Boost include directories are now tied to targets directly

Boost is required for cppnetlib & related projects. Thus, it should transitively provided include directories to its own source as well as the include directories to its dependencies (Boost in this case). That way if there are other CMake targets that depend on cppnetlib but not Boost directly, it will still be able to compile cppnetlib headers that include boost headers. The include directories are tied to respective targets via the new target_include_directories() CMake command. This requires a newer version of CMake (v3.0 minimum).
cpp-netlib · deanberris · Oct 16, 2015 · Aug 6, 2015 · Oct 8, 2015 · Oct 11, 2015
commit d78f0edf74c764427c2d437005a28c3a5b9185ab
diff --git a/.travis.yml b/.travis.yml
@@ -14,6 +14,7 @@ env:
 before_install:
     - sudo add-apt-repository ppa:apokluda/boost1.53 --yes
     - sudo add-apt-repository ppa:ubuntu-toolchain-r/test --yes # libstdc++-4.8
+    - sudo add-apt-repository ppa:george-edison55/cmake-3.x --yes
     - if [ "${CXX}" == "clang++" ]; then sudo add-apt-repository --yes ppa:h-rayflood/llvm; fi # clang++-3.2
     - sudo apt-get update
 
@@ -23,6 +24,7 @@ install:
     - sudo apt-get install libboost-system1.53-dev
     - sudo apt-get install libboost-regex1.53-dev
     - sudo apt-get install libboost-filesystem1.53-dev
+    - sudo apt-get install cmake
 
 before_script:
     # update compilers

diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -5,7 +5,7 @@
 # (See accompanying file LICENSE_1_0.txt or copy at
 # http://www.boost.org/LICENSE_1_0.txt)
 
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project(CPP-NETLIB)
 
 option( CPP-NETLIB_BUILD_SHARED_LIBS "Build cpp-netlib as shared libraries." OFF )
@@ -84,7 +84,6 @@ endif(MSVC)
 if (WIN32)
   add_definitions(-D_WIN32_WINNT=0x0501)
 endif(WIN32)
-include_directories(${Boost_INCLUDE_DIRS})
 
 message(STATUS "CPP-NETLIB options selected:")
 message(STATUS "  CPP-NETLIB_BUILD_SHARED_LIBS:      ${CPP-NETLIB_BUILD_SHARED_LIBS}\t(Build cpp-netlib as shared libraries: OFF, ON)")
@@ -157,7 +156,7 @@ if (DOXYGEN_FOUND)
 endif(DOXYGEN_FOUND)
 
 if(CPP-NETLIB_BUILD_SINGLE_LIB)
-  include_directories(
+  set( all_include_dirs
     ${CMAKE_CURRENT_SOURCE_DIR}/config/src
     ${CMAKE_CURRENT_SOURCE_DIR}/concurrency/src
     ${CMAKE_CURRENT_SOURCE_DIR}/http/src
@@ -194,4 +193,5 @@ if(CPP-NETLIB_BUILD_SINGLE_LIB)
     ${CPP-NETLIB_CONCURRENCY_SRCS}
   )
   target_link_libraries(cppnetlib ${Boost_LIBRARIES})
+  target_include_directories(cppnetlib PUBLIC ${all_include_dirs} ${Boost_INCLUDE_DIRS})
 endif()
diff --git a/concurrency/src/CMakeLists.txt b/concurrency/src/CMakeLists.txt
@@ -10,6 +10,7 @@ set(CPP-NETLIB_CONCURRENCY_SRCS
 
 if(NOT CPP-NETLIB_BUILD_SINGLE_LIB)
   add_library(network-concurrency ${CPP-NETLIB_CONCURRENCY_SRCS})
+  target_include_directories(network-concurrency PUBLIC ${Boost_INCLUDE_DIRS})
 endif()
 
