check for c++ version >= 11 when CMAKE_CXX_STANDARD is provided from outside

5 years ago · 6bef561099
parent 27cb5609e5
commit 6bef561099
2 changed files with 8 additions and 0 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -160,6 +160,10 @@ endif()
 # Add c++11 flags
 if (NOT DEFINED CMAKE_CXX_STANDARD)
  set(CMAKE_CXX_STANDARD 11)
+else()
+  if (CMAKE_CSS_STANDARD LESS 11)
+    message(FATAL at least C++11 support is required)
+  endif()
 endif()
 if (NOT DEFINED CMAKE_CXX_STANDARD_REQUIRED)
  set(CMAKE_CXX_STANDARD_REQUIRED ON)
--- a/templates/CMakeLists.txt.template
+++ b/templates/CMakeLists.txt.template
@ -250,6 +250,10 @@
  # Add c++11 flags
  if (NOT DEFINED CMAKE_CXX_STANDARD)
    set(CMAKE_CXX_STANDARD 11)
+  else()
+    if (CMAKE_CSS_STANDARD LESS 11)
+      message(FATAL at least C++11 support is required)
+    endif()
  endif()
  if (NOT DEFINED CMAKE_CXX_STANDARD_REQUIRED)
    set(CMAKE_CXX_STANDARD_REQUIRED ON)