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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  explicit_llvm_config(${executable} ${ARGN})
35endmacro(llvm_config)
36
37
38function(explicit_llvm_config executable)
39  set( link_components ${ARGN} )
40
41  llvm_map_components_to_libnames(LIBRARIES ${link_components})
42  get_target_property(t ${executable} TYPE)
43  if("x${t}" STREQUAL "xSTATIC_LIBRARY")
44    target_link_libraries(${executable} INTERFACE ${LIBRARIES})
45  elseif("x${t}" STREQUAL "xSHARED_LIBRARY" OR "x${t}" STREQUAL "xMODULE_LIBRARY")
46    target_link_libraries(${executable} PRIVATE ${LIBRARIES})
47  else()
48    # Use plain form for legacy user.
49    target_link_libraries(${executable} ${LIBRARIES})
50  endif()
51endfunction(explicit_llvm_config)
52
53
54# This is Deprecated
55function(llvm_map_components_to_libraries OUT_VAR)
56  message(AUTHOR_WARNING "Using llvm_map_components_to_libraries() is deprecated. Use llvm_map_components_to_libnames() instead")
57  explicit_map_components_to_libraries(result ${ARGN})
58  set( ${OUT_VAR} ${result} ${sys_result} PARENT_SCOPE )
59endfunction(llvm_map_components_to_libraries)
60
61# This is a variant intended for the final user:
62# Map LINK_COMPONENTS to actual libnames.
63function(llvm_map_components_to_libnames out_libs)
64  set( link_components ${ARGN} )
65  if(NOT LLVM_AVAILABLE_LIBS)
66    # Inside LLVM itself available libs are in a global property.
67    get_property(LLVM_AVAILABLE_LIBS GLOBAL PROPERTY LLVM_LIBS)
68  endif()
69  string(TOUPPER "${LLVM_AVAILABLE_LIBS}" capitalized_libs)
70
71  # Expand some keywords:
72  list(FIND LLVM_TARGETS_TO_BUILD "${LLVM_NATIVE_ARCH}" have_native_backend)
73  list(FIND link_components "engine" engine_required)
74  if( NOT engine_required EQUAL -1 )
75    list(FIND LLVM_TARGETS_WITH_JIT "${LLVM_NATIVE_ARCH}" have_jit)
76    if( NOT have_native_backend EQUAL -1 AND NOT have_jit EQUAL -1 )
77      list(APPEND link_components "jit")
78      list(APPEND link_components "native")
79    else()
80      list(APPEND link_components "interpreter")
81    endif()
82  endif()
83  list(FIND link_components "native" native_required)
84  if( NOT native_required EQUAL -1 )
85    if( NOT have_native_backend EQUAL -1 )
86      list(APPEND link_components ${LLVM_NATIVE_ARCH})
87    endif()
88  endif()
89
90  # Translate symbolic component names to real libraries:
91  foreach(c ${link_components})
92    # add codegen, asmprinter, asmparser, disassembler
93    list(FIND LLVM_TARGETS_TO_BUILD ${c} idx)
94    if( NOT idx LESS 0 )
95      if( TARGET LLVM${c}CodeGen )
96        list(APPEND expanded_components "LLVM${c}CodeGen")
97      else()
98        if( TARGET LLVM${c} )
99          list(APPEND expanded_components "LLVM${c}")
100        else()
101          message(FATAL_ERROR "Target ${c} is not in the set of libraries.")
