diff --git a/include/bx/macros.h b/include/bx/macros.h
index 7a9b643..1509925 100644
--- a/include/bx/macros.h
+++ b/include/bx/macros.h
@@ -115,7 +115,7 @@
 
 /// The return value of the function is solely a function of the arguments.
 ///
-#if BX_COMPILER_MSVC && (BX_COMPILER_MSVC <= 1900)
+#if (BX_COMPILER_MSVC && (BX_COMPILER_MSVC <= 1900)) || (BX_COMPILER_GCC && (__cplusplus < 201402L))
 #	define BX_CONSTEXPR_FUNC BX_CONST_FUNC
 #else
 #	define BX_CONSTEXPR_FUNC constexpr BX_CONST_FUNC
diff --git a/tools/bin/darwin/bin2c b/tools/bin/darwin/bin2c
index cb1acca..7aa45d0 100755
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diff --git a/tools/bin/darwin/lemon b/tools/bin/darwin/lemon
index f8cfceb..c00a276 100755
Binary files a/tools/bin/darwin/lemon and b/tools/bin/darwin/lemon differ
diff --git a/tools/bin/windows/bin2c.exe b/tools/bin/windows/bin2c.exe
index 2c01cdd..d93eff1 100755
Binary files a/tools/bin/windows/bin2c.exe and b/tools/bin/windows/bin2c.exe differ
diff --git a/tools/bin/windows/lemon.exe b/tools/bin/windows/lemon.exe
index 5de0c8d..ea46fec 100644
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