 # prepend current directory to make paths absolute

diff --git a/concurrency/test/CMakeLists.txt b/concurrency/test/CMakeLists.txt
@@ -14,6 +14,7 @@ if (CPP-NETLIB_BUILD_TESTS)
     ${Boost_LIBRARIES}
     ${GTEST_BOTH_LIBRARIES}
     ${CMAKE_THREAD_LIBS_INIT})
+  target_include_directories(cpp-netlib-thread_pool_test PUBLIC ${Boost_INCLUDE_DIRS})
   set_target_properties(cpp-netlib-thread_pool_test PROPERTIES
     RUNTIME_OUTPUT_DIRECTORY ${CPP-NETLIB_BINARY_DIR}/tests)
   add_test(cpp-netlib-thread_pool_test

diff --git a/contrib/http_examples/CMakeLists.txt b/contrib/http_examples/CMakeLists.txt
@@ -33,5 +33,6 @@ foreach(example ${EXAMPLES})
     ${ICU_LIBRARIES} ${ICU_I18N_LIBRARIES}
     ${CMAKE_THREAD_LIBS_INIT}
     )
+  target_include_directories(${example} PUBLIC ${Boost_INCLUDE_DIRS})
   set_target_properties(${example} PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CPP-NETLIB_BINARY_DIR}/example)
 endforeach(example)
diff --git a/http/src/CMakeLists.txt b/http/src/CMakeLists.txt
@@ -28,20 +28,23 @@ if(NOT CPP-NETLIB_BUILD_SINGLE_LIB)
   target_link_libraries(network-http-message
     ${Boost_LIBRARIES}
     network-message)
+  target_include_directories(network-http-message PUBLIC ${Boost_INCLUDE_DIRS})
 endif()
 
 set(CPP-NETLIB_HTTP_MESSAGE_WRAPPERS_SRCS
     http/message/wrappers.cpp)
 
 if(NOT CPP-NETLIB_BUILD_SINGLE_LIB)
   add_library(network-http-message-wrappers ${CPP-NETLIB_HTTP_MESSAGE_WRAPPERS_SRCS})
+  target_include_directories(network-http-message-wrappers PUBLIC ${Boost_INCLUDE_DIRS})
 endif()
 
 set(CPP-NETLIB_CONSTANTS_SRCS
     constants.cpp)
 
 if(NOT CPP-NETLIB_BUILD_SINGLE_LIB)
   add_library(network-constants ${CPP-NETLIB_CONSTANTS_SRCS})
+  target_include_directories(network-constants PUBLIC ${Boost_INCLUDE_DIRS})
 endif()
 
 # Server implementation files.
@@ -52,6 +55,7 @@ set(CPP-NETLIB_HTTP_SERVER_SRCS
 
 if (NOT CPP-NETLIB_BUILD_SINGLE_LIB)
   add_library(network-http-server ${CPP-NETLIB_HTTP_SERVER_SRCS})
+  target_include_directories(network-http-server PUBLIC ${Boost_INCLUDE_DIRS})
 endif()
 
 # HTTP client
@@ -64,6 +68,7 @@ target_link_libraries(network-http-v2-client
   ${Boost_LIBRARIES}
   network-uri
   )
+target_include_directories(network-http-v2-client PUBLIC ${Boost_INCLUDE_DIRS})
 if (OPENSSL_FOUND)
   target_link_libraries(network-http-v2-client ${OPENSSL_LIBRARIES})
 endif()

diff --git a/http/test/CMakeLists.txt b/http/test/CMakeLists.txt
@@ -58,6 +58,7 @@ if (CPP-NETLIB_BUILD_TESTS)
       ${ICU_LIBRARIES} ${ICU_I18N_LIBRARIES}
       ${CMAKE_THREAD_LIBS_INIT}
       ${CPPNETLIB_LIBRARIES} )
+    target_include_directories(cpp-netlib-http-${test} PUBLIC ${Boost_INCLUDE_DIRS})
     set_target_properties(cpp-netlib-http-${test}
       PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CPP-NETLIB_BINARY_DIR}/tests)
     add_test(cpp-netlib-http-${test}
@@ -91,6 +92,7 @@ if (CPP-NETLIB_BUILD_TESTS)
       ${GTEST_BOTH_LIBRARIES}
       ${CMAKE_THREAD_LIBS_INIT}
       ${CPPNETLIB_SERVER_LIBRARIES} )
+    target_include_directories(cpp-netlib-http-${test} PUBLIC ${Boost_INCLUDE_DIRS})
     set_target_properties(cpp-netlib-http-${test} PROPERTIES
       RUNTIME_OUTPUT_DIRECTORY ${CPP-NETLIB_BINARY_DIR}/tests)
     add_test(cpp-netlib-http-${test}