102        endif()
103      endif()
104      if( TARGET LLVM${c}AsmPrinter )
105        list(APPEND expanded_components "LLVM${c}AsmPrinter")
106      endif()
107      if( TARGET LLVM${c}AsmParser )
108        list(APPEND expanded_components "LLVM${c}AsmParser")
109      endif()
110      if( TARGET LLVM${c}Desc )
111        list(APPEND expanded_components "LLVM${c}Desc")
112      endif()
113      if( TARGET LLVM${c}Info )
114        list(APPEND expanded_components "LLVM${c}Info")
115      endif()
116      if( TARGET LLVM${c}Disassembler )
117        list(APPEND expanded_components "LLVM${c}Disassembler")
118      endif()
119    elseif( c STREQUAL "native" )
120      # already processed
121    elseif( c STREQUAL "nativecodegen" )
122      list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}CodeGen")
123      if( TARGET LLVM${LLVM_NATIVE_ARCH}Desc )
124        list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}Desc")
125      endif()
126      if( TARGET LLVM${LLVM_NATIVE_ARCH}Info )
127        list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}Info")
128      endif()
129    elseif( c STREQUAL "backend" )
130      # same case as in `native'.
131    elseif( c STREQUAL "engine" )
132      # already processed
133    elseif( c STREQUAL "all" )
134      list(APPEND expanded_components ${LLVM_AVAILABLE_LIBS})
135    else( NOT idx LESS 0 )
136      # Canonize the component name:
137      string(TOUPPER "${c}" capitalized)
138      list(FIND capitalized_libs LLVM${capitalized} lib_idx)
139      if( lib_idx LESS 0 )
140        # The component is unknown. Maybe is an omitted target?
141        is_llvm_target_library(${c} iltl_result)
142        if( NOT iltl_result )
143          message(FATAL_ERROR "Library `${c}' not found in list of llvm libraries.")
144        endif()
145      else( lib_idx LESS 0 )
146        list(GET LLVM_AVAILABLE_LIBS ${lib_idx} canonical_lib)
147        list(APPEND expanded_components ${canonical_lib})
148      endif( lib_idx LESS 0 )
149    endif( NOT idx LESS 0 )
150  endforeach(c)
151
152  set(${out_libs} ${expanded_components} PARENT_SCOPE)
153endfunction()
154
155# Perform a post-order traversal of the dependency graph.
156# This duplicates the algorithm used by llvm-config, originally
157# in tools/llvm-config/llvm-config.cpp, function ComputeLibsForComponents.
158function(expand_topologically name required_libs visited_libs)
159  list(FIND visited_libs ${name} found)
160  if( found LESS 0 )
161    list(APPEND visited_libs ${name})
162    set(visited_libs ${visited_libs} PARENT_SCOPE)
163
164    get_property(lib_deps GLOBAL PROPERTY LLVMBUILD_LIB_DEPS_${name})
165    foreach( lib_dep ${lib_deps} )
166      expand_topologically(${lib_dep} "${required_libs}" "${visited_libs}")
167      set(required_libs ${required_libs} PARENT_SCOPE)
168      set(visited_libs ${visited_libs} PARENT_SCOPE)
169    endforeach()
170
171    list(APPEND required_libs ${name})
172    set(required_libs ${required_libs} PARENT_SCOPE)
173  endif()
174endfunction()
175
176# Expand dependencies while topologically sorting the list of libraries:
177function(llvm_expand_dependencies out_libs)
178  set(expanded_components ${ARGN})
179
180  set(required_libs)
181  set(visited_libs)
182  foreach( lib ${expanded_components} )
183    expand_topologically(${lib} "${required_libs}" "${visited_libs}")
184  endforeach()
185
186  list(REVERSE required_libs)
187  set(${out_libs} ${required_libs} PARENT_SCOPE)
188endfunction()
189
190function(explicit_map_components_to_libraries out_libs)
191  llvm_map_components_to_libnames(link_libs ${ARGN})
192  llvm_expand_dependencies(expanded_components ${link_libs})
193  # Return just the libraries included in this build:
194  set(result)
195  foreach(c ${expanded_components})
196    if( TARGET ${c} )
197      set(result ${result} ${c})
198    endif()
199  endforeach(c)
200  set(${out_libs} ${result} PARENT_SCOPE)
201endfunction(explicit_map_components_to_libraries)
202