boost: ignore warnings

Projects/apple/boost.cmake

@@ -25,6 +25,8 @@ add_external_project(boost
   BUILD_COMMAND ./b2 ${boost_toolset} address-model=${am} linkflags="-headerpad_max_install_names" --build-dir=${boost_build_dir} ${boost_with_args}
   INSTALL_COMMAND ./b2 ${boost_toolset} address-model=${am} linkflags="-headerpad_max_install_names" ${boost_with_args} install --prefix=${boost_install_dir}
   BUILD_IN_SOURCE 1
+
+  LOG_BUILD 1
   )
 
 add_extra_cmake_args(

Projects/unix/boost.cmake

@@ -25,6 +25,8 @@ add_external_project(boost
   BUILD_COMMAND ./b2 ${boost_toolset} --build-dir=${boost_build_dir} address-model=${am} dll-path=${install_location}/lib ${boost_with_args}
   INSTALL_COMMAND ./b2 ${boost_toolset} address-model=${am} ${boost_with_args} dll-path=${install_location}/lib install
   BUILD_IN_SOURCE 1
+
+  LOG_BUILD 1
   )
 
 add_extra_cmake_args(

Projects/win32/boost.cmake

@@ -35,6 +35,8 @@ if(MSVC)
     BUILD_COMMAND b2 --build-dir=${boost_build_dir} toolset=${msvc_version} address-model=${am} ${boost_with_args}
     INSTALL_COMMAND b2 toolset=${msvc_version} address-model=${am} ${boost_with_args} --prefix=${install_location} install
     BUILD_IN_SOURCE 1
+
+    LOG_BUILD 1
     )
 else()
   #ninja / mingw has been launched from a shell with the toolset properly specified
@@ -44,6 +46,8 @@ else()
     BUILD_COMMAND b2 --build-dir=${boost_build_dir} address-model=${am} ${boost_with_args}
     INSTALL_COMMAND b2 address-model=${am} ${boost_with_args} --prefix=${install_location} install
     BUILD_IN_SOURCE 1
+
+    LOG_BUILD 1
     )
 endif()