From 26ef684c7e49f3614d43f9f086cb3dc3fad15dfa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christoph=20Gr=C3=BCninger?= <gruenich@dune-project.org>
Date: Fri, 21 Mar 2014 16:49:26 +0100
Subject: [PATCH] [CMake] Add check for HAVE_CONSTEXPR.
---
cmake/modules/CheckCXX11Features.cmake | 18 ++++++++++++++++++
config.h.cmake | 3 +++
2 files changed, 21 insertions(+)
diff --git a/cmake/modules/CheckCXX11Features.cmake b/cmake/modules/CheckCXX11Features.cmake
index 7a564304c..7ddaf3021 100644
--- a/cmake/modules/CheckCXX11Features.cmake
+++ b/cmake/modules/CheckCXX11Features.cmake
@@ -324,4 +324,22 @@ check_cxx_source_compiles("
" HAVE_INITIALIZER_LIST
)
+# constexpr
+check_cxx_source_compiles("
+ constexpr int foo()
+ { return 0; }
+
+ template<int v>
+ struct A
+ {
+ static const int value = v;
+ };
+
+ int main(void)
+ {
+ return A<foo()>::value;
+ }
+" HAVE_CONSTEXPR
+)
+
cmake_pop_check_state()
diff --git a/config.h.cmake b/config.h.cmake
index 7e1d86719..6972a7da4 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -160,6 +160,9 @@
/* Define to 1 if initializer list is supported */
#cmakedefine HAVE_INITIALIZER_LIST 1
+/* Define to 1 if C++11 constexpr is supported */
+#cmakedefine HAVE_CONSTEXPR 1
+
/* Define to if the UMFPack library is available */
#cmakedefine HAVE_UMFPACK ENABLE_UMFPACK
--
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