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# is_llvm_target_library(
12#   library
13#     Name of the LLVM library to check
14#   return_var
15#     Output variable name
16#   ALL_TARGETS;INCLUDED_TARGETS;OMITTED_TARGETS
17#     ALL_TARGETS - default looks at the full list of known targets
18#     INCLUDED_TARGETS - looks only at targets being configured
19#     OMITTED_TARGETS - looks only at targets that are not being configured
20# )
21function(is_llvm_target_library library return_var)
22  cmake_parse_arguments(ARG "ALL_TARGETS;INCLUDED_TARGETS;OMITTED_TARGETS" "" "" ${ARGN})
23  # Sets variable `return_var' to ON if `library' corresponds to a
24  # LLVM supported target. To OFF if it doesn't.
25  set(${return_var} OFF PARENT_SCOPE)
26  string(TOUPPER "${library}" capitalized_lib)
27  if(ARG_INCLUDED_TARGETS)
28    string(TOUPPER "${LLVM_TARGETS_TO_BUILD}" targets)
29  elseif(ARG_OMITTED_TARGETS)
30    set(omitted_targets ${LLVM_ALL_TARGETS})
31    list(REMOVE_ITEM omitted_targets ${LLVM_TARGETS_TO_BUILD})
32    string(TOUPPER "${omitted_targets}" targets)
33  else()
34    string(TOUPPER "${LLVM_ALL_TARGETS}" targets)
35  endif()
36  foreach(t ${targets})
37    if( capitalized_lib STREQUAL t OR
38        capitalized_lib STREQUAL "${t}" OR
39        capitalized_lib STREQUAL "${t}DESC" OR
40        capitalized_lib STREQUAL "${t}CODEGEN" OR
41        capitalized_lib STREQUAL "${t}ASMPARSER" OR
42        capitalized_lib STREQUAL "${t}ASMPRINTER" OR
43        capitalized_lib STREQUAL "${t}DISASSEMBLER" OR
44        capitalized_lib STREQUAL "${t}INFO" OR
45        capitalized_lib STREQUAL "${t}UTILS" )
46      set(${return_var} ON PARENT_SCOPE)
47      break()
48    endif()
49  endforeach()
50endfunction(is_llvm_target_library)
51
52function(is_llvm_target_specifier library return_var)
53  is_llvm_target_library(${library} ${return_var} ${ARGN})
54  string(TOUPPER "${library}" capitalized_lib)
55  if(NOT ${return_var})
56    if( capitalized_lib STREQUAL "ALLTARGETSASMPARSERS" OR
57        capitalized_lib STREQUAL "ALLTARGETSDESCS" OR
58        capitalized_lib STREQUAL "ALLTARGETSDISASSEMBLERS" OR
59        capitalized_lib STREQUAL "ALLTARGETSINFOS" OR
60        capitalized_lib STREQUAL "NATIVE" OR
61        capitalized_lib STREQUAL "NATIVECODEGEN" )
62      set(${return_var} ON PARENT_SCOPE)
63    endif()
64  endif()
65endfunction()
66
67macro(llvm_config executable)
68  cmake_parse_arguments(ARG "USE_SHARED" "" "" ${ARGN})
69  set(link_components ${ARG_UNPARSED_ARGUMENTS})
70
71  if(ARG_USE_SHARED)
72    # If USE_SHARED is specified, then we link against libLLVM,
73    # but also against the component libraries below. This is
74    # done in case libLLVM does not contain all of the components
75    # the target requires.
76    #
77    # Strip LLVM_DYLIB_COMPONENTS out of link_components.
78    # To do this, we need special handling for "all", since that
79    # may imply linking to libraries that are not included in
80    # libLLVM.
81
82    if (DEFINED link_components AND DEFINED LLVM_DYLIB_COMPONENTS)
83      if("${LLVM_DYLIB_COMPONENTS}" STREQUAL "all")
84        set(link_components "")
85      else()
86        list(REMOVE_ITEM link_components ${LLVM_DYLIB_COMPONENTS})
87      endif()
88    endif()
89
90    target_link_libraries(${executable} PRIVATE LLVM)
91  endif()
92
93  explicit_llvm_config(${executable} ${link_components})
94endmacro(llvm_config)
95
96
97function(explicit_llvm_config executable)
98  set( link_components ${ARGN} )
99
100  llvm_map_components_to_libnames(LIBRARIES ${link_components})
101  get_target_property(t ${executable} TYPE)
102  if(t STREQUAL "STATIC_LIBRARY")
103    target_link_libraries(${executable} INTERFACE ${LIBRARIES})
104  elseif(t STREQUAL "EXECUTABLE" OR t STREQUAL "SHARED_LIBRARY" OR t STREQUAL "MODULE_LIBRARY")
105    target_link_libraries(${executable} PRIVATE ${LIBRARIES})
106  else()
107    # Use plain form for legacy user.
