reorder deprecation feature check

This moves the check of compiler features after the std standard
detection and checks that the checks compile with the correct flags to
be used later without warnings.

diff --git a/cmake/checks/check_01_compiler_features.cmake b/cmake/checks/check_02_compiler_features.cmake
similarity index 96%
rename from cmake/checks/check_01_compiler_features.cmake
rename to cmake/checks/check_02_compiler_features.cmake
index e28afe5a70fcd4ce8fe85cf1145dba5dae9b94eb..9b25606212479729410a2b8ead30a4d8f050c318 100644 (file)
--- a/cmake/checks/check_01_compiler_features.cmake
+++ b/cmake/checks/check_02_compiler_features.cmake
@@ -315,6 +315,15 @@ ENDIF()
 # - Wolfgang Bangerth, 2012
 #
 
+# some compilers compile the attributes but they do not work:
+# "warning: use of the 'deprecated' attribute is a C++14 extension" (clang in c++11 mode)
+# "warning #1292: unknown attribute "deprecated"" (icc)
+PUSH_CMAKE_REQUIRED("${DEAL_II_CXX_FLAGS}")
+PUSH_CMAKE_REQUIRED("-Werror")
+PUSH_CMAKE_REQUIRED("-Wno-deprecated-declarations")
+PUSH_CMAKE_REQUIRED("-Wno-deprecated")
+PUSH_CMAKE_REQUIRED("-Wno-unused-command-line-argument")
+
 # first see if the compiler accepts the attribute
 CHECK_CXX_SOURCE_COMPILES(
   "
@@ -350,6 +359,8 @@ CHECK_CXX_SOURCE_COMPILES(
   DEAL_II_COMPILER_HAS_ATTRIBUTE_DEPRECATED
   )
 
+RESET_CMAKE_REQUIRED()
+
 IF(DEAL_II_COMPILER_HAS_CXX14_ATTRIBUTE_DEPRECATED)
   SET(DEAL_II_DEPRECATED "[[deprecated]]")
 ELSEIF(DEAL_II_COMPILER_HAS_ATTRIBUTE_DEPRECATED)