VMS: tell the C compiler to use the ISO C94 standard

The current version of the VMS compiler provides C99 features,
strictly language wise.  Unfortunately, even the most recent standard
library isn't fully updated for that standard, so we need to use an
earlier standard that the compiler supports.

Most importantly, this affects the __STDC_VERSION__ value, which the
compiler unfortunately currently defaults to 199901L.  With this
change we won't have to give VMS special treatment when looking for
features based on that macro.

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1785)
(cherry picked from commit 4f3015bb30b7d95bb97408776b70e6a35fb91e8a)

diff --git a/Configurations/10-main.conf b/Configurations/10-main.conf
index d7f3b074c30aa89ce92d5902fe3b624ad7450fb9..287f554d82923ee166e08e9ca81692dc0f6f85e3 100644 (file)
--- a/Configurations/10-main.conf
+++ b/Configurations/10-main.conf
@@ -1742,7 +1742,7 @@ sub vms_info {
         inherit_from     => [ "BASE_VMS" ],
         template         => 1,
         cc               => "CC/DECC",
-        cflags           => picker(default => "/STANDARD=RELAXED/NOLIST/PREFIX=ALL",
+        cflags           => picker(default => "/STANDARD=(ISOC94,RELAXED)/NOLIST/PREFIX=ALL",
                                    debug   => "/NOOPTIMIZE/DEBUG",
                                    release => "/OPTIMIZE/NODEBUG"),
         lflags           => picker(default => "/MAP",