intended for the final user:
78# Map LINK_COMPONENTS to actual libnames.
79function(llvm_map_components_to_libnames out_libs)
80  set( link_components ${ARGN} )
81  if(NOT LLVM_AVAILABLE_LIBS)
82    # Inside LLVM itself available libs are in a global property.
83    get_property(LLVM_AVAILABLE_LIBS GLOBAL PROPERTY LLVM_LIBS)
84  endif()
85  string(TOUPPER "${LLVM_AVAILABLE_LIBS}" capitalized_libs)
86
87  # Expand some keywords:
88  list(FIND LLVM_TARGETS_TO_BUILD "${LLVM_NATIVE_ARCH}" have_native_backend)
89  list(FIND link_components "engine" engine_required)
90  if( NOT engine_required EQUAL -1 )
91    list(FIND LLVM_TARGETS_WITH_JIT "${LLVM_NATIVE_ARCH}" have_jit)
92    if( NOT have_native_backend EQUAL -1 AND NOT have_jit EQUAL -1 )
93      list(APPEND link_components "jit")
94      list(APPEND link_components "native")
95    else()
96      list(APPEND link_components "interpreter")
97    endif()
98  endif()
99  list(FIND link_components "native" native_required)
100  if( NOT native_required EQUAL -1 )
101    if( NOT have_native_backend EQUAL -1 )
102      list(APPEND link_components ${LLVM_NATIVE_ARCH})
103    endif()
104  endif()
105
106  # Translate symbolic component names to real libraries:
107  foreach(c ${link_components})
108    # add codegen, asmprinter, asmparser, disassembler
109    list(FIND LLVM_TARGETS_TO_BUILD ${c} idx)
110    if( NOT idx LESS 0 )
111      if( TARGET LLVM${c}CodeGen )
112        list(APPEND expanded_components "LLVM${c}CodeGen")
113      else()
114        if( TARGET LLVM${c} )
115          list(APPEND expanded_components "LLVM${c}")
116        else()
117          message(FATAL_ERROR "Target ${c} is not in the set of libraries.")
118        endif()
119      endif()
120      if( TARGET LLVM${c}AsmPrinter )
121        list(APPEND expanded_components "LLVM${c}AsmPrinter")
122      endif()
123      if( TARGET LLVM${c}AsmParser )
124        list(APPEND expanded_components "LLVM${c}AsmParser")
125      endif()
126      if( TARGET LLVM${c}Desc )
127        list(APPEND expanded_components "LLVM${c}Desc")
128      endif()
129      if( TARGET LLVM${c}Info )
130        list(APPEND expanded_components "LLVM${c}Info")
131      endif()
132      if( TARGET LLVM${c}Disassembler )
133        list(APPEND expanded_components "LLVM${c}Disassembler")
134      endif()
135    elseif( c STREQUAL "native" )
136      # already processed
137    elseif( c STREQUAL "nativecodegen" )
138      list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}CodeGen")
139      if( TARGET LLVM${LLVM_NATIVE_ARCH}Desc )
140        list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}Desc")
141      endif()
142      if( TARGET LLVM${LLVM_NATIVE_ARCH}Info )
143        list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}Info")
144      endif()
145    elseif( c STREQUAL "backend" )
146      # same case as in `native'.
