wip precompiled headers cmake support

1 files changed, 26 insertions, 2 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 04986976..81f9fa75 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,10 +13,34 @@ set(PROJECT_NAMESPACE boost::)
 
 # Update this header file with the current git SHA and last timestamp
 UpdateRevisionHppFromGit("${CMAKE_CURRENT_SOURCE_DIR}/include/boost/afio/revision.hpp")
+# Make an interface only library so dependent CMakeLists can bring in this header-only library
+include(BoostLiteMakeHeaderOnlyLibrary)
+# Anyone using the static or dynamic libraries is not using the header only variant
+set(afio_NON_HEADER_ONLY_COMPILE_DEFINITIONS INTERFACE BOOST_AFIO_HEADERS_ONLY=0) 
 # Make the standard static and shared libraries, and if supported by this compiler, C++ modules
 # for both static and shared libraries as well. For the non-C++ module variants, makes the
 # interface headers into precompiled headers. Only builds all of them if this is the topmost
 # CMakeLists, else built only if something upstream is dependent on one of them.
 include(BoostLiteMakeLibrary)
-# Make an interface only library so dependent CMakeLists can bring in this header-only library
-include(BoostLiteMakeHeaderOnlyLibrary)
+
+# Set the C++ features this library requires
+foreach(lib afio_sl afio_dl)
+  if(${lib} STREQUAL afio_hl)
+    set(PUBLIC INTERFACE)
+  else()
+    set(PUBLIC PUBLIC)
+  endif()
+  target_compile_features(${lib} ${PUBLIC}
+    # cxx_exceptions                        ## Annoyingly not supported by cmake 3.4
+    cxx_alias_templates
+    cxx_variadic_templates
+    cxx_noexcept
+    cxx_constexpr
+    cxx_thread_local
+    #cxx_init_captures                      ## Not supported yet by cmake 3.4
+    cxx_attributes
+    cxx_variable_templates
+  )
+  unset(PUBLIC)
+endforeach()
+