take into account the new compile features option

Author: compor

cmake/LLVMIRUtil.cmake

@@ -56,6 +56,9 @@ function(llvmir_attach_bc_target OUT_TRGT IN_TRGT)
   # includes
   llvmir_extract_include_dirs_properties(IN_INCLUDES ${IN_TRGT})
 
+  # language standards flags
+  llvmir_extract_standard_flags(IN_STANDARD_FLAGS ${IN_TRGT})
+
   # compile options
   llvmir_extract_compile_option_properties(IN_COMPILE_OPTIONS ${IN_TRGT})
 
@@ -86,8 +89,9 @@ function(llvmir_attach_bc_target OUT_TRGT IN_TRGT)
     debug("@llvmir_attach_bc_target ${IN_TRGT} compile flags: \
       ${CURRENT_COMPILE_FLAGS}")
 
-    set(CMD_ARGS "-emit-llvm" ${IN_LANG_FLAGS} ${IN_COMPILE_OPTIONS}
-      ${CURRENT_COMPILE_FLAGS} ${CURRENT_DEFS} ${IN_INCLUDES})
+      set(CMD_ARGS "-emit-llvm" ${IN_STANDARD_FLAGS} ${IN_LANG_FLAGS}
+        ${IN_COMPILE_OPTIONS} ${CURRENT_COMPILE_FLAGS} ${CURRENT_DEFS}
+        ${IN_INCLUDES})
 
     add_custom_command(OUTPUT ${FULL_OUT_LLVMIR_FILE}
       COMMAND ${LLVMIR_COMPILER}

cmake/LLVMIRUtilInternal.cmake

@@ -244,6 +244,49 @@ function(llvmir_extract_lang_flags out_lang_flags lang)
 endfunction()
 
 
+function(llvmir_extract_standard_flags out_standard_flags trgt)
+  set(standard_flags "")
+
+  get_property(std TARGET ${trgt} PROPERTY C_STANDARD)
+  get_property(req TARGET ${trgt} PROPERTY C_EXTENSIONS)
+
+  if(std)
+    if(req)
+      set(cflag "gnu")
+    else()
+      set(cflag "std")
+    endif()
+
+    set(cflag "${flag}c${std}")
+  endif()
+
+  get_property(std TARGET ${trgt} PROPERTY CXX_STANDARD)
+  get_property(req TARGET ${trgt} PROPERTY CXX_EXTENSIONS)
+
+  if(std)
+    if(req)
+      set(cxxflag "gnu")
+    else()
+      set(cxxflag "std")
+    endif()
+
+    set(cxxflag "${flag}c++${std}")
+  endif()
+
+  if(cflag)
+    set(standard_flags "-std=${cflag}")
+  endif()
+
+  if(cxxflag)
+    set(standard_flags "-std=${cxxflag}")
+  endif()
+
+  debug("@llvmir_extract_standard_flags ${lang}: ${standard_flags}")
+
+  set(${out_standard_flags} ${standard_flags} PARENT_SCOPE)
+endfunction()
+
+
 function(llvmir_extract_compile_flags out_compile_flags from)
   #message(DEPRECATION "COMPILE_FLAGS property is deprecated.")