diff --git a/http/test/v2/client/features/CMakeLists.txt b/http/test/v2/client/features/CMakeLists.txt
@@ -27,6 +27,7 @@ foreach(test ${CPP-NETLIB_CLIENT_TESTS})
     ${ICU_LIBRARIES} ${ICU_I18N_LIBRARIES}
     ${CMAKE_THREAD_LIBS_INIT}
     )
+  target_include_directories(cpp-netlib-http-v2-${test} PUBLIC ${Boost_INCLUDE_DIRS})
   set_target_properties(cpp-netlib-http-v2-${test}
     PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CPP-NETLIB_BINARY_DIR}/tests)
   add_test(cpp-netlib-http-v2-${test}

diff --git a/http/test/v2/client/units/CMakeLists.txt b/http/test/v2/client/units/CMakeLists.txt
@@ -29,6 +29,7 @@ foreach(test ${CPP-NETLIB_CLIENT_TESTS})
     ${ICU_LIBRARIES} ${ICU_I18N_LIBRARIES}
     ${CMAKE_THREAD_LIBS_INIT}
     )
+  target_include_directories(cpp-netlib-http-v2-${test} PUBLIC ${Boost_INCLUDE_DIRS})
   set_target_properties(cpp-netlib-http-v2-${test}
     PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CPP-NETLIB_BINARY_DIR}/tests)
   add_test(cpp-netlib-http-v2-${test}

diff --git a/logging/test/CMakeLists.txt b/logging/test/CMakeLists.txt
@@ -28,6 +28,7 @@ if (CPP-NETLIB_BUILD_TESTS)
     add_executable(cpp-netlib-${test} ${test}.cpp)
     target_link_libraries(cpp-netlib-${test}
       ${Boost_LIBRARIES} ${GTEST_BOTH_LIBRARIES} ${link_cppnetlib_lib})
+    target_include_directories(cpp-netlib-${test} PUBLIC ${Boost_INCLUDE_DIRS})
     set_target_properties(cpp-netlib-${test}
       PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CPP-NETLIB_BINARY_DIR}/tests)
     add_test(cpp-netlib-${test}

diff --git a/message/src/CMakeLists.txt b/message/src/CMakeLists.txt
@@ -11,17 +11,20 @@ set(CPP-NETLIB_MESSAGE_SRCS
     message.cpp)
 
 add_library(network-message ${CPP-NETLIB_MESSAGE_SRCS})
+target_include_directories(network-message PUBLIC ${Boost_INCLUDE_DIRS})
 target_link_libraries(network-message network-uri)
 
 set(CPP-NETLIB_MESSAGE_DIRECTIVES_SRCS
     directives.cpp)
 
 add_library(network-message-directives ${CPP-NETLIB_MESSAGE_DIRECTIVES_SRCS})
+target_include_directories(network-message-directives PUBLIC ${Boost_INCLUDE_DIRS})
 
 set(CPP-NETLIB_MESSAGE_WRAPPERS_SRCS
     wrappers.cpp)
 
 add_library(network-message-wrappers ${CPP-NETLIB_MESSAGE_WRAPPERS_SRCS})
+target_include_directories(network-message-wrappers PUBLIC ${Boost_INCLUDE_DIRS})
 
 # prepend current directory to make paths absolute
 prependToElements( "${CMAKE_CURRENT_SOURCE_DIR}/"