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1 # Cap'n Proto CMake Package Configuration
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2 #
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3 # When configured and installed, this file enables client projects to find Cap'n Proto using
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4 # CMake's find_package() command. It adds imported targets in the CapnProto:: namespace, such as
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5 # CapnProto::kj, CapnProto::capnp, etc. (one target for each file in pkgconfig/*.pc.in), defines
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6 # the capnp_generate_cpp() function, and exposes some variables for compatibility with the original
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7 # FindCapnProto.cmake module.
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8 #
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9 # Example usage:
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10 # find_package(CapnProto)
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11 # capnp_generate_cpp(CAPNP_SRCS CAPNP_HDRS schema.capnp)
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12 # add_executable(foo main.cpp ${CAPNP_SRCS})
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13 # target_link_libraries(foo PRIVATE CapnProto::capnp)
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14 # target_include_directories(foo PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
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15 #
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16 # If you are using RPC features, use 'CapnProto::capnp-rpc' in the target_link_libraries() call.
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17 #
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18 # Paths to `capnp` and `capnpc-c++` are exposed in the following variables:
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19 # CAPNP_EXECUTABLE
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20 # Path to the `capnp` tool (can be set to override).
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21 # CAPNPC_CXX_EXECUTABLE
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22 # Path to the `capnpc-c++` tool (can be set to override).
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23 #
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24 # For FindCapnProto.cmake compatibility, the following variables are also provided. Please prefer
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25 # using the imported targets in new CMake code.
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26 # CAPNP_INCLUDE_DIRS
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27 # Include directories for the library's headers.
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28 # CANP_LIBRARIES
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29 # The Cap'n Proto library paths.
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30 # CAPNP_LIBRARIES_LITE
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31 # Paths to only the 'lite' libraries.
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32 # CAPNP_DEFINITIONS
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33 # Compiler definitions required for building with the library.
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34 # CAPNP_FOUND
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35 # Set if the libraries have been located (prefer using CapnProto_FOUND in new code).
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36 #
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37 set(CAPNP_PKG_CONFIG_FILES pkgconfig/capnp.pc pkgconfig/capnpc.pc pkgconfig/capnp-rpc.pc pkgconfig/capnp-json.pc pkgconfig/capnp-websocket.pc pkgconfig/kj.pc pkgconfig/kj-async.pc pkgconfig/kj-http.pc pkgconfig/kj-gzip.pc pkgconfig/kj-tls.pc pkgconfig/kj-test.pc )
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38
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39 set(CapnProto_VERSION 1.0.2)
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40
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41 set(CAPNP_EXECUTABLE $<TARGET_FILE:CapnProto::capnp_tool>
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42 CACHE FILEPATH "Location of capnp executable")
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43 set(CAPNPC_CXX_EXECUTABLE $<TARGET_FILE:CapnProto::capnpc_cpp>
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44 CACHE FILEPATH "Location of capnpc-c++ executable")
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45 set(CAPNP_INCLUDE_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}/../../../include")
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46
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47 # work around http://public.kitware.com/Bug/view.php?id=15258
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48 if(NOT _IMPORT_PREFIX)
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49 set(_IMPORT_PREFIX ${PACKAGE_PREFIX_DIR})
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50 endif()
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51
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52 if (NO) # WITH_OPENSSL
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53 include(CMakeFindDependencyMacro)
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54 if (CMAKE_VERSION VERSION_LESS 3.9)
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55 # find_dependency() did not support COMPONENTS until CMake 3.9
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56 #
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57 # in practice, this call can be erroneous
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58 # if the user has only libcrypto installed, but not libssl
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59 find_dependency(OpenSSL)
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60 else()
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61 find_dependency(OpenSSL COMPONENTS Crypto SSL)
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62 endif()
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63 endif()
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64
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65 if (@WITH_ZLIB@) # WITH_ZLIB
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66 include(CMakeFindDependencyMacro)
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67 find_dependency(ZLIB)
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68 endif()
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69
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70 if (NO) # _WITH_LIBUCONTEXT
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71 set(forwarded_config_flags)
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72 if(CapnProto_FIND_QUIETLY)
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73 list(APPEND forwarded_config_flags QUIET)
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74 endif()
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75 if(CapnProto_FIND_REQUIRED)
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76 list(APPEND forwarded_config_flags REQUIRED)
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77 endif()
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78 # If the consuming project called find_package(CapnProto) with the QUIET or REQUIRED flags, forward
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79 # them to calls to find_package(PkgConfig) and pkg_check_modules(). Note that find_dependency()
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80 # would do this for us in the former case, but there is no such forwarding wrapper for
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81 # pkg_check_modules().
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82
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83 find_package(PkgConfig ${forwarded_config_flags})
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84 if(NOT ${PkgConfig_FOUND})
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85 # If we're here, the REQUIRED flag must not have been passed, else we would have had a fatal
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86 # error. Nevertheless, a diagnostic for this case is probably nice.
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87 if(NOT CapnProto_FIND_QUIETLY)
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88 message(WARNING "pkg-config cannot be found")
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89 endif()
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90 set(CapnProto_FOUND OFF)
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91 return()
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92 endif()
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93
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94 if (CMAKE_VERSION VERSION_LESS 3.6)
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95 # CMake >= 3.6 required due to the use of IMPORTED_TARGET
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96 message(SEND_ERROR "libucontext support requires CMake >= 3.6.")
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97 endif()
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98
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99 pkg_check_modules(libucontext IMPORTED_TARGET ${forwarded_config_flags} libucontext)
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100 endif()
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101
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102 include("${CMAKE_CURRENT_LIST_DIR}/CapnProtoTargets.cmake")
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103 include("${CMAKE_CURRENT_LIST_DIR}/CapnProtoMacros.cmake")
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104
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105
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106 # FindCapnProto.cmake provides dependency information via several CAPNP_-prefixed variables. New
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107 # code should not rely on these variables, but prefer linking directly to the imported targets we
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108 # now provide. However, we should still set these variables to ease the transition for projects
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109 # which currently depend on the find-module.
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110
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111 set(CAPNP_INCLUDE_DIRS ${CAPNP_INCLUDE_DIRECTORY})
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112
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113 # No need to list all libraries, just the leaves of the dependency tree.
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114 set(CAPNP_LIBRARIES_LITE CapnProto::capnp)
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115 set(CAPNP_LIBRARIES CapnProto::capnp-rpc CapnProto::capnp-json
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116 CapnProto::kj-http)
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117
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118 set(CAPNP_DEFINITIONS)
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119 if(TARGET CapnProto::capnp AND NOT TARGET CapnProto::capnp-rpc)
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120 set(CAPNP_DEFINITIONS -DCAPNP_LITE)
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121 endif()
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122
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123 set(CAPNP_FOUND ${CapnProto_FOUND})
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