(PA-4867) Only override rbconfig when cross compiling

The ruby-augeas gem's native extensions didn't work, because we were overriding
rbconfig when native compiling. It is only necessary to do that when cross
compiling, because the host ruby running on Solaris Intel needs to override CC,
etc configuration when installing gems with native extensions.

The ruby-shadow gem did work on SPARC, but it was relying on the rbconfig
overrides to find gcc. Instead add pl-build-tools to the PATH and only override
rbconfig when cross compiling.

configs/components/_base-ruby-augeas.rb

@@ -36,10 +36,16 @@
 pkg.environment "PKG_CONFIG_PATH", "#{File.join(settings[:libdir], 'pkgconfig')}:/usr/lib/pkgconfig"
 
 if platform.is_solaris?
-  if platform.architecture == 'sparc'
+  if platform.is_cross_compiled?
     pkg.environment "RUBY", host_ruby
   end
-  ruby = "#{host_ruby} -r#{settings[:datadir]}/doc/rbconfig-#{ruby_version}-orig.rb"
+
+  if platform.is_cross_compiled? || platform.architecture != 'sparc'
+    # This should really only be done when cross compiling but
+    # to avoid breaking solaris x86_64 in 7.x, only skip this
+    # when native compiling on sparc
+    ruby = "#{host_ruby} -r#{settings[:datadir]}/doc/rbconfig-#{ruby_version}-orig.rb"
+  end
 elsif platform.is_cross_compiled?
   if platform.is_linux? || platform.is_macos?
     pkg.environment "RUBY", host_ruby

configs/components/ruby-shadow.rb

@@ -3,22 +3,33 @@
   pkg.ref "refs/tags/2.5.0"
 
   pkg.build_requires "ruby-#{settings[:ruby_version]}"
-  pkg.environment "PATH", "$(PATH):/usr/ccs/bin:/usr/sfw/bin"
+  if !platform.is_cross_compiled? && platform.architecture == 'sparc'
+    pkg.environment "PATH", "$(PATH):/opt/pl-build-tools/bin:/usr/ccs/bin:/usr/sfw/bin"
+  else
+    pkg.environment "PATH", "$(PATH):/usr/ccs/bin:/usr/sfw/bin"
+  end
+
   pkg.environment "CONFIGURE_ARGS", '--vendor'
 
   if platform.is_solaris?
-    if platform.architecture == 'sparc'
+    if platform.is_cross_compiled?
       pkg.environment "RUBY", settings[:host_ruby]
     end
-    ruby = "#{settings[:host_ruby]} -r#{settings[:datadir]}/doc/rbconfig-#{settings[:ruby_version]}-orig.rb"
+
+    if platform.is_cross_compiled? || platform.architecture != 'sparc'
+      # This should really only be done when cross compiling but
+      # to avoid breaking solaris x86_64 in 7.x, only skip this
+      # when native compiling on sparc
+      ruby = "#{settings[:host_ruby]} -r#{settings[:datadir]}/doc/rbconfig-#{settings[:ruby_version]}-orig.rb"
+    end
   elsif platform.is_cross_compiled?
     pkg.environment "RUBY", settings[:host_ruby]
     ruby = "#{settings[:host_ruby]} -r#{settings[:datadir]}/doc/rbconfig-#{settings[:ruby_version]}-orig.rb"
   else
     ruby = File.join(settings[:ruby_bindir], 'ruby')
   end
 
-  matchdata = platform.settings[:ruby_version].match /(\d+)\.(\d+)\.\d+/
+  matchdata = platform.settings[:ruby_version].match(/(\d+)\.(\d+)\.\d+/)
   ruby_major_version = matchdata[1].to_i
   if ruby_major_version >= 3
     base = "resources/patches/ruby_32"