SetSeed implementation

[u/mrichter/AliRoot.git] / Vc / cmake / AddCompilerFlag.cmake

diff --git a/Vc/cmake/AddCompilerFlag.cmake b/Vc/cmake/AddCompilerFlag.cmake
index 75ad694f15467f35fbe42a72a82ddf04ee0da878..f3e5fd0ee7aead107068b38e9da52ddc52db1c2d 100644 (file)
--- a/Vc/cmake/AddCompilerFlag.cmake
+++ b/Vc/cmake/AddCompilerFlag.cmake
@@ -1,24 +1,72 @@
+# - Add a given compiler flag to flags variables.
+# AddCompilerFlag(<flag> [<var>])
+# or
+# AddCompilerFlag(<flag> [C_FLAGS <var>] [CXX_FLAGS <var>] [C_RESULT <var>]
+#                        [CXX_RESULT <var>])
+
+#=============================================================================
+# Copyright 2010-2013 Matthias Kretz <kretz@kde.org>
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#  * Redistributions of source code must retain the above copyright notice,
+#    this list of conditions and the following disclaimer.
+#
+#  * Redistributions in binary form must reproduce the above copyright notice,
+#    this list of conditions and the following disclaimer in the documentation
+#    and/or other materials provided with the distribution.
+#
+#  * The names of Kitware, Inc., the Insight Consortium, or the names of
+#    any consortium members, or of any contributors, may not be used to
+#    endorse or promote products derived from this software without
+#    specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS ``AS IS''
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
+# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#=============================================================================
+
 get_filename_component(_currentDir "${CMAKE_CURRENT_LIST_FILE}" PATH)
 include("${_currentDir}/CheckCCompilerFlag.cmake")
 include("${_currentDir}/CheckCXXCompilerFlag.cmake")
+
 macro(AddCompilerFlag _flag)
    string(REGEX REPLACE "[-.+/:= ]" "_" _flag_esc "${_flag}")
-   check_c_compiler_flag("${_flag}" check_c_compiler_flag_${_flag_esc})
-   check_cxx_compiler_flag("${_flag}" check_cxx_compiler_flag_${_flag_esc})
 
    set(_c_flags "CMAKE_C_FLAGS")
    set(_cxx_flags "CMAKE_CXX_FLAGS")
+   set(_c_result tmp)
+   set(_cxx_result tmp)
    if(${ARGC} EQUAL 2)
-      set(${ARGV1} "${check_cxx_compiler_flag_${_flag_esc}}")
+      message(WARNING "Deprecated use of the AddCompilerFlag macro.")
+      unset(_c_result)
+      set(_cxx_result ${ARGV1})
    elseif(${ARGC} GREATER 2)
       set(state 0)
       unset(_c_flags)
       unset(_cxx_flags)
+      unset(_c_result)
+      unset(_cxx_result)
       foreach(_arg ${ARGN})
          if(_arg STREQUAL "C_FLAGS")
             set(state 1)
+            if(NOT DEFINED _c_result)
+               set(_c_result tmp)
+            endif()
          elseif(_arg STREQUAL "CXX_FLAGS")
             set(state 2)
+            if(NOT DEFINED _cxx_result)
+               set(_cxx_result tmp)
+            endif()
          elseif(_arg STREQUAL "C_RESULT")
             set(state 3)
          elseif(_arg STREQUAL "CXX_RESULT")
@@ -28,15 +76,39 @@ macro(AddCompilerFlag _flag)
          elseif(state EQUAL 2)
             set(_cxx_flags "${_arg}")
          elseif(state EQUAL 3)
-            set(${_arg} ${check_c_compiler_flag_${_flag_esc}})
+            set(_c_result "${_arg}")
          elseif(state EQUAL 4)
-            set(${_arg} ${check_cxx_compiler_flag_${_flag_esc}})
+            set(_cxx_result "${_arg}")
          else()
             message(FATAL_ERROR "Syntax error for AddCompilerFlag")
          endif()
       endforeach()
    endif()
 
+   if("${_flag}" STREQUAL "-mfma")
+      # Compiling with FMA3 support may fail only at the assembler level.
+      # In that case we need to have such an instruction in the test code
+      set(_code "#include <immintrin.h>
+      __m128 foo(__m128 x) { return _mm_fmadd_ps(x, x, x); }
+      int main() { return 0; }")
+   elseif("${_flag}" STREQUAL "-stdlib=libc++")
+      # Compiling with libc++ not only requires a compiler that understands it, but also
+      # the libc++ headers itself
+      set(_code "#include <iostream>
+      int main() { return 0; }")
+   else()
+      set(_code "int main() { return 0; }")
+   endif()
+
+   if(DEFINED _c_result)
+      check_c_compiler_flag("${_flag}" check_c_compiler_flag_${_flag_esc} "${_code}")
+      set(${_c_result} ${check_c_compiler_flag_${_flag_esc}})
+   endif()
+   if(DEFINED _cxx_result)
+      check_cxx_compiler_flag("${_flag}" check_cxx_compiler_flag_${_flag_esc} "${_code}")
+      set(${_cxx_result} ${check_cxx_compiler_flag_${_flag_esc}})
+   endif()
+
    if(check_c_compiler_flag_${_flag_esc} AND DEFINED _c_flags)
       set(${_c_flags} "${${_c_flags}} ${_flag}")
    endif()