forked from mirror/capnproto
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
222 lines
9.1 KiB
CMake
222 lines
9.1 KiB
CMake
# This CMake script adds imported targets for each shared library and executable distributed by
|
|
# Cap'n Proto's autotools build.
|
|
#
|
|
# This file IS NOT USED by the CMake build! The CMake build generates its own version of this script
|
|
# from its set of exported targets. I used such a generated script as a reference when writing this
|
|
# one.
|
|
#
|
|
# The set of library targets provided by this script is automatically generated from the list of .pc
|
|
# files maintained in configure.ac. The set of executable targets is hard-coded in this file.
|
|
#
|
|
# You can request that this script print debugging information by invoking cmake with:
|
|
#
|
|
# -DCapnProto_DEBUG=ON
|
|
#
|
|
# TODO(someday): Distinguish between debug and release builds. I.e., set IMPORTED_LOCATION_RELEASE
|
|
# rather than IMPORTED_LOCATION, etc., if this installation was configured as a release build. But
|
|
# how do we tell? grep for -g in CXXFLAGS?
|
|
|
|
if(CMAKE_VERSION VERSION_LESS 3.1)
|
|
message(FATAL_ERROR "CMake >= 3.1 required")
|
|
endif()
|
|
|
|
set(forwarded_config_flags)
|
|
if(CapnProto_FIND_QUIETLY)
|
|
list(APPEND forwarded_config_flags QUIET)
|
|
endif()
|
|
if(CapnProto_FIND_REQUIRED)
|
|
list(APPEND forwarded_config_flags REQUIRED)
|
|
endif()
|
|
# If the consuming project called find_package(CapnProto) with the QUIET or REQUIRED flags, forward
|
|
# them to calls to find_package(PkgConfig) and pkg_check_modules(). Note that find_dependency()
|
|
# would do this for us in the former case, but there is no such forwarding wrapper for
|
|
# pkg_check_modules().
|
|
|
|
find_package(PkgConfig ${forwarded_config_flags})
|
|
if(NOT ${PkgConfig_FOUND})
|
|
# If we're here, the REQUIRED flag must not have been passed, else we would have had a fatal
|
|
# error. Nevertheless, a diagnostic for this case is probably nice.
|
|
if(NOT CapnProto_FIND_QUIETLY)
|
|
message(WARNING "pkg-config cannot be found")
|
|
endif()
|
|
set(CapnProto_FOUND OFF)
|
|
return()
|
|
endif()
|
|
|
|
function(_capnp_import_pkg_config_target target)
|
|
# Add an imported library target named CapnProto::${target}, using the output of various
|
|
# invocations of `pkg-config ${target}`. The generated imported library target tries to mimic the
|
|
# behavior of a real CMake-generated imported target as closely as possible.
|
|
#
|
|
# Usage: _capnp_import_pkg_config_target(target <all Cap'n Proto targets>)
|
|
|
|
set(all_targets ${ARGN})
|
|
|
|
pkg_check_modules(${target} ${forwarded_config_flags} ${target})
|
|
|
|
if(NOT ${${target}_FOUND})
|
|
if(NOT CapnProto_FIND_QUIETLY)
|
|
message(WARNING "CapnProtoConfig.cmake was configured to search for ${target}.pc, but pkg-config cannot find it. Ignoring this target.")
|
|
endif()
|
|
return()
|
|
endif()
|
|
|
|
if(CapnProto_DEBUG)
|
|
# Dump the information pkg-config discovered.
|
|
foreach(var VERSION LIBRARY_DIRS LIBRARIES LDFLAGS_OTHER INCLUDE_DIRS CFLAGS_OTHER)
|
|
message(STATUS "${target}_${var} = ${${target}_${var}}")
|
|
endforeach()
|
|
endif()
|
|
|
|
if(NOT ${${target}_VERSION} VERSION_EQUAL ${CapnProto_VERSION})
|
|
if(NOT CapnProto_FIND_QUIETLY)
|
|
message(WARNING "CapnProtoConfig.cmake was configured to search for version ${CapnProto_VERSION}, but ${target} version ${${target}_VERSION} was found. Ignoring this target.")
