From 134b729e4601632b1316bb9dfb4d4cfc71bb59f8 Mon Sep 17 00:00:00 2001
From: Kaveh Vahedipour <kaveh@arangodb.com>
Date: Fri, 12 Feb 2016 12:25:19 +0100
Subject: [PATCH] Missing files for CPU flags checking

---
 cmake/CheckCCompilerFlag.cmake | 64 ++++++++++++++++++++++++++++++++++
 cmake/UserWarning.cmake        |  9 +++++
 2 files changed, 73 insertions(+)
 create mode 100644 cmake/CheckCCompilerFlag.cmake
 create mode 100644 cmake/UserWarning.cmake

diff --git a/cmake/CheckCCompilerFlag.cmake b/cmake/CheckCCompilerFlag.cmake
new file mode 100644
index 0000000000..53f3454734
--- /dev/null
+++ b/cmake/CheckCCompilerFlag.cmake
@@ -0,0 +1,64 @@
+#.rst:
+# CheckCCompilerFlag
+# ------------------
+#
+# Check whether the C compiler supports a given flag.
+#
+# CHECK_C_COMPILER_FLAG(<flag> <var>)
+#
+# ::
+#
+#   <flag> - the compiler flag
+#   <var>  - variable to store the result
+#            Will be created as an internal cache variable.
+#
+# This internally calls the check_c_source_compiles macro and sets
+# CMAKE_REQUIRED_DEFINITIONS to <flag>.  See help for
+# CheckCSourceCompiles for a listing of variables that can otherwise
+# modify the build.  The result only tells that the compiler does not
+# give an error message when it encounters the flag.  If the flag has
+# any effect or even a specific one is beyond the scope of this module.
+
+#=============================================================================
+# Copyright 2006-2011 Kitware, Inc.
+# Copyright 2006 Alexander Neundorf <neundorf@kde.org>
+# Copyright 2011 Matthias Kretz <kretz@kde.org>
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+include(CheckCSourceCompiles)
+include(CMakeCheckCompilerFlagCommonPatterns)
+
+macro (CHECK_C_COMPILER_FLAG _FLAG _RESULT)
+   set(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}")
+   set(CMAKE_REQUIRED_DEFINITIONS "${_FLAG}")
+
+   # Normalize locale during test compilation.
+   set(_CheckCCompilerFlag_LOCALE_VARS LC_ALL LC_MESSAGES LANG)
+   foreach(v ${_CheckCCompilerFlag_LOCALE_VARS})
+     set(_CheckCCompilerFlag_SAVED_${v} "$ENV{${v}}")
+     set(ENV{${v}} C)
+   endforeach()
+   CHECK_COMPILER_FLAG_COMMON_PATTERNS(_CheckCCompilerFlag_COMMON_PATTERNS)
+   CHECK_C_SOURCE_COMPILES("int main(void) { return 0; }" ${_RESULT}
+     # Some compilers do not fail with a bad flag
+     FAIL_REGEX "command line option .* is valid for .* but not for C" # GNU
+     ${_CheckCCompilerFlag_COMMON_PATTERNS}
+     )
+   foreach(v ${_CheckCCompilerFlag_LOCALE_VARS})
+     set(ENV{${v}} ${_CheckCCompilerFlag_SAVED_${v}})
+     unset(_CheckCCompilerFlag_SAVED_${v})
+   endforeach()
+   unset(_CheckCCompilerFlag_LOCALE_VARS)
+   unset(_CheckCCompilerFlag_COMMON_PATTERNS)
+
+   set (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}")
+endmacro ()
diff --git a/cmake/UserWarning.cmake b/cmake/UserWarning.cmake
new file mode 100644
index 0000000000..0be6ad240d
--- /dev/null
+++ b/cmake/UserWarning.cmake
@@ -0,0 +1,9 @@
+macro(UserWarning _msg)
+   if("$ENV{DASHBOARD_TEST_FROM_CTEST}" STREQUAL "")
+      # developer (non-dashboard) build
+      message(WARNING "${_msg}")
+   else()
+      # dashboard build
+      message(STATUS "${_msg}")
+   endif()
+endmacro()