Add -Wundef to --strict-warnings options.

Avoid a -Wundef warning in refcount.h
Avoid a -Wundef warning in o_str.c
Avoid a -Wundef warning in testutil.h
Include internal/cryptlib.h before openssl/stack.h
to avoid use of undefined symbol OPENSSL_API_COMPAT.

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2712)

1 files changed, 2 insertions, 0 deletions

diff --git a/Configure b/Configure
index e24980ac8f..4404963aa7 100755
--- a/Configure
+++ b/Configure
@@ -124,6 +124,7 @@ my $gcc_devteam_warn = "-DDEBUG_UNUSED"
         . " -Wshadow"
         . " -Wformat"
         . " -Wtype-limits"
+        . " -Wundef"
         . " -Werror"
         ;
 
@@ -147,6 +148,7 @@ my $clang_devteam_warn = ""
         . " -Wconditional-uninitialized"
         . " -Wincompatible-pointer-types-discards-qualifiers"
         . " -Wmissing-variable-declarations"
+        . " -Wundef"
         ;
 
 # This adds backtrace information to the memory leak info.  Is only used