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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_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_CURSES)
14        if(HAVE_NCURSESW)
15          set(system_libs ${system_libs} ncursesw)
16        elseif(HAVE_NCURSES)
17          set(system_libs ${system_libs} ncurses)
18        elseif(HAVE_CURSES)
19          set(system_libs ${system_libs} curses)
20        endif()
21      endif()
22      if( LLVM_ENABLE_THREADS AND HAVE_LIBPTHREAD )
23        set(system_libs ${system_libs} pthread)
24      endif()
25      if ( LLVM_ENABLE_ZLIB AND HAVE_LIBZ )
26        set(system_libs ${system_libs} z)
27      endif()
28    endif( MINGW )
29  endif( NOT MSVC )
30  set(${return_var} ${system_libs} PARENT_SCOPE)
31endfunction(get_system_libs)
32
33
34function(link_system_libs target)
35  get_system_libs(llvm_system_libs)
36  target_link_libraries(${target} ${llvm_system_libs})
37endfunction(link_system_libs)
38
39
40function(is_llvm_target_library library return_var)
41  # Sets variable `return_var' to ON if `library' corresponds to a
42  # LLVM supported target. To OFF if it doesn't.
43  set(${return_var} OFF PARENT_SCOPE)
44  string(TOUPPER "${library}" capitalized_lib)
45  string(TOUPPER "${LLVM_ALL_TARGETS}" targets)
46  foreach(t ${targets})
47    if( capitalized_lib STREQUAL t OR
48	capitalized_lib STREQUAL "LLVM${t}" OR
49	capitalized_lib STREQUAL "LLVM${t}CODEGEN" OR
50	capitalized_lib STREQUAL "LLVM${t}ASMPARSER" OR
51	capitalized_lib STREQUAL "LLVM${t}ASMPRINTER" OR
52	capitalized_lib STREQUAL "LLVM${t}DISASSEMBLER" OR
53	capitalized_lib STREQUAL "LLVM${t}INFO" )
54      set(${return_var} ON PARENT_SCOPE)
55      break()
56    endif()
57  endforeach()
58endfunction(is_llvm_target_library)
59
60
61macro(llvm_config executable)
62  explicit_llvm_config(${executable} ${ARGN})
63endmacro(llvm_config)
64
65
66function(explicit_llvm_config executable)
67  set( link_components ${ARGN} )
68
69  explicit_map_components_to_libraries(LIBRARIES ${link_components})
70  target_link_libraries(${executable} ${LIBRARIES})
71endfunction(explicit_llvm_config)
72
73
74# This is a variant intended for the final user:
75function(llvm_map_components_to_libraries OUT_VAR)
76  explicit_map_components_to_libraries(result ${ARGN})
77  get_system_libs(sys_result)
78  set( ${OUT_VAR} ${result} ${sys_result} PARENT_SCOPE )
79endfunction(llvm_map_components_to_libraries)
80
81
82function(explicit_map_components_to_libraries out_libs)
83  set( link_components ${ARGN} )
84  get_property(llvm_libs GLOBAL PROPERTY LLVM_LIBS)
85  string(TOUPPER "${llvm_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 ${c} idx)
110    if( NOT idx LESS 0 )
111      list(FIND llvm_libs "LLVM${c}CodeGen" idx)
112      if( NOT idx LESS 0 )
113	list(APPEND expanded_components "LLVM${c}CodeGen")
114      else()
115	list(FIND llvm_libs "LLVM${c}" idx)
116	if( NOT idx LESS 0 )
117	  list(APPEND expanded_components "LLVM${c}")
118	else()
119	  message(FATAL_ERROR "Target ${c} is not in the set of libraries.")
120	endif()
121      endif()
122      list(FIND llvm_libs "LLVM${c}AsmPrinter" asmidx)
123      if( NOT asmidx LESS 0 )
124        list(APPEND expanded_components "LLVM${c}AsmPrinter")
125      endif()
126      list(FIND llvm_libs "LLVM${c}AsmParser" asmidx)
127      if( NOT asmidx LESS 0 )
128        list(APPEND expanded_components "LLVM${c}AsmParser")
129      endif()
130      list(FIND llvm_libs "LLVM${c}Info" asmidx)
131      if( NOT asmidx LESS 0 )
132        list(APPEND expanded_components "LLVM${c}Info")
133      endif()
134      list(FIND llvm_libs "LLVM${c}Disassembler" asmidx)
135      if( NOT asmidx LESS 0 )
136        list(APPEND expanded_components "LLVM${c}Disassembler")
137      endif()
138    elseif( c STREQUAL "native" )
139      # already processed
140    elseif( c STREQUAL "nativecodegen" )
141      list(APPEND expanded_components "LLVM${LLVM_NATIVE_ARCH}CodeGen")
142    elseif( c STREQUAL "backend" )
143      # same case as in `native'.
144    elseif( c STREQUAL "engine" )
145      # already processed
146    elseif( c STREQUAL "all" )
147      list(APPEND expanded_components ${llvm_libs})
148    else( NOT idx LESS 0 )
149      # Canonize the component name:
150      string(TOUPPER "${c}" capitalized)
151      list(FIND capitalized_libs LLVM${capitalized} lib_idx)
152      if( lib_idx LESS 0 )
153        # The component is unknown. Maybe is an omitted target?
154        is_llvm_target_library(${c} iltl_result)
155        if( NOT iltl_result )
156          message(FATAL_ERROR "Library `${c}' not found in list of llvm libraries.")
157        endif()
158      else( lib_idx LESS 0 )
159        list(GET llvm_libs ${lib_idx} canonical_lib)
160        list(APPEND expanded_components ${canonical_lib})
161      endif( lib_idx LESS 0 )
162    endif( NOT idx LESS 0 )
163  endforeach(c)
164  # Expand dependencies while topologically sorting the list of libraries:
165  list(LENGTH expanded_components lst_size)
166  set(cursor 0)
167  set(processed)
168  while( cursor LESS lst_size )
169    list(GET expanded_components ${cursor} lib)
170    get_property(lib_deps GLOBAL PROPERTY LLVMBUILD_LIB_DEPS_${lib})
171    list(APPEND expanded_components ${lib_deps})
172    # Remove duplicates at the front:
173    list(REVERSE expanded_components)
174    list(REMOVE_DUPLICATES expanded_components)
175    list(REVERSE expanded_components)
176    list(APPEND processed ${lib})
177    # Find the maximum index that doesn't have to be re-processed:
178    while(NOT "${expanded_components}" MATCHES "^${processed}.*" )
179      list(REMOVE_AT processed -1)
180    endwhile()
181    list(LENGTH processed cursor)
182    list(LENGTH expanded_components lst_size)
183  endwhile( cursor LESS lst_size )
184  # Return just the libraries included in this build:
185  set(result)
186  foreach(c ${expanded_components})
187    list(FIND llvm_libs ${c} lib_idx)
188    if( NOT lib_idx LESS 0 )
189      set(result ${result} ${c})
190    endif()
191  endforeach(c)
192  set(${out_libs} ${result} PARENT_SCOPE)
193endfunction(explicit_map_components_to_libraries)
194