[buildsystem] Check for std::thread.

cmake/modules/FindCXX11Features.cmake

@@ -14,6 +14,7 @@
 # HAVE_VARIADIC_TEMPLATES          True if variadic templates are supprt
 # HAVE_VARIADIC_CONSTRUCTOR_SFINAE True if variadic constructor sfinae is supported
 # HAVE_RVALUE_REFERENCES           True if rvalue references are supported
+# HAVE_STD_THREAD                  True if std::thread is supported
 
 include(CMakePushCheckState)
 cmake_push_check_state()
@@ -311,4 +312,21 @@ CHECK_CXX_SOURCE_COMPILES("
 " HAVE_INITIALIZER_LIST
 )
 
+# std::thread
+CHECK_CXX_SOURCE_COMPILES("
+  #include <thread>
+
+  void f()
+  {
+    // do nothing
+  }
+
+  int main()
+  {
+    std::thread t(f);
+    t.join();
+  }
+" HAVE_STD_THREAD
+)
+
 cmake_pop_check_state()

m4/CMakeLists.txt

@@ -27,6 +27,7 @@ install(PROGRAMS
         dune_docu.m4
         dune_linkcxx.m4
         dune_mpi.m4
+        dune_std_thread.m4
         dune_streams.m4
         dune_tr1_headers.m4
         dune_unused.m4

m4/Makefile.am

@@ -31,6 +31,7 @@ ALLM4S = 					\
 	dune_docu.m4				\
 	dune_linkcxx.m4				\
 	dune_mpi.m4				\
+        dune_std_thread.m4			\
 	dune_streams.m4				\
 	dune_tr1_headers.m4			\
 	dune_unused.m4			        \

m4/dune_std_thread.m4

+# tests for C++11 class std::thread
+# the associated macro is called HAVE_STD_THREAD
+# the automake conditional is STD_THREAD
+
+AC_DEFUN([DUNE_STD_THREAD],[
+  AC_REQUIRE([GXX0X])
+  AC_CACHE_CHECK([whether std::thread is supported], [dune_cv_std_thread_supported], [
+    AC_LANG_PUSH([C++])
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([[
+        #include <thread>
+
+        void f()
+        {
+          // do nothing
+        }
+        ]],
+        [[
+          std::thread t(f);
+          t.join();
+        ]])],
+      [dune_cv_std_thread_supported=yes],
+      [dune_cv_std_thread_supported=no])
+    AC_LANG_POP([C++])
+  ])
+  if test "x$dune_cv_std_thread_supported" = xyes; then
+    AC_DEFINE([HAVE_STD_THREAD], [1], [Define to 1 if std::thread is supported])
+  fi
+  AM_CONDITIONAL([STD_THREAD], [test "x$dune_cv_std_thread_supported" = xyes])
+])