1# CMake build rules for the OCaml language.
2# Assumes FindOCaml is used.
3# http://ocaml.org/
4#
5# Example usage:
6#
7# add_ocaml_library(pkg_a OCAML mod_a OCAMLDEP pkg_b C mod_a_stubs PKG ctypes LLVM core)
8#
9# Unnamed parameters:
10#
11#   * Library name.
12#
13# Named parameters:
14#
15# OCAML     OCaml module names. Imply presence of a corresponding .ml and .mli files.
16# OCAMLDEP  Names of libraries this library depends on.
17# C         C stub sources. Imply presence of a corresponding .c file.
18# CFLAGS    Additional arguments passed when compiling C stubs.
19# PKG       Names of ocamlfind packages this library depends on.
20# LLVM      Names of LLVM libraries this library depends on.
21# NOCOPY    Do not automatically copy sources (.c, .ml, .mli) from the source directory,
22#           e.g. if they are generated.
23#
24
25function(add_ocaml_library name)
26  CMAKE_PARSE_ARGUMENTS(ARG "NOCOPY" "" "OCAML;OCAMLDEP;C;CFLAGS;PKG;LLVM" ${ARGN})
27
28  set(src ${CMAKE_CURRENT_SOURCE_DIR})
29  set(bin ${CMAKE_CURRENT_BINARY_DIR})
30
31  set(ocaml_pkgs)
32  foreach( ocaml_pkg ${ARG_PKG} )
33    list(APPEND ocaml_pkgs "-package" "${ocaml_pkg}")
34  endforeach()
35
36  set(sources)
37
38  set(ocaml_inputs)
39
40  set(ocaml_outputs "${bin}/${name}.cma")
41  if( ARG_C )
42    list(APPEND ocaml_outputs
43         "${bin}/lib${name}${CMAKE_STATIC_LIBRARY_SUFFIX}")
44    if ( BUILD_SHARED_LIBS )
45      list(APPEND ocaml_outputs
46           "${bin}/dll${name}${CMAKE_SHARED_LIBRARY_SUFFIX}")
47    endif()
48  endif()
49  if( HAVE_OCAMLOPT )
50    list(APPEND ocaml_outputs
51         "${bin}/${name}.cmxa"
52         "${bin}/${name}${CMAKE_STATIC_LIBRARY_SUFFIX}")
53  endif()
54
55  set(ocaml_flags "-lstdc++" "-ldopt" "-L${LLVM_LIBRARY_DIR}"
56                  "-ccopt" "-L\\$CAMLORIGIN/.."
57                  "-ccopt" "-Wl,-rpath,\\$CAMLORIGIN/.."
58                  ${ocaml_pkgs})
59
60  foreach( ocaml_dep ${ARG_OCAMLDEP} )
61    get_target_property(dep_ocaml_flags "ocaml_${ocaml_dep}" OCAML_FLAGS)
62    list(APPEND ocaml_flags ${dep_ocaml_flags})
63  endforeach()
64
65  if( NOT BUILD_SHARED_LIBS )
66    list(APPEND ocaml_flags "-custom")
67  endif()
68
69  explicit_map_components_to_libraries(llvm_libs ${ARG_LLVM})
70  foreach( llvm_lib ${llvm_libs} )
71    list(APPEND ocaml_flags "-l${llvm_lib}" )
72  endforeach()
73
74  get_property(system_libs TARGET LLVMSupport PROPERTY LLVM_SYSTEM_LIBS)
75  foreach(system_lib ${system_libs})
76    list(APPEND ocaml_flags "-l${system_lib}" )
77  endforeach()
78
79  string(REPLACE ";" " " ARG_CFLAGS "${ARG_CFLAGS}")
80  set(c_flags "${ARG_CFLAGS} ${LLVM_DEFINITIONS}")
81  foreach( include_dir ${LLVM_INCLUDE_DIR} ${LLVM_MAIN_INCLUDE_DIR} )
82    set(c_flags "${c_flags} -I${include_dir}")
83  endforeach()
84
85  foreach( ocaml_file ${ARG_OCAML} )
86    list(APPEND sources "${ocaml_file}.mli" "${ocaml_file}.ml")
87
88    list(APPEND ocaml_inputs "${bin}/${ocaml_file}.mli" "${bin}/${ocaml_file}.ml")
89
90    list(APPEND ocaml_outputs "${bin}/${ocaml_file}.cmi" "${bin}/${ocaml_file}.cmo")
91    if( HAVE_OCAMLOPT )
92      list(APPEND ocaml_outputs
93           "${bin}/${ocaml_file}.cmx"
94           "${bin}/${ocaml_file}${CMAKE_C_OUTPUT_EXTENSION}")
95    endif()
96  endforeach()
97
98  foreach( c_file ${ARG_C} )
99    list(APPEND sources "${c_file}.c")
100
101    list(APPEND c_inputs  "${bin}/${c_file}.c")
102    list(APPEND c_outputs "${bin}/${c_file}${CMAKE_C_OUTPUT_EXTENSION}")
103  endforeach()
104
105  if( NOT ARG_NOCOPY )
106    foreach( source ${sources} )
107      add_custom_command(
