Added a warning message to remind users to enable C++11 support.

8061c31a · Davis King · a6dd7d82 · 8061c31a
Commit 8061c31a authored Sep 06, 2016 by Davis King
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algs.h dlib/algs.h +8 -0

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--- a/dlib/algs.h
+++ b/dlib/algs.h
@@ -10,6 +10,14 @@

 // this file contains miscellaneous stuff                      

+// Give people who forget the -std=c++11 option a reminder
+#if (defined(__GNUC__) && ((__GNUC__ >= 4 && __GNUC_MINOR__ >= 8) || (__GNUC__ > 4))) || \
+    (defined(__clang__) && ((__clang_major__ >= 3 && __clang_minor__ >= 4) || (__clang_major__ >= 3)))
+    #if __cplusplus < 201103
+        #error "Dlib requires C++11 support.  Give your compiler the -std=c++11 option to enable it."
+    #endif
+#endif
+

 #ifdef _MSC_VER