1function(get_system_libs return_var)
2  # Returns in `return_var' a list of system libraries used by LLVM.
3  if( NOT MSVC )
4    if( MINGW )
5      set(system_libs ${system_libs} imagehlp psapi shell32)
6    elseif( CMAKE_HOST_UNIX )
7      if( HAVE_LIBRT )
8        set(system_libs ${system_libs} rt)
9      endif()
10      if( HAVE_LIBDL )
11        set(system_libs ${system_libs} ${CMAKE_DL_LIBS})
12      endif()
13      if(LLVM_ENABLE_TERMINFO)
14        if(HAVE_TERMINFO)
15          set(system_libs ${system_libs} ${TERMINFO_LIBS})
16        endif()
17      endif()
18      if( LLVM_ENABLE_THREADS AND HAVE_LIBPTHREAD )
19        set(system_libs ${system_libs} pthread)
20      endif()
21      if ( LLVM_ENABLE_ZLIB AND HAVE_LIBZ )
22        set(system_libs ${system_libs} z)
23      endif()
24    endif( MINGW )
25  endif( NOT MSVC )
26  set(${return_var} ${system_libs} PARENT_SCOPE)
27endfunction(get_system_libs)
28
29
30function(link_system_libs target)
31  get_system_libs(llvm_system_libs)
32  target_link_libraries(${target} ${llvm_system_libs})
33endfunction(link_system_libs)
34
35
36function(is_llvm_target_library library return_var)
37  # Sets variable `return_var' to ON if `library' corresponds to a
38  # LLVM supported target. To OFF if it doesn't.
39  set(${return_var} OFF PARENT_SCOPE)
40  string(TOUPPER "${library}" capitalized_lib)
41  string(TOUPPER "${LLVM_ALL_TARGETS}" targets)
42  foreach(t ${targets})
43    if( capitalized_lib STREQUAL t OR
44        capitalized_lib STREQUAL "LLVM${t}" OR
45        capitalized_lib STREQUAL "LLVM${t}CODEGEN" OR
46        capitalized_lib STREQUAL "LLVM${t}ASMPARSER" OR
47        capitalized_lib STREQUAL "LLVM${t}ASMPRINTER" OR
48        capitalized_lib STREQUAL "LLVM${t}DISASSEMBLER" OR
49        capitalized_lib STREQUAL "LLVM${t}INFO" )
50      set(${return_var} ON PARENT_SCOPE)
51      break()
52    endif()
53  endforeach()
54endfunction(is_llvm_target_library)
55
56
57macro(llvm_config executable)
58  explicit_llvm_config(${executable} ${ARGN})
59endmacro(llvm_config)
60
61
62function(explicit_llvm_config executable)
63  set( link_components ${ARGN} )
64
65  llvm_map_components_to_libnames(LIBRARIES ${link_components})
66  target_link_libraries(${executable} ${LIBRARIES})
67endfunction(explicit_llvm_config)
68
69
70# This is a variant intended for the final user:
71function(llvm_map_components_to_libraries OUT_VAR)
72  explicit_map_components_to_libraries(result ${ARGN})
73  get_system_libs(sys_result)
74  set( ${OUT_VAR} ${result} ${sys_result} PARENT_SCOPE )
75endfunction(llvm_map_components_to_libraries)
76
77# Map LINK_COMPONENTS to actual libnames.
78function(llvm_map_components_to_libnames out_libs)
79  set( link_components ${ARGN} )
80  get_property(llvm_libs GLOBAL PROPERTY LLVM_LIBS)
81  string(TOUPPER "${llvm_libs}" capitalized_libs)
82
83  # Expand some keywords:
84  list(FIND LLVM_TARGETS_TO_BUILD "${LLVM_NATIVE_ARCH}" have_native_backend)
85  list(FIND link_components "engine" engine_required)
86  if( NOT engine_required EQUAL -1 )
87    list(FIND LLVM_TARGETS_WITH_JIT "${LLVM_NATIVE_ARCH}" have_jit)
88    if( NOT have_native_backend EQUAL -1 AND NOT have_jit EQUAL -1 )
89      list(APPEND link_components "jit")
90      list(APPEND link_components "native")
91    else()
92      list(APPEND link_components "interpreter")
93    endif()
94  endif()
95  list(FIND link_components "native" native_required)
96  if( NOT native_required EQUAL -1 )
97    if( NOT have_native_backend EQUAL -1 )
98      list(APPEND link_components ${LLVM_NATIVE_ARCH})
99    endif()
100  endif()
101
102  # Translate symbolic component names to real libraries:
103  foreach(c ${link_components})
104    # add codegen, asmprinter, asmparser, disassembler
105    list(FIND LLVM_TARGETS_TO_BUILD ${c} idx)
106    if( NOT idx LESS 0 )
107      list(FIND llvm_libs "LLVM${c}CodeGen" idx)
108      if( NOT idx LESS 0 )
109        list(APPEND expanded_components "LLVM${c}CodeGen")
110      else()
111        list(FIND llvm_libs "LLVM${c}" idx)
112        if( NOT idx LESS 0 )
113          list(APPEND expanded_components "LLVM${c}")
114        else()
115          message(FATAL_ERROR "Target ${c} is not in the set of libraries.")