|
|
endif()
|
|
return()
|
|
endif()
|
|
|
|
# Make an educated guess as to what the target's .so and .a filenames must be.
|
|
set(target_name_shared
|
|
${CMAKE_SHARED_LIBRARY_PREFIX}${target}-${CapnProto_VERSION}${CMAKE_SHARED_LIBRARY_SUFFIX})
|
|
set(target_name_static
|
|
${CMAKE_STATIC_LIBRARY_PREFIX}${target}${CMAKE_STATIC_LIBRARY_SUFFIX})
|
|
|
|
# Find the actual target's file. find_library() sets a cache variable, so I made the variable name
|
|
# unique-ish.
|
|
find_library(CapnProto_${target}_IMPORTED_LOCATION
|
|
NAMES ${target_name_shared} ${target_name_static} # prefer libfoo-version.so over libfoo.a
|
|
PATHS ${${target}_LIBRARY_DIRS}
|
|
NO_DEFAULT_PATH
|
|
)
|
|
# If the installed version of Cap'n Proto is in a system location, pkg-config will not have filled
|
|
# in ${target}_LIBRARY_DIRS. To account for this, fall back to a regular search.
|
|
find_library(CapnProto_${target}_IMPORTED_LOCATION
|
|
NAMES ${target_name_shared} ${target_name_static} # prefer libfoo-version.so over libfoo.a
|
|
)
|
|
|
|
if(NOT CapnProto_${target}_IMPORTED_LOCATION)
|
|
# Not an error if the library doesn't exist -- we may have found a lite mode installation.
|
|
if(CapnProto_DEBUG)
|
|
message(STATUS "${target} library does not exist")
|
|
endif()
|
|
return()
|
|
endif()
|
|
|
|
# Record some information about this target -- shared versus static, location and soname -- which
|
|
# we'll use to build our imported target later.
|
|
|
|
set(target_location ${CapnProto_${target}_IMPORTED_LOCATION})
|
|
get_filename_component(target_name "${target_location}" NAME)
|
|
|
|
set(target_type STATIC)
|
|
set(imported_soname_property)
|
|
if(target_name STREQUAL ${target_name_shared})
|
|
set(target_type SHARED)
|
|
set(imported_soname_property IMPORTED_SONAME ${target_name})
|
|
endif()
|
|
|
|
# Each library dependency of the target is either the target itself, a sibling Cap'n Proto
|
|
# library, or a system library. We ignore the first case by removing this target from the
|
|
# dependencies. The remaining dependencies are either passed through or, if they are a sibling
|
|
# Cap'n Proto library, prefixed with `CapnProto::`.
|
|
set(dependencies ${${target}_LIBRARIES})
|
|
list(REMOVE_ITEM dependencies ${target})
|
|
set(target_interface_libs)
|
|
foreach(dependency ${dependencies})
|
|
list(FIND all_targets ${dependency} target_index)
|
|
# TODO(cleanup): CMake >= 3.3 lets us write: `if(NOT ${dependency} IN_LIST all_targets)`
|
|
if(target_index EQUAL -1)
|
|
list(APPEND target_interface_libs ${dependency})
|
|
else()
|
|
list(APPEND target_interface_libs CapnProto::${dependency})
|
|
endif()
|
|
endforeach()
|
|
|
|
add_library(CapnProto::${target} ${target_type} IMPORTED)
|
|
set_target_properties(CapnProto::${target} PROPERTIES
|
|
${imported_soname_property}
|
|
IMPORTED_LOCATION "${target_location}"
|
|
# TODO(cleanup): Use cxx_std_14 once it's safe to require cmake 3.8.
|
|
INTERFACE_COMPILE_FEATURES "cxx_generic_lambdas"
|
|
INTERFACE_COMPILE_OPTIONS "${${target}_CFLAGS_OTHER}"
|
|
INTERFACE_INCLUDE_DIRECTORIES "${${target}_INCLUDE_DIRS}"
