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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)
6    elseif( CMAKE_HOST_UNIX )
7      if( HAVE_LIBDL )
8	set(system_libs ${system_libs} ${CMAKE_DL_LIBS})
9      endif()
10      if( LLVM_ENABLE_THREADS AND HAVE_LIBPTHREAD )
11	set(system_libs ${system_libs} pthread)
12      endif()
13    endif( MINGW )
14  endif( NOT MSVC )
15  set(${return_var} ${system_libs} PARENT_SCOPE)
16endfunction(get_system_libs)
17
18
19function(link_system_libs target)
20  get_system_libs(llvm_system_libs)
21  target_link_libraries(${target} ${llvm_system_libs})
22endfunction(link_system_libs)
23
24
25function(is_llvm_target_library library return_var)
26  # Sets variable `return_var' to ON if `library' corresponds to a
27  # LLVM supported target. To OFF if it doesn't.
28  set(${return_var} OFF PARENT_SCOPE)
29  string(TOUPPER "${library}" capitalized_lib)
30  string(TOUPPER "${LLVM_ALL_TARGETS}" targets)
31  foreach(t ${targets})
32    if( capitalized_lib STREQUAL t OR
33	capitalized_lib STREQUAL "LLVM${t}" OR
34	capitalized_lib STREQUAL "LLVM${t}CODEGEN" OR
35	capitalized_lib STREQUAL "LLVM${t}ASMPARSER" OR
36	capitalized_lib STREQUAL "LLVM${t}ASMPRINTER" OR
37	capitalized_lib STREQUAL "LLVM${t}DISASSEMBLER" OR
38	capitalized_lib STREQUAL "LLVM${t}INFO" )
39      set(${return_var} ON PARENT_SCOPE)
40      break()
41    endif()
42  endforeach()
43endfunction(is_llvm_target_library)
44
45
46macro(llvm_config executable)
47  explicit_llvm_config(${executable} ${ARGN})
48endmacro(llvm_config)
49
50
51function(explicit_llvm_config executable)
52  set( link_components ${ARGN} )
53
54  explicit_map_components_to_libraries(LIBRARIES ${link_components})
55  target_link_libraries(${executable} ${LIBRARIES})
56endfunction(explicit_llvm_config)
57
58
59# This is a variant intended for the final user:
60function(llvm_map_components_to_libraries OUT_VAR)
61  explicit_map_components_to_libraries(result ${ARGN})
62  get_system_libs(sys_result)
63  set( ${OUT_VAR} ${result} ${sys_result} PARENT_SCOPE )
64endfunction(llvm_map_components_to_libraries)
65
66
67function(explicit_map_components_to_libraries out_libs)
68  set( link_components ${ARGN} )
69  get_property(llvm_libs GLOBAL PROPERTY LLVM_LIBS)
70  string(TOUPPER "${llvm_libs}" capitalized_libs)
71
72  # Expand some keywords:
73  list(FIND LLVM_TARGETS_TO_BUILD "${LLVM_NATIVE_ARCH}" have_native_backend)
74  list(FIND link_components "engine" engine_required)
75  if( NOT engine_required EQUAL -1 )
76    list(FIND LLVM_TARGETS_WITH_JIT "${LLVM_NATIVE_ARCH}" have_jit)
77    if( NOT have_native_backend EQUAL -1 AND NOT have_jit EQUAL -1 )
78      list(APPEND link_components "jit")
79      list(APPEND link_components "native")
80    else()
81      list(APPEND link_components "interpreter")
82    endif()
83  endif()
84  list(FIND link_components "native" native_required)
85  if( NOT native_required EQUAL -1 )
86    if( NOT have_native_backend EQUAL -1 )
87      list(APPEND link_components ${LLVM_NATIVE_ARCH})
88    endif()
89  endif()
90
91  # Translate symbolic component names to real libraries:
92  foreach(c ${link_components})
93    # add codegen, asmprinter, asmparser, disassembler
94    list(FIND LLVM_TARGETS_TO_BUILD ${c} idx)
95    if( NOT idx LESS 0 )
96      list(FIND llvm_libs "LLVM${c}CodeGen" idx)
97      if( NOT idx LESS 0 )
98	list(APPEND expanded_components "LLVM${c}CodeGen")
99      else()
100	list(FIND llvm_libs "LLVM${c}" idx)
101	if( NOT idx LESS 0 )
102	  list(APPEND expanded_components "LLVM${c}")
103	else()
104	  message(FATAL_ERROR "Target ${c} is not in the set of libraries.")
