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comparison CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/lib/cmake/CapnProto/CapnProtoTargets.cmake @ 68:5028fdace37b

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planemo upload commit 2e9511a184a1ca667c7be0c6321a36dc4e3d116d
author jpayne
date Tue, 18 Mar 2025 16:23:26 -0400
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67:0e9998148a16 68:5028fdace37b
1 # This CMake script adds imported targets for each shared library and executable distributed by
2 # Cap'n Proto's autotools build.
3 #
4 # This file IS NOT USED by the CMake build! The CMake build generates its own version of this script
5 # from its set of exported targets. I used such a generated script as a reference when writing this
6 # one.
7 #
8 # The set of library targets provided by this script is automatically generated from the list of .pc
9 # files maintained in configure.ac. The set of executable targets is hard-coded in this file.
10 #
11 # You can request that this script print debugging information by invoking cmake with:
12 #
13 # -DCapnProto_DEBUG=ON
14 #
15 # TODO(someday): Distinguish between debug and release builds. I.e., set IMPORTED_LOCATION_RELEASE
16 # rather than IMPORTED_LOCATION, etc., if this installation was configured as a release build. But
17 # how do we tell? grep for -g in CXXFLAGS?
18
19 if(CMAKE_VERSION VERSION_LESS 3.1)
20 message(FATAL_ERROR "CMake >= 3.1 required")
21 endif()
22
23 set(forwarded_config_flags)
24 if(CapnProto_FIND_QUIETLY)
25 list(APPEND forwarded_config_flags QUIET)
26 endif()
27 if(CapnProto_FIND_REQUIRED)
28 list(APPEND forwarded_config_flags REQUIRED)
29 endif()
30 # If the consuming project called find_package(CapnProto) with the QUIET or REQUIRED flags, forward
31 # them to calls to find_package(PkgConfig) and pkg_check_modules(). Note that find_dependency()
32 # would do this for us in the former case, but there is no such forwarding wrapper for
33 # pkg_check_modules().
34
35 find_package(PkgConfig ${forwarded_config_flags})
36 if(NOT ${PkgConfig_FOUND})
37 # If we're here, the REQUIRED flag must not have been passed, else we would have had a fatal
38 # error. Nevertheless, a diagnostic for this case is probably nice.
39 if(NOT CapnProto_FIND_QUIETLY)
40 message(WARNING "pkg-config cannot be found")
41 endif()
42 set(CapnProto_FOUND OFF)
43 return()
44 endif()
45
46 function(_capnp_import_pkg_config_target target)
47 # Add an imported library target named CapnProto::${target}, using the output of various
48 # invocations of `pkg-config ${target}`. The generated imported library target tries to mimic the
49 # behavior of a real CMake-generated imported target as closely as possible.
50 #
51 # Usage: _capnp_import_pkg_config_target(target <all Cap'n Proto targets>)
52
53 set(all_targets ${ARGN})
54
55 pkg_check_modules(${target} ${forwarded_config_flags} ${target})
56
57 if(NOT ${${target}_FOUND})
58 if(NOT CapnProto_FIND_QUIETLY)
59 message(WARNING "CapnProtoConfig.cmake was configured to search for ${target}.pc, but pkg-config cannot find it. Ignoring this target.")
60 endif()
61 return()
62 endif()
63
64 if(CapnProto_DEBUG)
65 # Dump the information pkg-config discovered.
66 foreach(var VERSION LIBRARY_DIRS LIBRARIES LDFLAGS_OTHER INCLUDE_DIRS CFLAGS_OTHER)
67 message(STATUS "${target}_${var} = ${${target}_${var}}")
68 endforeach()
69 endif()
70
71 if(NOT ${${target}_VERSION} VERSION_EQUAL ${CapnProto_VERSION})
72 if(NOT CapnProto_FIND_QUIETLY)
73 message(WARNING "CapnProtoConfig.cmake was configured to search for version ${CapnProto_VERSION}, but ${target} version ${${target}_VERSION} was found. Ignoring this target.")
74 endif()
75 return()
76 endif()
77
78 # Make an educated guess as to what the target's .so and .a filenames must be.
79 set(target_name_shared
80 ${CMAKE_SHARED_LIBRARY_PREFIX}${target}-${CapnProto_VERSION}${CMAKE_SHARED_LIBRARY_SUFFIX})
81 set(target_name_static
82 ${CMAKE_STATIC_LIBRARY_PREFIX}${target}${CMAKE_STATIC_LIBRARY_SUFFIX})
83
84 # Find the actual target's file. find_library() sets a cache variable, so I made the variable name
85 # unique-ish.
86 find_library(CapnProto_${target}_IMPORTED_LOCATION
87 NAMES ${target_name_shared} ${target_name_static} # prefer libfoo-version.so over libfoo.a
88 PATHS ${${target}_LIBRARY_DIRS}
89 NO_DEFAULT_PATH
90 )
91 # If the installed version of Cap'n Proto is in a system location, pkg-config will not have filled
92 # in ${target}_LIBRARY_DIRS. To account for this, fall back to a regular search.
93 find_library(CapnProto_${target}_IMPORTED_LOCATION
94 NAMES ${target_name_shared} ${target_name_static} # prefer libfoo-version.so over libfoo.a
95 )
96
97 if(NOT CapnProto_${target}_IMPORTED_LOCATION)
98 # Not an error if the library doesn't exist -- we may have found a lite mode installation.
99 if(CapnProto_DEBUG)
100 message(STATUS "${target} library does not exist")
101 endif()
102 return()
103 endif()
104
105 # Record some information about this target -- shared versus static, location and soname -- which
106 # we'll use to build our imported target later.