108    target_link_libraries(${executable} ${LIBRARIES})
109  endif()
110endfunction(explicit_llvm_config)
111
112
113# This is Deprecated
114function(llvm_map_components_to_libraries OUT_VAR)
115  message(AUTHOR_WARNING "Using llvm_map_components_to_libraries() is deprecated. Use llvm_map_components_to_libnames() instead")
116  explicit_map_components_to_libraries(result ${ARGN})
117  set( ${OUT_VAR} ${result} ${sys_result} PARENT_SCOPE )
118endfunction(llvm_map_components_to_libraries)
119
120# This is a variant intended for the final user:
121# Map LINK_COMPONENTS to actual libnames.
122function(llvm_map_components_to_libnames out_libs)
123  set( link_components ${ARGN} )
124  if(NOT LLVM_AVAILABLE_LIBS)
125    # Inside LLVM itself available libs are in a global property.
126    get_property(LLVM_AVAILABLE_LIBS GLOBAL PROPERTY LLVM_LIBS)
127  endif()
128  string(TOUPPER "${LLVM_AVAILABLE_LIBS}" capitalized_libs)
129
130  get_property(LLVM_TARGETS_CONFIGURED GLOBAL PROPERTY LLVM_TARGETS_CONFIGURED)
131
132  # Generally in our build system we avoid order-dependence. Unfortunately since
133  # not all targets create the same set of libraries we actually need to ensure
134  # that all build targets associated with a target are added before we can
135  # process target dependencies.
136  if(NOT LLVM_TARGETS_CONFIGURED)
137    foreach(c ${link_components})
138      is_llvm_target_specifier(${c} iltl_result ALL_TARGETS)
139      if(iltl_result)
140        message(FATAL_ERROR "Specified target library before target registration is complete.")
141      endif()
142    endforeach()
143  endif()
144
145  # Expand some keywords:
146  list(FIND LLVM_TARGETS_TO_BUILD "${LLVM_NATIVE_ARCH}" have_native_backend)
147  list(FIND link_components "engine" engine_required)
148  if( NOT engine_required EQUAL -1 )
149    list(FIND LLVM_TARGETS_WITH_JIT "${LLVM_NATIVE_ARCH}" have_jit)
150    if( NOT have_native_backend EQUAL -1 AND NOT have_jit EQUAL -1 )
151      list(APPEND link_components "jit")
152      list(APPEND link_components "native")
153    else()
154      list(APPEND link_components "interpreter")
155    endif()
156  endif()
157  list(FIND link_components "native" native_required)
158  if( NOT native_required EQUAL -1 )
159    if( NOT have_native_backend EQUAL -1 )
160      list(APPEND link_components ${LLVM_NATIVE_ARCH})
161    endif()
162  endif()
163
164  # Translate symbolic component names to real libraries:
165  foreach(c ${link_components})
166    # add codegen, asmprinter, asmparser, disassembler
167    list(FIND LLVM_TARGETS_TO_BUILD ${c} idx)
168    if( NOT idx LESS 0 )
169      if( TARGET LLVM${c}CodeGen )
170        list(APPEND expanded_components "LLVM${c}CodeGen")
171      else()
172        if( TARGET LLVM${c} )
173          list(APPEND expanded_components "LLVM${c}")
174        else()
175          message(FATAL_ERROR "Target ${c} is not in the set of libraries.")
176        endif()
177      endif()
178      if( TARGET LLVM${c}AsmParser )
179        list(APPEND expanded_components "LLVM${c}AsmParser")
180      endif()
181      if( TARGET LLVM${c}AsmPrinter )
182        list(APPEND expanded_components "LLVM${c}AsmPrinter")
183      endif()
184      if( TARGET LLVM${c}Desc )
185        list(APPEND expanded_components "LLVM${c}Desc")
186      endif()
187      if( TARGET LLVM${c}Disassembler )
188        list(APPEND expanded_components "LLVM${c}Disassembler")
189      endif()
190      if( TARGET LLVM${c}Info )
191        list(APPEND expanded_components "LLVM${c}Info")
192      endif()
193      if( TARGET LLVM${c}Utils )
194        list(APPEND expanded_components "LLVM${c}Utils")
195      endif()
196    elseif( c STREQUAL "native" )
197      # already processed
198    elseif( c STREQUAL "nativecodegen" )
199      list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}CodeGen")
200      if( TARGET LLVM${LLVM_NATIVE_ARCH}Desc )
201        list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}Desc")
202      endif()
203      if( TARGET LLVM${LLVM_NATIVE_ARCH}Info )
204        list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}Info")
205      endif()
206    elseif( c STREQUAL "backend" )
207      # same case as in `native'.
