+/* If at all possible, fix the source rather than using these macros
+ to silence warnings. If you do use these macros be aware that
+ you'll need to condition their use on particular compiler versions,
+ which can be done for gcc using ansidecl.h's GCC_VERSION macro.
+
+ gcc versions between 4.2 and 4.6 do not allow pragma control of
+ diagnostics inside functions, giving a hard error if you try to use
+ the finer control available with later versions.
+ gcc prior to 4.2 warns about diagnostic push and pop.
+
+ The other macros have restrictions too, for example gcc-5, gcc-6
+ and gcc-7 warn that -Wstringop-truncation is unknown, unless you
+ also add DIAGNOSTIC_IGNORE ("-Wpragma"). */
+