Merge pull request #33 from RcppCore/bugfix/gcc-7-compilation

fix compilation with gcc 7

Author: kevinushey

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: RcppParallel
 Type: Package
 Title: Parallel Programming Tools for 'Rcpp'
-Version: 4.3.19
+Version: 4.3.20
 Authors@R: c(
     person("JJ", "Allaire", role = c("aut"), email = "jj@rstudio.com"),
     person("Romain", "Francois", role = c("aut", "cph")),

inst/include/tbb/tbb_config.h

@@ -224,7 +224,7 @@
 
 // C++11 standard library features
 
-#define __TBB_CPP11_TYPE_PROPERTIES_PRESENT      (_LIBCPP_VERSION || _MSC_VER >= 1700)
+#define __TBB_CPP11_TYPE_PROPERTIES_PRESENT      (_LIBCPP_VERSION || _MSC_VER >= 1700 || (__TBB_GCC_VERSION >= 50000 && __GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L)
 #define __TBB_TR1_TYPE_PROPERTIES_IN_STD_PRESENT (__GXX_EXPERIMENTAL_CXX0X__ && __TBB_GCC_VERSION >= 40300 || _MSC_VER >= 1600)
 //TODO: Probably more accurate way is to analyze version of stdlibc++ via__GLIBCXX__ instead of __TBB_GCC_VERSION
 #define __TBB_ALLOCATOR_TRAITS_PRESENT           (__cplusplus >= 201103L && _LIBCPP_VERSION  || _MSC_VER >= 1700 ||                                             \

src/tbb/include/tbb/tbb_config.h

@@ -224,7 +224,7 @@
 
 // C++11 standard library features
 
-#define __TBB_CPP11_TYPE_PROPERTIES_PRESENT      (_LIBCPP_VERSION || _MSC_VER >= 1700)
+#define __TBB_CPP11_TYPE_PROPERTIES_PRESENT      (_LIBCPP_VERSION || _MSC_VER >= 1700 || (__TBB_GCC_VERSION >= 50000 && __GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L)
 #define __TBB_TR1_TYPE_PROPERTIES_IN_STD_PRESENT (__GXX_EXPERIMENTAL_CXX0X__ && __TBB_GCC_VERSION >= 40300 || _MSC_VER >= 1600)
 //TODO: Probably more accurate way is to analyze version of stdlibc++ via__GLIBCXX__ instead of __TBB_GCC_VERSION
 #define __TBB_ALLOCATOR_TRAITS_PRESENT           (__cplusplus >= 201103L && _LIBCPP_VERSION  || _MSC_VER >= 1700 ||                                             \