107
108 set(target_location ${CapnProto_${target}_IMPORTED_LOCATION})
109 get_filename_component(target_name "${target_location}" NAME)
110
111 set(target_type STATIC)
112 set(imported_soname_property)
113 if(target_name STREQUAL ${target_name_shared})
114 set(target_type SHARED)
115 set(imported_soname_property IMPORTED_SONAME ${target_name})
116 endif()
117
118 # Each library dependency of the target is either the target itself, a sibling Cap'n Proto
119 # library, or a system library. We ignore the first case by removing this target from the
120 # dependencies. The remaining dependencies are either passed through or, if they are a sibling
121 # Cap'n Proto library, prefixed with `CapnProto::`.
122 set(dependencies ${${target}_LIBRARIES})
123 list(REMOVE_ITEM dependencies ${target})
124 set(target_interface_libs)
125 foreach(dependency ${dependencies})
126 list(FIND all_targets ${dependency} target_index)
127 # TODO(cleanup): CMake >= 3.3 lets us write: `if(NOT ${dependency} IN_LIST all_targets)`
128 if(target_index EQUAL -1)
129 list(APPEND target_interface_libs ${dependency})
130 else()
131 list(APPEND target_interface_libs CapnProto::${dependency})
132 endif()
133 endforeach()
134
135 add_library(CapnProto::${target} ${target_type} IMPORTED)
136 set_target_properties(CapnProto::${target} PROPERTIES
137 ${imported_soname_property}
138 IMPORTED_LOCATION "${target_location}"
139 # TODO(cleanup): Use cxx_std_14 once it's safe to require cmake 3.8.
140 INTERFACE_COMPILE_FEATURES "cxx_generic_lambdas"
141 INTERFACE_COMPILE_OPTIONS "${${target}_CFLAGS_OTHER}"
142 INTERFACE_INCLUDE_DIRECTORIES "${${target}_INCLUDE_DIRS}"
143
144 # I'm dumping LDFLAGS_OTHER in with the libraries because there exists no
145 # INTERFACE_LINK_OPTIONS. See https://gitlab.kitware.com/cmake/cmake/issues/16543.
146 INTERFACE_LINK_LIBRARIES "${target_interface_libs};${${target}_LDFLAGS_OTHER}"
147 )
148
149 if(CapnProto_DEBUG)
150 # Dump all the properties we generated for the imported target.
151 foreach(prop
152 IMPORTED_LOCATION
153 IMPORTED_SONAME
154 INTERFACE_COMPILE_FEATURES
155 INTERFACE_COMPILE_OPTIONS
156 INTERFACE_INCLUDE_DIRECTORIES
157 INTERFACE_LINK_LIBRARIES)
158 get_target_property(value CapnProto::${target} ${prop})
159 message(STATUS "CapnProto::${target} ${prop} = ${value}")
160 endforeach()
161 endif()
162 endfunction()
163
164 # ========================================================================================
165 # Imported library targets
166
167 # Build a list of targets to search for from the list of .pc files.
168 # I.e. [somewhere/foo.pc, somewhere/bar.pc] -> [foo, bar]
169 set(library_targets)
170 foreach(filename ${CAPNP_PKG_CONFIG_FILES})
171 get_filename_component(target ${filename} NAME_WE)
172 list(APPEND library_targets ${target})
173 endforeach()
174
175 # Try to add an imported library target CapnProto::foo for each foo.pc distributed with Cap'n Proto.
176 foreach(target ${library_targets})
177 _capnp_import_pkg_config_target(${target} ${library_targets})
178 endforeach()
179
180 # Handle lite-mode and no libraries found cases. It is tempting to set a CapnProto_LITE variable
181 # here, but the real CMake-generated implementation does no such thing -- we'd need to set it in
182 # CapnProtoConfig.cmake.in itself.
183 if(TARGET CapnProto::capnp AND TARGET CapnProto::kj)
184 if(NOT TARGET CapnProto::capnp-rpc)
185 if(NOT CapnProto_FIND_QUIETLY)
186 message(STATUS "Found an installation of Cap'n Proto lite. Executable and library targets beyond libkj and libcapnp will be unavailable.")
187 endif()
188 # Lite mode doesn't include the executables, so return here.
189 return()
190 endif()
191 else()
192 # If we didn't even find capnp or kj, then we didn't find anything usable.
193 set(CapnProto_FOUND OFF)
194 return()
195 endif()
196
197 # ========================================================================================
198 # Imported executable targets
199
200 get_filename_component(_IMPORT_PREFIX "${CMAKE_CURRENT_LIST_FILE}" PATH)
201 get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
202 get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
203 get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
204
205 # Add executable targets for the capnp compiler and plugins. This list must be kept manually in sync
206 # with the rest of the project.
207
208 add_executable(CapnProto::capnp_tool IMPORTED)
209 set_target_properties(CapnProto::capnp_tool PROPERTIES
210 IMPORTED_LOCATION "${_IMPORT_PREFIX}/bin/capnp${CMAKE_EXECUTABLE_SUFFIX}"
211 )
212
213 add_executable(CapnProto::capnpc_cpp IMPORTED)
214 set_target_properties(CapnProto::capnpc_cpp PROPERTIES
215 IMPORTED_LOCATION "${_IMPORT_PREFIX}/bin/capnpc-c++${CMAKE_EXECUTABLE_SUFFIX}"
216 )
217
218 add_executable(CapnProto::capnpc_capnp IMPORTED)
219 set_target_properties(CapnProto::capnpc_capnp PROPERTIES
220 IMPORTED_LOCATION "${_IMPORT_PREFIX}/bin/capnpc-capnp${CMAKE_EXECUTABLE_SUFFIX}"
221 )