116        endif()
117      endif()
118      list(FIND llvm_libs "LLVM${c}AsmPrinter" asmidx)
119      if( NOT asmidx LESS 0 )
120        list(APPEND expanded_components "LLVM${c}AsmPrinter")
121      endif()
122      list(FIND llvm_libs "LLVM${c}AsmParser" asmidx)
123      if( NOT asmidx LESS 0 )
124        list(APPEND expanded_components "LLVM${c}AsmParser")
125      endif()
126      list(FIND llvm_libs "LLVM${c}Info" asmidx)
127      if( NOT asmidx LESS 0 )
128        list(APPEND expanded_components "LLVM${c}Info")
129      endif()
130      list(FIND llvm_libs "LLVM${c}Disassembler" asmidx)
131      if( NOT asmidx LESS 0 )
132        list(APPEND expanded_components "LLVM${c}Disassembler")
133      endif()
134    elseif( c STREQUAL "native" )
135      # already processed
136    elseif( c STREQUAL "nativecodegen" )
137      list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}CodeGen")
138    elseif( c STREQUAL "backend" )
139      # same case as in `native'.
140    elseif( c STREQUAL "engine" )
141      # already processed
142    elseif( c STREQUAL "all" )
143      list(APPEND expanded_components ${llvm_libs})
144    else( NOT idx LESS 0 )
145      # Canonize the component name:
146      string(TOUPPER "${c}" capitalized)
147      list(FIND capitalized_libs LLVM${capitalized} lib_idx)
148      if( lib_idx LESS 0 )
149        # The component is unknown. Maybe is an omitted target?
150        is_llvm_target_library(${c} iltl_result)
151        if( NOT iltl_result )
152          message(FATAL_ERROR "Library `${c}' not found in list of llvm libraries.")
153        endif()
154      else( lib_idx LESS 0 )
155        list(GET llvm_libs ${lib_idx} canonical_lib)
156        list(APPEND expanded_components ${canonical_lib})
157      endif( lib_idx LESS 0 )
158    endif( NOT idx LESS 0 )
159  endforeach(c)
160
161  set(${out_libs} ${expanded_components} PARENT_SCOPE)
162endfunction()
163
164# Expand dependencies while topologically sorting the list of libraries:
165function(llvm_expand_dependencies out_libs)
166  set(expanded_components ${ARGN})
167  list(LENGTH expanded_components lst_size)
168  set(cursor 0)
169  set(processed)
170  while( cursor LESS lst_size )
171    list(GET expanded_components ${cursor} lib)
172    get_property(lib_deps GLOBAL PROPERTY LLVMBUILD_LIB_DEPS_${lib})
173    list(APPEND expanded_components ${lib_deps})
174    # Remove duplicates at the front:
175    list(REVERSE expanded_components)
176    list(REMOVE_DUPLICATES expanded_components)
177    list(REVERSE expanded_components)
178    list(APPEND processed ${lib})
179    # Find the maximum index that doesn't have to be re-processed:
180    while(NOT "${expanded_components}" MATCHES "^${processed}.*" )
181      list(REMOVE_AT processed -1)
182    endwhile()
183    list(LENGTH processed cursor)
184    list(LENGTH expanded_components lst_size)
185  endwhile( cursor LESS lst_size )
186  set(${out_libs} ${expanded_components} PARENT_SCOPE)
187endfunction()
188
189function(explicit_map_components_to_libraries out_libs)
190  llvm_map_components_to_libnames(link_libs ${ARGN})
191  llvm_expand_dependencies(expanded_components ${link_libs})
192  get_property(llvm_libs GLOBAL PROPERTY LLVM_LIBS)
193  # Return just the libraries included in this build:
194  set(result)
195  foreach(c ${expanded_components})
196    list(FIND llvm_libs ${c} lib_idx)
197    if( NOT lib_idx LESS 0 )
198      set(result ${result} ${c})
199    endif()
200  endforeach(c)
201  set(${out_libs} ${result} PARENT_SCOPE)
202endfunction(explicit_map_components_to_libraries)
203