|
|
|
|
# I'm dumping LDFLAGS_OTHER in with the libraries because there exists no
|
|
# INTERFACE_LINK_OPTIONS. See https://gitlab.kitware.com/cmake/cmake/issues/16543.
|
|
INTERFACE_LINK_LIBRARIES "${target_interface_libs};${${target}_LDFLAGS_OTHER}"
|
|
)
|
|
|
|
if(CapnProto_DEBUG)
|
|
# Dump all the properties we generated for the imported target.
|
|
foreach(prop
|
|
IMPORTED_LOCATION
|
|
IMPORTED_SONAME
|
|
INTERFACE_COMPILE_FEATURES
|
|
INTERFACE_COMPILE_OPTIONS
|
|
INTERFACE_INCLUDE_DIRECTORIES
|
|
INTERFACE_LINK_LIBRARIES)
|
|
get_target_property(value CapnProto::${target} ${prop})
|
|
message(STATUS "CapnProto::${target} ${prop} = ${value}")
|
|
endforeach()
|
|
endif()
|
|
endfunction()
|
|
|
|
# ========================================================================================
|
|
# Imported library targets
|
|
|
|
# Build a list of targets to search for from the list of .pc files.
|
|
# I.e. [somewhere/foo.pc, somewhere/bar.pc] -> [foo, bar]
|
|
set(library_targets)
|
|
foreach(filename ${CAPNP_PKG_CONFIG_FILES})
|
|
get_filename_component(target ${filename} NAME_WE)
|
|
list(APPEND library_targets ${target})
|
|
endforeach()
|
|
|
|
# Try to add an imported library target CapnProto::foo for each foo.pc distributed with Cap'n Proto.
|
|
foreach(target ${library_targets})
|
|
_capnp_import_pkg_config_target(${target} ${library_targets})
|
|
endforeach()
|
|
|
|
# Handle lite-mode and no libraries found cases. It is tempting to set a CapnProto_LITE variable
|
|
# here, but the real CMake-generated implementation does no such thing -- we'd need to set it in
|
|
# CapnProtoConfig.cmake.in itself.
|
|
if(TARGET CapnProto::capnp AND TARGET CapnProto::kj)
|
|
if(NOT TARGET CapnProto::capnp-rpc)
|
|
if(NOT CapnProto_FIND_QUIETLY)
|
|
message(STATUS "Found an installation of Cap'n Proto lite. Executable and library targets beyond libkj and libcapnp will be unavailable.")
|
|
endif()
|
|
# Lite mode doesn't include the executables, so return here.
|
|
return()
|
|
endif()
|
|
else()
|
|
# If we didn't even find capnp or kj, then we didn't find anything usable.
|
|
set(CapnProto_FOUND OFF)
|
|
return()
|
|
endif()
|
|
|
|
# ========================================================================================
|
|
# Imported executable targets
|
|
|
|
get_filename_component(_IMPORT_PREFIX "${CMAKE_CURRENT_LIST_FILE}" PATH)
|
|
get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
|
|
get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
|
|
get_filename_component(_IMPORT_PREFIX "${_IMPORT_PREFIX}" PATH)
|
|
|
|
# Add executable targets for the capnp compiler and plugins. This list must be kept manually in sync
|
|
# with the rest of the project.
|
|
|
|
add_executable(CapnProto::capnp_tool IMPORTED)
|
|
set_target_properties(CapnProto::capnp_tool PROPERTIES
|
|
IMPORTED_LOCATION "${_IMPORT_PREFIX}/bin/capnp${CMAKE_EXECUTABLE_SUFFIX}"
|
|
)
|
|
|
|
add_executable(CapnProto::capnpc_cpp IMPORTED)
|
|
set_target_properties(CapnProto::capnpc_cpp PROPERTIES
|
|
IMPORTED_LOCATION "${_IMPORT_PREFIX}/bin/capnpc-c++${CMAKE_EXECUTABLE_SUFFIX}"
|
|
)
|
|
|
|
add_executable(CapnProto::capnpc_capnp IMPORTED)
|
|
set_target_properties(CapnProto::capnpc_capnp PROPERTIES
|
|
IMPORTED_LOCATION "${_IMPORT_PREFIX}/bin/capnpc-capnp${CMAKE_EXECUTABLE_SUFFIX}"
|
|
)
|