(PA-6549) Fix warning:undefining the allocator of T_DATA class for RHEL7

This commit adds a patch that patches selinux_ruby_wrap.c in RHEL 7 and RHEL
FIPS 7 to fix the warning: undefining the allocator of T_DATA class
SWIG::TYPE_p_selabel_handle. These platforms cannot use the original patch
(even with increased fuzz values),
selinuxswig_ruby_undefining_allocator.patch, that fixed the warning for other
platforms. RHEL 7 and RHEL FIPS 7 use an older version of swig and due to
that, have an older version of selinux_ruby_wrap.c.

Author: AriaXLi

configs/components/_base-ruby-selinux.rb

@@ -5,6 +5,7 @@
 
 pkg.add_source("file://resources/patches/ruby-selinux/selinuxswig_ruby_wrap.patch")
 pkg.add_source("file://resources/patches/ruby-selinux/selinuxswig_ruby_undefining_allocator.patch")
+pkg.add_source("file://resources/patches/ruby-selinux/undefining_allocator_el_7.patch")
 
 # These can be overridden by the including component.
 ruby_version ||= settings[:ruby_version]
@@ -82,7 +83,17 @@
     unless platform.name =~ /^(debian-12|ubuntu-24|fedora-40)/
       steps << "#{platform.patch} --strip=0 --fuzz=0 --ignore-whitespace --no-backup-if-mismatch < ../selinuxswig_ruby_wrap.patch"
     end
-    steps << "#{platform.patch} --strip=0 --fuzz=0 --ignore-whitespace --no-backup-if-mismatch < ../selinuxswig_ruby_undefining_allocator.patch"
+    # EL 7 uses an older version of swig (2.0) so a different patch is needed to
+    # fix warning:undefining the allocator of T_DATA class
+    if platform.name =~ /el-7|redhatfips-7/
+      steps << "#{platform.patch} --strip=0 --fuzz=0 --ignore-whitespace --no-backup-if-mismatch < ../undefining_allocator_el_7.patch"
+    else
+      # Ubuntu 24 & Fedora 40 use a newer swig that already has the fix that's
+      # being patched
+      unless platform.name =~ /^(ubuntu-24|fedora-40)/
+        steps << "#{platform.patch} --strip=0 --fuzz=0 --ignore-whitespace --no-backup-if-mismatch < ../selinuxswig_ruby_undefining_allocator.patch"
+      end
+    end
   end
 
   # libselinux 3.3 is the minimum version we want to build on RHEL 9, but the

resources/patches/ruby-selinux/undefining_allocator_el_7.patch

@@ -0,0 +1,10 @@
+--- selinuxswig_ruby_wrap_orig.c	2024-06-14 18:03:11.946019756 +0000
++++ selinuxswig_ruby_wrap.c	2024-06-14 18:08:23.057169863 +0000
+@@ -1486,7 +1486,7 @@
+     _cSWIG_Pointer = rb_define_class_under(_mSWIG, "Pointer", rb_cObject);
+     rb_undef_method(CLASS_OF(_cSWIG_Pointer), "new");
+   }
+-  klass = rb_define_class_under(_mSWIG, klass_name, _cSWIG_Pointer);
++  rb_undef_alloc_func(rb_define_class_under(_mSWIG, klass_name, _cSWIG_Pointer));
+   free((void *) klass_name);
+ }