Configure: Add easy to use disabled deprecated functionality indicators

In C, we have macros like OPENSSL_NO_DEPRECATED_3_0 to check if some
section of code should be disabled to simulate a removal of things
deprecated in the version.

In perl, we had to check $disabled{deprecated} and compare
$config{api} with the proper version code, which is doable but tedious
and error prone.

This change adds $disabled{'deprecated-x.y'} (x.y being a version
number) which directly corresponds to OPENSSL_NO_DEPRECATED_x_y, for
use in build.info conditions, test recipes and other perl stuff.

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/11027)

diff --git a/Configure b/Configure
index 696f15ab0f915f4cd8f2f3e5e2622bba4426581b..2dd0520d3da577680ecafcc95a458f80292d6a09 100755 (executable)
--- a/Configure
+++ b/Configure
@@ -561,8 +561,7 @@ my @disable_cascades = (
     "cmp"               => [ "crmf" ],
 
     # Padlock engine uses low-level AES APIs which are deprecated
-    sub { $disabled{"deprecated"}
-          && (!defined $config{"api"} || $config{"api"} >= 30000) }
+    sub { $disabled{"deprecated-3.0"} }
           => [ "padlockeng" ]
     );
 
@@ -1477,6 +1476,12 @@ die "Exactly one of SIXTY_FOUR_BIT|SIXTY_FOUR_BIT_LONG|THIRTY_TWO_BIT can be set
 
 $config{api} = $config{major} * 10000 + $config{minor} * 100
     unless $config{api};
+foreach (keys %$apitable) {
+    $disabled{"deprecated-$_"} = "deprecation"
+        if $disabled{deprecated} && $config{api} >= $apitable->{$_};
+}
+
+disable();                      # Run a cascade now
 
 # Hack cflags for better warnings (dev option) #######################
 
@@ -1488,7 +1493,7 @@ $config{cxxflags} = [ map { (my $x = $_) =~ s/([\\\"])/\\$1/g; $x }
                           @{$config{cxxflags}} ] if $config{CXX};
 
 $config{openssl_api_defines} = [
-    "OPENSSL_CONFIGURED_API=".$config{api}
+    "OPENSSL_CONFIGURED_API=".$config{api},
 ];
 
 my @strict_warnings_collection=();
@@ -1647,6 +1652,9 @@ foreach my $what (sort keys %disabled) {
     # There are deprecated disablables that translate to themselves.
     # They cause disabling cascades, but should otherwise not regiter.
     next if $deprecated_disablables{$what};
+    # The generated $disabled{"deprecated-x.y"} entries are special
+    # and treated properly elsewhere
+    next if $what =~ m|^deprecated-|;
 
     $config{options} .= " no-$what";