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# Copyright 2017 Google
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
include(CMakeParseArguments)
# cc_library(
# target
# SOURCES sources...
# DEPENDS libraries...
# )
#
# Defines a new library target with the given target name, sources, and dependencies.
function(cc_library name)
set(flag EXCLUDE_FROM_ALL)
set(multi DEPENDS SOURCES)
cmake_parse_arguments(ccl "${flag}" "" "${multi}" ${ARGN})
add_library(
${name}
${ccl_SOURCES}
)
add_objc_flags(${name} ccl)
target_link_libraries(
${name}
PUBLIC
${ccl_DEPENDS}
)
if(ccl_EXCLUDE_FROM_ALL)
set_property(
TARGET ${name}
PROPERTY EXCLUDE_FROM_ALL ON
)
endif()
endfunction()
# cc_test(
# target
# SOURCES sources...
# DEPENDS libraries...
# )
#
# Defines a new test executable target with the given target name, sources, and
# dependencies. Implicitly adds DEPENDS on GTest::GTest and GTest::Main.
function(cc_test name)
set(multi DEPENDS SOURCES)
cmake_parse_arguments(cct "" "" "${multi}" ${ARGN})
list(APPEND cct_DEPENDS GTest::GTest GTest::Main)
add_executable(${name} ${cct_SOURCES})
add_objc_flags(${name} cct)
add_test(${name} ${name})
target_link_libraries(${name} ${cct_DEPENDS})
endfunction()
# add_objc_flags(target sources...)
#
# Adds OBJC_FLAGS to the compile options of the given target if any of the
# sources have filenames that indicate they are are Objective-C.
function(add_objc_flags target)
set(_has_objc OFF)
foreach(source ${ARGN})
get_filename_component(ext ${source} EXT)
if((ext STREQUAL ".m") OR (ext STREQUAL ".mm"))
set(_has_objc ON)
endif()
endforeach()
if(_has_objc)
target_compile_options(
${target}
PRIVATE
${OBJC_FLAGS}
)
endif()
endfunction()
# add_alias(alias_target actual_target)
#
# Adds a library alias target `alias_target` if it does not already exist,
# aliasing to the given `actual_target` target. This allows library dependencies
# to be specified uniformly in terms of the targets found in various
# find_package modules even if the library is being built internally.
function(add_alias ALIAS_TARGET ACTUAL_TARGET)
if(NOT TARGET ${ALIAS_TARGET})
add_library(${ALIAS_TARGET} ALIAS ${ACTUAL_TARGET})
endif()
endfunction()
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