cmake: bump the required Boost version to 1.73

because ssl::host_name_verification was introduced in Asio 1.16.1 / Boost 1.73, and we
are using this class in src/librbd/migration/HttpClient.cc

This is an known error with Boost:
    https://cplusplus.github.io/LWG/issue3171

without this change, on a host with boost 1.72
it will complain (on FreeBSD/Clang):
```

/home/jenkins/workspace/ceph-master-compile/src/librbd/migration/HttpClient.cc:699:37: error: no member named 'host_name_verification' in namespace 'boost::asio::ssl'
      [host, next=boost::asio::ssl::host_name_verification(host),
                  ~~~~~~~~~~~~~~~~~~^
/home/jenkins/workspace/ceph-master-compile/src/librbd/migration/HttpClient.cc:714:16: error: no matching function for call to 'next'
        return next(preverified, ctx);
               ^~~~
```

Signed-off-by: Willem Jan Withagen <wjw@digiware.nl>

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d571b4b8d3a7d8c1e8ce19a13b116ea19eaa2cfe..84c12ae35143240f584d7095b169b33a550dd9dd 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -627,7 +627,7 @@ if(WITH_SYSTEM_BOOST)
   if(BOOST_ROOT AND CMAKE_LIBRARY_ARCHITECTURE)
     set(BOOST_LIBRARYDIR "${BOOST_ROOT}/lib/${CMAKE_LIBRARY_ARCHITECTURE}")
   endif()
-  find_package(Boost 1.72 COMPONENTS ${BOOST_COMPONENTS} REQUIRED)
+  find_package(Boost 1.73 COMPONENTS ${BOOST_COMPONENTS} REQUIRED)
   if(NOT ENABLE_SHARED)
     set_property(TARGET Boost::iostreams APPEND PROPERTY
       INTERFACE_LINK_LIBRARIES ZLIB::ZLIB)
@@ -637,7 +637,7 @@ else()
     "max jobs for Boost build") # override w/-DBOOST_J=<n>
   set(Boost_USE_STATIC_LIBS ON)
   include(BuildBoost)
-  build_boost(1.72
+  build_boost(1.73
     COMPONENTS ${BOOST_COMPONENTS} ${BOOST_HEADER_COMPONENTS})
 endif()
 include_directories(BEFORE SYSTEM ${Boost_INCLUDE_DIRS})