208    elseif( c STREQUAL "engine" )
209      # already processed
210    elseif( c STREQUAL "all" )
211      list(APPEND expanded_components ${LLVM_AVAILABLE_LIBS})
212    elseif( c STREQUAL "AllTargetsAsmPrinters" )
213      # Link all the asm printers from all the targets
214      foreach(t ${LLVM_TARGETS_TO_BUILD})
215        if( TARGET LLVM${t}AsmPrinter )
216          list(APPEND expanded_components "LLVM${t}AsmPrinter")
217        endif()
218      endforeach(t)
219    elseif( c STREQUAL "AllTargetsAsmParsers" )
220      # Link all the asm parsers from all the targets
221      foreach(t ${LLVM_TARGETS_TO_BUILD})
222        if( TARGET LLVM${t}AsmParser )
223          list(APPEND expanded_components "LLVM${t}AsmParser")
224        endif()
225      endforeach(t)
226    elseif( c STREQUAL "AllTargetsDescs" )
227      # Link all the descs from all the targets
228      foreach(t ${LLVM_TARGETS_TO_BUILD})
229        if( TARGET LLVM${t}Desc )
230          list(APPEND expanded_components "LLVM${t}Desc")
231        endif()
232      endforeach(t)
233    elseif( c STREQUAL "AllTargetsDisassemblers" )
234      # Link all the disassemblers from all the targets
235      foreach(t ${LLVM_TARGETS_TO_BUILD})
236        if( TARGET LLVM${t}Disassembler )
237          list(APPEND expanded_components "LLVM${t}Disassembler")
238        endif()
239      endforeach(t)
240    elseif( c STREQUAL "AllTargetsInfos" )
241      # Link all the infos from all the targets
242      foreach(t ${LLVM_TARGETS_TO_BUILD})
243        if( TARGET LLVM${t}Info )
244          list(APPEND expanded_components "LLVM${t}Info")
245        endif()
246      endforeach(t)
247    else( NOT idx LESS 0 )
248      # Canonize the component name:
249      string(TOUPPER "${c}" capitalized)
250      list(FIND capitalized_libs LLVM${capitalized} lib_idx)
251      if( lib_idx LESS 0 )
252        # The component is unknown. Maybe is an omitted target?
253        is_llvm_target_library(${c} iltl_result OMITTED_TARGETS)
254        if(iltl_result)
255          # A missing library to a directly referenced omitted target would be bad.
256          message(FATAL_ERROR "Library '${c}' is a direct reference to a target library for an omitted target.")
257        else()
258          # If it is not an omitted target we should assume it is a component
259          # that hasn't yet been processed by CMake. Missing components will
260          # cause errors later in the configuration, so we can safely assume
261          # that this is valid here.
262          list(APPEND expanded_components LLVM${c})
263        endif()
264      else( lib_idx LESS 0 )
265        list(GET LLVM_AVAILABLE_LIBS ${lib_idx} canonical_lib)
266        list(APPEND expanded_components ${canonical_lib})
267      endif( lib_idx LESS 0 )
268    endif( NOT idx LESS 0 )
269  endforeach(c)
270
271  set(${out_libs} ${expanded_components} PARENT_SCOPE)
272endfunction()
273
274# Perform a post-order traversal of the dependency graph.
275# This duplicates the algorithm used by llvm-config, originally
276# in tools/llvm-config/llvm-config.cpp, function ComputeLibsForComponents.
277function(expand_topologically name required_libs visited_libs)
278  list(FIND visited_libs ${name} found)
279  if( found LESS 0 )
280    list(APPEND visited_libs ${name})
281    set(visited_libs ${visited_libs} PARENT_SCOPE)
282
283    get_property(lib_deps GLOBAL PROPERTY LLVMBUILD_LIB_DEPS_${name})
284    foreach( lib_dep ${lib_deps} )
285      expand_topologically(${lib_dep} "${required_libs}" "${visited_libs}")
286      set(required_libs ${required_libs} PARENT_SCOPE)
287      set(visited_libs ${visited_libs} PARENT_SCOPE)
288    endforeach()
289
290    list(APPEND required_libs ${name})
291    set(required_libs ${required_libs} PARENT_SCOPE)
292  endif()
293endfunction()
294
295# Expand dependencies while topologically sorting the list of libraries:
296function(llvm_expand_dependencies out_libs)
297  set(expanded_components ${ARGN})
298
299  set(required_libs)
300  set(visited_libs)
301  foreach( lib ${expanded_components} )
302    expand_topologically(${lib} "${required_libs}" "${visited_libs}")
303  endforeach()
304
305  list(REVERSE required_libs)
306  set(${out_libs} ${required_libs} PARENT_SCOPE)
307endfunction()
308
309function(explicit_map_components_to_libraries out_libs)
310  llvm_map_components_to_libnames(link_libs ${ARGN})
311  llvm_expand_dependencies(expanded_components ${link_libs})
312  # Return just the libraries included in this build:
313  set(result)
314  foreach(c ${expanded_components})
315    if( TARGET ${c} )
316      set(result ${result} ${c})
317    endif()
318  endforeach(c)
319  set(${out_libs} ${result} PARENT_SCOPE)
320endfunction(explicit_map_components_to_libraries)
321