108          OUTPUT "${bin}/${source}"
109          COMMAND "${CMAKE_COMMAND}" "-E" "copy" "${src}/${source}" "${bin}"
110          DEPENDS "${src}/${source}"
111          COMMENT "Copying ${source} to build area")
112    endforeach()
113  endif()
114
115  foreach( c_input ${c_inputs} )
116    get_filename_component(basename "${c_input}" NAME_WE)
117    add_custom_command(
118      OUTPUT "${basename}${CMAKE_C_OUTPUT_EXTENSION}"
119      COMMAND "${OCAMLFIND}" "ocamlc" "-c" "${c_input}" -ccopt ${c_flags}
120      DEPENDS "${c_input}"
121      COMMENT "Building OCaml stub object file ${basename}${CMAKE_C_OUTPUT_EXTENSION}"
122      VERBATIM)
123  endforeach()
124
125  set(ocaml_params)
126  foreach( ocaml_input ${ocaml_inputs} ${c_outputs})
127    get_filename_component(filename "${ocaml_input}" NAME)
128    list(APPEND ocaml_params "${filename}")
129  endforeach()
130
131  if( APPLE )
132    set(ocaml_rpath "@executable_path/../../lib")
133  elseif( UNIX )
134    set(ocaml_rpath "\\$ORIGIN/../../lib")
135  endif()
136  list(APPEND ocaml_flags "-ldopt" "-Wl,-rpath,${ocaml_rpath}")
137
138  add_custom_command(
139    OUTPUT ${ocaml_outputs}
140    COMMAND "${OCAMLFIND}" "ocamlmklib" "-o" "${name}" ${ocaml_flags} ${ocaml_params}
141    DEPENDS ${ocaml_inputs} ${c_outputs}
142    COMMENT "Building OCaml library ${name}"
143    VERBATIM)
144
145  add_custom_command(
146    OUTPUT "${bin}/${name}.odoc"
147    COMMAND "${OCAMLFIND}" "ocamldoc"
148            "-I" "${bin}"
149            "-I" "${LLVM_LIBRARY_DIR}/ocaml/"
150            "-dump" "${bin}/${name}.odoc"
151            ${ocaml_pkgs} ${ocaml_inputs}
152    DEPENDS ${ocaml_inputs}
153    COMMENT "Building OCaml documentation for ${name}"
154    VERBATIM)
155
156  add_custom_target("ocaml_${name}" ALL DEPENDS ${ocaml_outputs} "${bin}/${name}.odoc")
157
158  set_target_properties("ocaml_${name}" PROPERTIES
159    OCAML_FLAGS "-I;${bin}")
160  set_target_properties("ocaml_${name}" PROPERTIES
161    OCAML_ODOC "${bin}/${name}.odoc")
162
163  foreach( ocaml_dep ${ARG_OCAMLDEP} )
164    add_dependencies("ocaml_${name}" "ocaml_${ocaml_dep}")
165  endforeach()
166
167  foreach( llvm_lib ${llvm_libs} )
168    add_dependencies("ocaml_${name}" "${llvm_lib}")
169  endforeach()
170
171  set(install_files)
172  set(install_shlibs)
173  foreach( ocaml_output ${ocaml_outputs} )
174    get_filename_component(ext "${ocaml_output}" EXT)
175
176    if( NOT (ext STREQUAL ".cmo" OR
177             ext STREQUAL CMAKE_C_OUTPUT_EXTENSION OR
178             ext STREQUAL CMAKE_SHARED_LIBRARY_SUFFIX) )
179      list(APPEND install_files "${ocaml_output}")
180    elseif( ext STREQUAL CMAKE_SHARED_LIBRARY_SUFFIX)
181      list(APPEND install_shlibs "${ocaml_output}")
182    endif()
183  endforeach()
184
185  install(FILES ${install_files}
186          DESTINATION lib/ocaml)
187  install(FILES ${install_shlibs}
188          PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
189                      GROUP_READ GROUP_EXECUTE
190                      WORLD_READ WORLD_EXECUTE
191          DESTINATION lib/ocaml)
192
193  foreach( install_file ${install_files} ${install_shlibs} )
194    get_filename_component(filename "${install_file}" NAME)
195    add_custom_command(TARGET "ocaml_${name}" POST_BUILD
196      COMMAND "${CMAKE_COMMAND}" "-E" "copy" "${install_file}"
197                                             "${LLVM_LIBRARY_DIR}/ocaml/"
198      COMMENT "Copying OCaml library component ${filename} to intermediate area"
199      VERBATIM)
200  endforeach()
201endfunction()
202