105	endif()
106      endif()
107      list(FIND llvm_libs "LLVM${c}AsmPrinter" asmidx)
108      if( NOT asmidx LESS 0 )
109        list(APPEND expanded_components "LLVM${c}AsmPrinter")
110      endif()
111      list(FIND llvm_libs "LLVM${c}AsmParser" asmidx)
112      if( NOT asmidx LESS 0 )
113        list(APPEND expanded_components "LLVM${c}AsmParser")
114      endif()
115      list(FIND llvm_libs "LLVM${c}Info" asmidx)
116      if( NOT asmidx LESS 0 )
117        list(APPEND expanded_components "LLVM${c}Info")
118      endif()
119      list(FIND llvm_libs "LLVM${c}Disassembler" asmidx)
120      if( NOT asmidx LESS 0 )
121        list(APPEND expanded_components "LLVM${c}Disassembler")
122      endif()
123    elseif( c STREQUAL "native" )
124      # already processed
125    elseif( c STREQUAL "nativecodegen" )
126      list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}CodeGen")
127    elseif( c STREQUAL "backend" )
128      # same case as in `native'.
129    elseif( c STREQUAL "engine" )
130      # already processed
131    elseif( c STREQUAL "all" )
132      list(APPEND expanded_components ${llvm_libs})
133    else( NOT idx LESS 0 )
134      # Canonize the component name:
135      string(TOUPPER "${c}" capitalized)
136      list(FIND capitalized_libs LLVM${capitalized} lib_idx)
137      if( lib_idx LESS 0 )
138	# The component is unknown. Maybe is an omitted target?
139	is_llvm_target_library(${c} iltl_result)
140	if( NOT iltl_result )
141	  message(FATAL_ERROR "Library `${c}' not found in list of llvm libraries.")
142	endif()
143      else( lib_idx LESS 0 )
144	list(GET llvm_libs ${lib_idx} canonical_lib)
145	list(APPEND expanded_components ${canonical_lib})
146      endif( lib_idx LESS 0 )
147    endif( NOT idx LESS 0 )
148  endforeach(c)
149  # Expand dependencies while topologically sorting the list of libraries:
150  list(LENGTH expanded_components lst_size)
151  set(cursor 0)
152  set(processed)
153  while( cursor LESS lst_size )
154    list(GET expanded_components ${cursor} lib)
155    list(APPEND expanded_components ${MSVC_LIB_DEPS_${lib}})
156    # Remove duplicates at the front:
157    list(REVERSE expanded_components)
158    list(REMOVE_DUPLICATES expanded_components)
159    list(REVERSE expanded_components)
160    list(APPEND processed ${lib})
161    # Find the maximum index that doesn't have to be re-processed:
162    while(NOT "${expanded_components}" MATCHES "^${processed}.*" )
163      list(REMOVE_AT processed -1)
164    endwhile()
165    list(LENGTH processed cursor)
166    list(LENGTH expanded_components lst_size)
167  endwhile( cursor LESS lst_size )
168  # Return just the libraries included in this build:
169  set(result)
170  foreach(c ${expanded_components})
171    list(FIND llvm_libs ${c} lib_idx)
172    if( NOT lib_idx LESS 0 )
173      set(result ${result} ${c})
174    endif()
175  endforeach(c)
176  set(${out_libs} ${result} PARENT_SCOPE)
177endfunction(explicit_map_components_to_libraries)
178
179
180# The library dependency data is contained in the file
181# LLVMLibDeps.cmake on this directory. It is automatically generated
182# by tools/llvm-config/CMakeLists.txt when the build comprises all the
183# targets and we are on a environment Posix enough to build the
184# llvm-config script. This, in practice, just excludes MSVC.
185
186# When you remove or rename a library from the build, be sure to
187# remove its file from lib/ as well, or the GenLibDeps.pl script will
188# include it on its analysis!
189
190# The format generated by GenLibDeps.pl
191
192# LLVMARMAsmPrinter.o: LLVMARMCodeGen.o libLLVMAsmPrinter.a libLLVMCodeGen.a libLLVMCore.a libLLVMSupport.a libLLVMTarget.a
193
194# is translated to:
195
196# set(MSVC_LIB_DEPS_LLVMARMAsmPrinter LLVMARMCodeGen LLVMAsmPrinter LLVMCodeGen LLVMCore LLVMSupport LLVMTarget)
197
198# It is necessary to remove the `lib' prefix and the `.a'.
199
200# This 'sed' script should do the trick:
201# sed -e s'#\.a##g' -e 's#libLLVM#LLVM#g' -e 's#: # #' -e 's#\(.*\)#set(MSVC_LIB_DEPS_\1)#' ~/llvm/tools/llvm-config/LibDeps.txt
202
203include(LLVMLibDeps)
204