component/perl: enable shared option for slapos.recipe.cmmi

Most components depend on perl.

component/perl/buildout.cfg

@@ -8,10 +8,11 @@ parts =
 
 [perl]
 recipe = slapos.recipe.cmmi
+shared = true
 version = 5.28.1
 url = http://www.cpan.org/src/5.0/perl-${:version}.tar.xz
 md5sum = fbb590c305f2f88578f448581b8cf9c4
-siteprefix = ${buildout:parts-directory}/site_${:_buildout_section_name_}
+siteprefix =@@LOCATION@@/site_${:_buildout_section_name_}
 patch-options = -p1
 patches =
   ${:_profile_base_location_}/perl-keep-linker-flags-in-ldflags.patch#4e8e0c59d7176eafb0c7402dea17bef1
@@ -21,7 +22,7 @@ patches =
   ${:_profile_base_location_}/0004-disable-probing.patch#e68446ccd155c2282639e495a5be612b
 configure-command =
   sh Configure -des \
-    -Dprefix=${buildout:parts-directory}/${:_buildout_section_name_} \
+    -Dprefix=@@LOCATION@@ \
     -Dsiteprefix=${:siteprefix} \
     -Dcflags=-I${gdbm:location}/include \
     -Dldflags="-L${gdbm:location}/lib -Wl,-rpath=${gdbm:location}/lib" \
@@ -76,6 +77,7 @@ perl-PERL5LIB =
 
 # Implementation
 recipe = slapos.recipe.cmmi
+shared = true
 url = https://www.cpan.org/modules/by-module/${:module}-${:version}.tar.gz
 configure-command =
   ${:extra-env}
@@ -84,7 +86,7 @@ configure-command =
   Makefile.PL \
   PREFIX=${:location} \
   ${:extra-configure-args}
-location = ${buildout:parts-directory}/${:_buildout_section_name_}
+location = @@LOCATION@@
 # Install scripts in "perl-bin", but create wrappers in ./bin/
 make-options =
   INSTALLSITESCRIPT=${:location}/perl-bin/