147    elseif( c STREQUAL "engine" )
148      # already processed
149    elseif( c STREQUAL "all" )
150      list(APPEND expanded_components ${LLVM_AVAILABLE_LIBS})
151    elseif( c STREQUAL "AllTargetsAsmPrinters" )
152      # Link all the asm printers from all the targets
153      foreach(t ${LLVM_TARGETS_TO_BUILD})
154        if( TARGET LLVM${t}AsmPrinter )
155          list(APPEND expanded_components "LLVM${t}AsmPrinter")
156        endif()
157      endforeach(t)
158    elseif( c STREQUAL "AllTargetsAsmParsers" )
159      # Link all the asm parsers from all the targets
160      foreach(t ${LLVM_TARGETS_TO_BUILD})
161        if( TARGET LLVM${t}AsmParser )
162          list(APPEND expanded_components "LLVM${t}AsmParser")
163        endif()
164      endforeach(t)
165    elseif( c STREQUAL "AllTargetsDescs" )
166      # Link all the descs from all the targets
167      foreach(t ${LLVM_TARGETS_TO_BUILD})
168        if( TARGET LLVM${t}Desc )
169          list(APPEND expanded_components "LLVM${t}Desc")
170        endif()
171      endforeach(t)
172    elseif( c STREQUAL "AllTargetsDisassemblers" )
173      # Link all the disassemblers from all the targets
174      foreach(t ${LLVM_TARGETS_TO_BUILD})
175        if( TARGET LLVM${t}Disassembler )
176          list(APPEND expanded_components "LLVM${t}Disassembler")
177        endif()
178      endforeach(t)
179    elseif( c STREQUAL "AllTargetsInfos" )
180      # Link all the infos from all the targets
181      foreach(t ${LLVM_TARGETS_TO_BUILD})
182        if( TARGET LLVM${t}Info )
183          list(APPEND expanded_components "LLVM${t}Info")
184        endif()
185      endforeach(t)
186    else( NOT idx LESS 0 )
187      # Canonize the component name:
188      string(TOUPPER "${c}" capitalized)
189      list(FIND capitalized_libs LLVM${capitalized} lib_idx)
190      if( lib_idx LESS 0 )
191        # The component is unknown. Maybe is an omitted target?
192        is_llvm_target_library(${c} iltl_result)
193        if( NOT iltl_result )
194          message(FATAL_ERROR "Library `${c}' not found in list of llvm libraries.")
195        endif()
196      else( lib_idx LESS 0 )
197        list(GET LLVM_AVAILABLE_LIBS ${lib_idx} canonical_lib)
198        list(APPEND expanded_components ${canonical_lib})
199      endif( lib_idx LESS 0 )
200    endif( NOT idx LESS 0 )
201  endforeach(c)
202
203  set(${out_libs} ${expanded_components} PARENT_SCOPE)
204endfunction()
205
206# Perform a post-order traversal of the dependency graph.
207# This duplicates the algorithm used by llvm-config, originally
208# in tools/llvm-config/llvm-config.cpp, function ComputeLibsForComponents.
209function(expand_topologically name required_libs visited_libs)
210  list(FIND visited_libs ${name} found)
211  if( found LESS 0 )
212    list(APPEND visited_libs ${name})
213    set(visited_libs ${visited_libs} PARENT_SCOPE)
214
215    get_property(lib_deps GLOBAL PROPERTY LLVMBUILD_LIB_DEPS_${name})
216    foreach( lib_dep ${lib_deps} )
217      expand_topologically(${lib_dep} "${required_libs}" "${visited_libs}")
218      set(required_libs ${required_libs} PARENT_SCOPE)
219      set(visited_libs ${visited_libs} PARENT_SCOPE)
220    endforeach()
221
222    list(APPEND required_libs ${name})
223    set(required_libs ${required_libs} PARENT_SCOPE)
224  endif()
225endfunction()
226
227# Expand dependencies while topologically sorting the list of libraries:
228function(llvm_expand_dependencies out_libs)
229  set(expanded_components ${ARGN})
230
231  set(required_libs)
232  set(visited_libs)
233  foreach( lib ${expanded_components} )
234    expand_topologically(${lib} "${required_libs}" "${visited_libs}")
235  endforeach()
236
237  list(REVERSE required_libs)
238  set(${out_libs} ${required_libs} PARENT_SCOPE)
239endfunction()
240
241function(explicit_map_components_to_libraries out_libs)
242  llvm_map_components_to_libnames(link_libs ${ARGN})
243  llvm_expand_dependencies(expanded_components ${link_libs})
244  # Return just the libraries included in this build:
245  set(result)
246  foreach(c ${expanded_components})
247    if( TARGET ${c} )
248      set(result ${result} ${c})
249    endif()
250  endforeach(c)
251  set(${out_libs} ${result} PARENT_SCOPE)
252endfunction(explicit_map_components_to_libraries)
253