Upgrade to yaml-cpp 0.7.0

This includes a fix for macOS/Linux where newer yaml-cpp
moved the cmake files from
$prefix/opt/yaml_cpp_vendor/lib/cmake/yaml-cpp into
$prefix/opt/yaml_cpp_vendor/share/cmake/yaml-cpp

Signed-off-by: Chris Lalancette <clalancette@openrobotics.org>

CMakeLists.txt

@@ -8,8 +8,6 @@ option(FORCE_BUILD_VENDOR_PKG
 
 find_package(ament_cmake REQUIRED)
 
-set(PACKAGE_VERSION "1.0.0")
-
 macro(build_yaml_cpp)
   set(extra_cmake_args)
 
@@ -24,9 +22,7 @@ macro(build_yaml_cpp)
   list(APPEND extra_cmake_args "-DYAML_CPP_BUILD_TESTS=OFF")
   list(APPEND extra_cmake_args "-DYAML_CPP_BUILD_TOOLS=OFF")
   list(APPEND extra_cmake_args "-DYAML_CPP_BUILD_CONTRIB=OFF")
-  list(APPEND extra_cmake_args "-DBUILD_SHARED_LIBS=ON")
-  list(APPEND extra_cmake_args "-DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}")
-  list(APPEND extra_cmake_args "-DCMAKE_C_FLAGS=${CMAKE_C_FLAGS}")
+  list(APPEND extra_cmake_args "-DYAML_BUILD_SHARED_LIBS=ON")
   list(APPEND extra_cmake_args "-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}")
   list(APPEND extra_cmake_args "-DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}")
 
@@ -41,14 +37,9 @@ macro(build_yaml_cpp)
   endif()
 
   include(ExternalProject)
-  # This specific version (past the current latest release of 0.5.3) is required to make
-  # yaml-cpp relocatable, hopefully it is released again soon.
-  # See: https://github.com/jbeder/yaml-cpp/pull/538
-  # Latest release fails to compile on recent visual studio (VS2017 v15.8.1)
-  # See: https://github.com/jbeder/yaml-cpp/pull/597
-  ExternalProject_Add(yaml_cpp-0f9a586
-    URL https://github.com/jbeder/yaml-cpp/archive/0f9a586ca1dc29c2ecb8dd715a315b93e3f40f79.zip
-    URL_MD5 ec76c27ebd07d5178cbe85b773df8e62
+  ExternalProject_Add(yaml_cpp-0.7.0
+    URL https://github.com/jbeder/yaml-cpp/archive/yaml-cpp-0.7.0.tar.gz
+    URL_MD5 74d646a3cc1b5d519829441db96744f0
     TIMEOUT 600
     LOG_CONFIGURE ${should_log}
     LOG_BUILD ${should_log}
@@ -71,7 +62,7 @@ endmacro()
 # NO_CMAKE_PACKAGE_REGISTRY used to avoid finding the library downloaded in WORKSPACE B
 # when building workspace A.
 # This should only find a system installed yaml-cpp and thus the environment hook isn't needed.
-find_package(yaml-cpp 0.6 QUIET NO_CMAKE_PACKAGE_REGISTRY)
+find_package(yaml-cpp QUIET NO_CMAKE_PACKAGE_REGISTRY)
 if(FORCE_BUILD_VENDOR_PKG OR NOT yaml-cpp_FOUND)
   build_yaml_cpp()
 

yaml_cpp_vendor-extras.cmake.in

@@ -5,7 +5,7 @@ if(NOT yaml-cpp_FOUND)
   if(WIN32)
     set(yaml-cpp_DIR "${@PROJECT_NAME@_DIR}/../../../opt/yaml_cpp_vendor/CMake")
   else()
-    set(yaml-cpp_DIR "${@PROJECT_NAME@_DIR}/../../../opt/yaml_cpp_vendor/lib/cmake/yaml-cpp")
+    set(yaml-cpp_DIR "${@PROJECT_NAME@_DIR}/../../../opt/yaml_cpp_vendor/share/cmake/yaml-cpp")
   endif()
   message(STATUS "Setting yaml-cpp_DIR to: '${yaml-cpp_DIR}'")